Intimacy Research Articles

The Effect of Military Expenditure on Economic Prosperity in Croatia

The objective of this study was to empirically evaluate the impact of military spending on the economic well-being of the Croatian economy. The objective of the study was as well to find out if military expenditure could bolster the economic growth. Croatia has been among the European nations with significant military expenditures over the past three decades. However, these expenses have substantially decreased due to successful peace initiatives and the country's accession to the European Union. Reflecting on Croatia's history, notably during the Croatian War of Independence, the government significantly augmented its military expenditures. The sample period of the study was for 40 years from 1981 to 2020. An applied econometrics methodology called the 2-Stage Least Squares with Instrumental Variables was utilised in the study. In the first stage, instrumental variables were used to instrument for the endogenous regressors. In the second stage, the predicted values obtained from the first stage were used as explanatory variables in the main regression equation. The study found that the effect of military expenditure on the economic prosperity of Croatia was positive and highly statistically significant. The study addressed an empirical gap in the literature by integrating distinctive characteristics into the model concerning the long-term relationship between Croatia's military expenditure and economic growth. These factors enhanced empirical accuracy and instilled confidence in the broader and diverse literature concerning military expenditure and economic growth. The implication of this study is that investing in the military provides an enabling environment for economic growth to increase.

Institutional Betrayal in the Criminal and Civil Legal Systems: Exploratory Factor Analysis with a Sample of Black and Hispanic Survivors of Intimate Partner Violence.

Institutional betrayal (IB) is well-documented among survivors of gender-based violence seeking help and/or reporting incidents of violence in various settings, including college campuses and health care settings. Two of the most common institutions from which survivors seek help are the criminal and civil legal systems; however, less is known about the experiences of IB among survivors interfacing with those systems. Previous studies exploring IB have implemented the Institutional Betrayal Questionnaire (IBQ) and its various adaptations, but this scale has not yet been analyzed in the criminal or civil legal context, nor has it been analyzed among racially marginalized survivors. This paper explores the potential for utilizing the IBQ-Health among a sample of 199 Black and Hispanic survivors of intimate partner violence (IPV) who sought help from the criminal and/or civil legal system(s). An exploratory factor analysis was conducted to explore the fit of the measure to the data. Results suggest that the measure as it has previously been used does not demonstrate strong reliability or fit with this population or institution. Possible explanations and future directions are explored, including support for developing and piloting a new measure to assess IB among Black and Hispanic survivors of interpersonal violence who are seeking help from criminal and civil legal institutions.

Professional's Views on the 'Nordic Paradox' in a Low Intimate Partner Violence Prevalence Country.

The apparently contradictory co-existence of high levels of gender equality and intimate partner violence against women (IPVAW) found in Nordic countries has been termed the Nordic Paradox. The aim of this study was to examine how the Nordic Paradox is discussed and explained by Spanish professionals working in the IPVAW field. Five focus groups (n = 19) and interviews with key informants (n = 10) were conducted. Four main categories of possible explanations for the Nordic Paradox were identified: Macro-micro disconnect (i.e., discordance between individual beliefs and behaviors and macro-social norms of gender equality), IPVAW as multicausal (i.e., IPVAW defined as a multicausal phenomenon that does not necessarily have to be associated with gender equality), cultural patterns of social relationships (i.e., the role of social relationships and the way people relate to each other in the Nordic countries), and backlash effect (i.e., men's reaction to greater equality for women). Although this study does not provide a final explanation for the Nordic paradox, its results provide us with a better understanding of the phenomenon and can help to advance research in this field.

Supplemental Material for Intimate Partner Aggression Predicts Depressive Symptomatology Across the First 9 Years of Marriage

Supplemental Material for Intimate Partner Aggression Predicts Depressive Symptomatology Across the First 9 Years of Marriage

Investigating the Impact of Reproductive Coercion and Intimate Partner Violence on Psychological and Sexual Wellbeing.

Emerging research suggests that reproductive coercion and abuse (RCA), like intimate partner violence (IPV), is associated with poorer mental and sexual health outcomes, including greater symptoms of post-traumatic stress disorder (PTSD) and depression and poorer markers of physical and sexual health such as sexually transmitted infections, unplanned pregnancies and lowered sexual agency. Although victims/survivors of RCA report long-lasting impacts on future relationships, including fear and anxiety, little is known about impacts of RCA on anxiety and general wellbeing, nor emotional and mental components of sexual health that comprise a person's sexual self-concept. With community samples of participants in Australia, we conducted two studies to explore the impact of RCA and IPV on psychological (study 1) and sexual (study 2) health outcomes. Study 1 (n = 368) found that experiencing IPV and RCA both significantly and uniquely contributed to poorer mental health outcomes. After controlling for age and IPV, RCA significantly predicted symptoms of depression, anxiety, stress, PTSD, and reduced satisfaction with life. Study 2 (n = 329) found that IPV and RCA differentially predicted various components of sexual health. IPV predicted decreased sexual satisfaction and increased sexual anxiety, depression, and fear of sexual encounters. After controlling for age and IPV, RCA significantly and uniquely predicted lower levels of sexual assertiveness and increased sexual depression and fear of sexual encounters, but not sexual satisfaction or anxiety. We conclude that RCA is associated with significant psychological distress and a negative sexual self-concept that may impact future relationships. Screening for both IPV and RCA across settings is warranted.

Profiles of service-engaged intimate partner violence survivors: Considerations for service delivery and continuation.

Profiles of service-engaged intimate partner violence survivors: Considerations for service delivery and continuation.

Lessons Learned-A Case for Required Student Services 1:1 Orientation.

Both faculty and student learners associated with physician assistant/associate (PA) programs continue to suffer from the effects of the ongoing mental health crisis. Furthermore, student learners may have other personal needs impacting their potential success in PA school (ie, financial, academic, or other). A proactive approach to supporting student learners early in their PA educational journey is warranted. Required 1:1 face-to-face orientations between incoming PA students and a representative from the Office of Wellness and Academic Support (OWAS) were implemented during the first week of PA program orientation. Students were allowed time and space to privately share their individual experiences and concerns as they entered PA school. In addition, the student services representative from OWAS was able to provide customized education on the variety of resources available for students. The student services representative from OWAS established personal relationships with each of the incoming PA students. Multiple follow-up appointments and referrals were made to various service lines including tutoring, learner accommodations, and mental health counseling. The implementation of required 1:1 face-to-face orientations between incoming PA students and student services during the first week of PA program orientation was highly effective. The primary lesson learned is that a simple, preventative, proactive approach can be extremely impactful if we are willing to view the challenges of student learners in PA education through a different lens.

Epidemiology of Intimate Partner and Domestic Violence-Related Traumatic Brain Injury in the United States, 2018 to 2021: A National Trauma Data Bank Cohort Analysis of 3891 Patients.

Despite profound medico-socio-legal consequences of traumatic brain injury (TBI) from intimate partner violence and domestic violence (IPV/DV), the incidence and acute outcomes of concurrent IPV/DV-TBI are not well understood. We examined US IPV/DV patients with/without TBI (IPV/DV-TBI; non-TBI) using the National Trauma Data Bank. We hypothesized IPV/DV-TBI would be associated with elevated morbidity. National Trauma Data Bank Trauma Quality Programs Participant Use Files years 2018 to 2021 were queried for patients aged ≥18 years with IPV/DV using International Classification of Diseases, Tenth Revision external cause codes. TBI/non-TBI was defined using International Classification of Diseases, Tenth Revision diagnosis codes. TBI severity was defined by the Glasgow Coma Scale (severe = 3-8, moderate = 9-12, and mild = 13-15). Outcomes were intensive care unit (ICU) admission, in-hospital mortality, length of stay (LOS), and discharge home. Multivariable regressions examined associations between TBI and outcomes, controlling for sociodemographic and injury severity variables. Of 3891 IPV/DV-related cases, 31.1% were IPV/DV-TBI. Cranial injuries included skull fracture (30.2%), subdural (19.8%), subarachnoid (13.4%), and epidural (1.1%) hemorrhage, contusion (8.1%), and cerebral edema (3.3%). In IPV/DV-TBI, mild/moderate/severe TBI proportions were 87.4%/4.3%/8.3%, with mean LOS 11.5 ± 10.9/14.4 ± 27.3/5.0 ± 7.7-days and mortality 0.9%/22.5%/28.6%, respectively. Compared with non-TBI, IPV/DV-TBI had more female (77.2%/64.6%, P < .001) and fewer Black patients (28.9%/36.6%, P < .001), more ICU admissions (20.9%/7.5%, P < .001) and mortality (4.1%/1.8%, P < .001), longer LOS (5.3 ± 9.5/4.5 ± 6.4-days, P = .008), and decreased discharge home (79.8%/83.8%, P = .005). Multivariable regressions confirmed the associations between TBI and ICU admission (adjusted odds ratio [aOR] = 4.29, 95% CI [3.46-5.33]), mortality (aOR = 3.20 [1.99-5.15]), LOS (adjusted mean difference = +1.22 [0.68-1.76]), and inability to discharge home (aOR = 0.57 [0.46-0.71]). One-third of US IPV/DV-related trauma cases have TBI, comprising predominantly female patients. Black patients with IPV/DV-related trauma were overrepresented compared with US census estimates. IPV/DV-TBI had increased ICU admissions, LOS, in-hospital mortality, and inability to discharge home compared with non-TBI. Investigating morbidity risk factors and providing sociomedical resources during acute care are critically needed in this vulnerable population.

Losing sight of the abuse: how and why women’s and children’s rights are violated in child contact decisions after intimate partner violence in Europe

ABSTRACT International human rights law sets out the right to life and freedom from torture and ill-treatment. This includes the positive obligation of states to prevent, protect and punish acts of private individuals that threaten the life and limb of another person. Permeating through many areas of law, this duty of due diligence is particularly important for women and children who require protection from abuse perpetrated by intimate partners or family members. The Council of Europe Convention on Preventing and Combating Violence against Women and Domestic Violence details these obligations, including in family law. Based on the work of the convention’s independent monitoring body (GREVIO), this article offers a categorisation of factors and mechanisms that thwart women’s and children’s rights in family law proceedings, resulting in unsafe child contact regulation after intimate partner violence. It shows the shared nature of these factors across several European jurisdictions and places them in context with the interpretative work of international human rights bodies and the European Court of Human Rights. Situating the discussion in the context of growing anti-feminist movements seeking to expand patriarchal notions of family authority, it argues for an understanding of family law processes as a setting for human rights violations.

Quantifying disparities in intimate partner violence: a machine learning method to correct for underreporting

The first step towards reducing the pervasive disparities in women’s health is to quantify them. Accurate estimates of the relative prevalence across groups—capturing, for example, that a condition affects Black women more frequently than white women—facilitate effective and equitable health policy that prioritizes groups who are disproportionately affected by a condition. However, it is difficult to estimate relative prevalence when a health condition is underreported, as many women’s health conditions are. In this work, we present PURPLE, a method for accurately estimating the relative prevalence of underreported health conditions which builds upon the literature in positive unlabeled learning. We show that under a commonly made assumption—that the probability of having a health condition given a set of symptoms remains constant across groups—we can recover the relative prevalence, even without restrictive assumptions commonly made in positive unlabeled learning and even if it is impossible to recover the absolute prevalence. We conduct experiments on synthetic and real health data which demonstrate PURPLE’s ability to recover the relative prevalence more accurately than do previous methods. We then use PURPLE to quantify the relative prevalence of intimate partner violence (IPV) in two large emergency department datasets. We find higher prevalences of IPV among patients who are on Medicaid, not legally married, and non-white, and among patients who live in lower-income zip codes or in metropolitan counties. We show that correcting for underreporting is important to accurately quantify these disparities and that failing to do so yields less plausible estimates. Our method is broadly applicable to underreported conditions in women’s health, as well as to gender biases beyond healthcare.

“Prevalence and Associated Factors of Perinatal Suicide Risk in Spanish Women”

Suicide is one of the leading causes of death worldwide, and in the perinatal period, the trend is increasing, even up to 100 times in the US. No studies have been carried out with validated instruments despite abundant recommendations to do so. This study aims to determine the prevalence of perinatal suicide risk in Spanish women, as well as the factors associated with it. A cross-sectional study was carried out with 908 women in the perinatal stage. Sociodemographic and obstetric variables, anxiety level (GAD-7), social support (DUKE-UNC), risk of intimate violence (WAST), and suicidal ideation (Paykel) were collected. Crude (OR) and adjusted odds ratios (aOR) were calculated using logistic regression for the main risk factors for suicidal ideation. The prevalence of suicidal ideation was 19.3% (175), and suicide attempt 2.4% (22). In the perinatal stage, the risk factors were anxiety [aOR of 1.08 (95% CI: 1.04-1.31)], experiencing a possible situation of intimate partner violence [aOR of 1.59 (95% CI: 1.04-2.43)], and a risk of PPD [aOR of 3.00 (95% CI: 1.86-4.81)]. Perceived social support appears as a protective factor [aOR of 0.97 (95% CI: 0.95-0.99)], along with skin-to-skin contact with the baby during childbirth [aOR 0.50 (95% CI: 0.28-0.88)]. Conclusions: Presenting anxiety or depression, little social support, and living in a possible situation of intimate partner violence are associated with a greater risk of suicidal ideation during the perinatal stage.

Longitudinal Exploration of Prenatal and Postnatal Intimate Partner Violence, Postpartum Depression, and Child-Mother Attachment: A Mediation Model.

This longitudinal study examines the timelines of occurrences of intimate partner violence (IPV) on child-mother attachment, as well as the mediating role of maternal postpartum depression (PPD). Using a sample in the United States (N = 2,268), findings suggest that, compared to mothers' prenatal IPV victimization, postnatal IPV more negatively influences child-mother attachment when the children were at 3 years old, and this negative impact on attachment was partially mediated through maternal PPD. As IPV screening for pregnant women in healthcare settings becomes a common practice, effective IPV and PPD screening postnatally should be broadly implemented to promote maternal mental health and child-mother attachment.

Clinical and pathogenetic assessment of cyclosporine efficacy in the complex therapy of non-segmental vitiligo patients

BACKGROUND: Vitiligo is a chronic disease of unknown etiology, characterized by the appearance of depigmented spots on various areas of the skin, rarely on mucous membranes, and discolored hair due to destruction and reduction of melanocytes. While not life-threatening, vitiligo significantly impacts the psychoemotional aspect. Studies assessing the quality of life of vitiligo patients reveal the presence of depression in these individuals. In addition to depression, a high susceptibility to anxiety, stigmatization, sleep disturbances, adaptation, and problems in personal relationships have been identified. The prevalence of depression and anxiety among vitiligo patients is comparable to other dermatological conditions such as atopic dermatitis, acne, psoriasis, and urticaria. This underscores the need to seek new means and methods for treating this condition. AIM: Clinical assessment of the effectiveness of using cyclosporine in combination with UVB 311 nm and monotherapy with UVB 311 nm for vitiligo. MATERIALS AND METHODS: The study involved 40 patients with progressive vitiligo. All patients were randomly divided into two groups. Group 1 (20 individuals) underwent a course of cyclosporine therapy in combination with UVB therapy, while Group 2 (20 individuals) received monotherapy with UVB 311 nm. The duration of the treatment was 6 months. The extent of the affected area relative to the body surface area was evaluated using the VES index (Vitiligo extent score) on a vitiligo calculator. The impact of the disease on the quality of life was assessed using the VitiQoL scale (vitiligo-specific quality-of-life instrument). RESULTS: All patients included in the study completed the full course of treatment. Group 1 (20 individuals) underwent a course of cyclosporine therapy in combination with UVB therapy, while Group 2 (20 individuals) received monotherapy with UVB 311 nm. Patients in the combined therapy group experienced earlier stabilization of the skin process compared to those receiving monotherapy with UVB 311 nm. Additionally, Group 1 demonstrated more pronounced repigmentation of vitiligo lesions and significant improvement in quality of life compared to Group 2. CONCLUSION: Cyclosporine in combination with narrowband phototherapy at 311 nm demonstrated good clinical efficacy and significant improvement in quality of life for non-segmental vitiligo patients. Cyclosporine is well-tolerated, has a low spectrum of side effects, and can be used long-term for patients with active vitiligo.

Exploring predictors and prevalence of postpartum depression among mothers: Multinational study

BackgroundPostpartum depression (PPD) affects around 10% of women, or 1 in 7 women, after giving birth. Undiagnosed PPD was observed among 50% of mothers. PPD has an unfavorable relationship with women’s functioning, marital and personal relationships, the quality of the mother-infant connection, and the social, behavioral, and cognitive development of children. We aim to determine the frequency of PPD and explore associated determinants or predictors (demographic, obstetric, infant-related, and psychosocial factors) and coping strategies from June to August 2023 in six countries.MethodsAn analytical cross-sectional study included a total of 674 mothers who visited primary health care centers (PHCs) in Egypt, Yemen, Iraq, India, Ghana, and Syria. They were asked to complete self-administered assessments using the Edinburgh Postnatal Depression Scale (EPDS). The data underwent logistic regression analysis using SPSS-IBM 27 to list potential factors that could predict PPD.ResultsThe overall frequency of PPD in the total sample was 92(13.6%). It ranged from 2.3% in Syria to 26% in Ghana. Only 42 (6.2%) were diagnosed. Multiple logistic regression analysis revealed there were significant predictors of PPD. These factors included having unhealthy baby adjusted odds ratio (aOR) of 11.685, 95% CI: 1.405–97.139, p = 0.023), having a precious baby (aOR 7.717, 95% CI: 1.822–32.689, p = 0.006), who don’t receive support (aOR 9.784, 95% CI: 5.373–17.816, p = 0.001), and those who are suffering from PPD. However, being married and comfortable discussing mental health with family relatives are significant protective factors (aOR = 0.141 (95% CI: 0.04–0.494; p = 0.002) and (aOR = 0.369, 95% CI: 0.146–0.933, p = 0.035), respectively.ConclusionThe frequency of PPD among the mothers varied significantly across different countries. PPD has many protective and potential factors. We recommend further research and screenings of PPD for all mothers to promote the well-being of the mothers and create a favorable environment for the newborn and all family members.

Impacts of an abbreviated personal agency training with refugee women and their male partners on economic empowerment, gender-based violence, and mental health: a randomized controlled trial in Rwanda

IntroductionWe assessed the impact of a personal agency-based training for refugee women and their male partners on their economic and social empowerment, rates of intimate partner violence (IPV), and non-partner violence (NPV).MethodsWe conducted an individually randomized controlled trial with 1061 partnered women (aged 18–45) living in a refugee camp in Rwanda. Women received two days of training, and their partners received one day of training. The follow-up survey where all relevant outcomes were assessed was carried out at 6–9 months post-intervention.ResultsAt follow up, women in the intervention arm were more likely to report partaking in income generating activities (aIRR 1.27 (1.04–1.54), p < 0.05) and skill learning (aIRR 1.59 (1.39–1.82), p < 0.001) and reported a reduction in experience of physical or sexual NPV in the past six months (aIRR 0.65 (0.39–1.07), p < 0.09). While improved, no statistically significant impacts were seen on physical or sexual IPV (aIRR 0.80 (0.58–1.09), p = 0.16), food insecurity (β 0.98 (0.93 to 1.03), p = 0.396), or clean cookstove uptake (aIRR 0.95 (0.88 to 1.01), p = 0.113) in the past six months. We found statistically significant reduction in physical and sexual IPV amongst those experiencing IPV at baseline (aIRR 0.72 (0.50 to 1.02), p < 0.07). Small improvements in self-efficacy scores and our indicator of adapting to stress were seen in the intervention arm. Some challenges were also seen, such as higher prevalence of probable depression and/or anxiety (aIRR 1.79 (1.00-3.22), p = 0.05) and PTSD (aIRR 2.07 (1.10–3.91), p < 0.05) in the intervention arm compared to the control arm.ConclusionOur findings echo previous research showing personal agency training can support economic well-being of women. We also find potentially promising impacts on gender-based violence. However, there is some evidence that integration of evidence-based mental health support is important when enhancing agency amongst conflict-affected populations.Trial registration numberThe trial was registered with ClinicalTrials.gov, Identifier: NCT04081441 on 09/09/2019.

Intimate Partner Violence and Attachment Styles as Factors Associated with Coping Stress Styles Among Iranian Women.

The current study sought to examine attachment styles as mediators between intimate partner violence (IPV) and stress coping styles among Iranian women. Data were collected from September to December 2020. The study population was composed of 102 women who were referred to Social Emergency Centers in Isfahan and affected by domestic violence. They were given self-report questionnaires to measure IPV (the Haj-Yahia Violence Questionnaire), Stress Coping Styles (CISS), and Attachment Styles (AAQ). Structural Equation Modeling was used to test the hypothesized relationships. Sexual IPV victimization was related to both avoidant attachment (β = .229, p = .015) and anxious attachment (β = .245, p = .008). Anxious attachment style was related to emotion-oriented coping (β = .437, p = .000). There was a negative relationship between avoidant attachment and anxious attachment (β = -.237, p = .032) with avoidance-oriented coping. Sexual IPV victimization and economic IPV victimization were associated with avoidance-oriented coping (β = -.225, t = 0.816, p = .015; β = .188, t = 0.816, p = .044). Women who had experienced IPV and had an insecure attachment style were more likely to utilize avoidance and emotional coping strategies. For women who had a secure attachment style, there was no association was found between IPV victimization and coping styles. Attachment styles may influence the relationship between IPV and coping strategies in Iranian women who have experienced violence.

Efficiency in Operations of NASDAQ Listed Technology Companies from 2011 to 2023

The performance of technology companies listed on NASDAQ significantly impacts larger economic trends. Investors need specific information to navigate market volatility and make informed decisions in an increasingly complex marketplace. Furthermore, amidst the ongoing digital revolution, legislators and regulatory agencies must comprehend the operational dynamics of technology companies to develop frameworks that support innovation while maintaining market stability. Our study assesses the impact on the overall operational efficiency of NASDAQ-listed firms from 2011 to 2023, resulting from the interdependence of critical variables such as selling, general, and administrative expenses (SGA), cost of goods and services sold (COGS), and investments in research and development (R&amp;D). Johansen’s cointegration methodology and pairwise Granger causality tests were employed to unveil long-term relationships, equilibrium adjustments, and causal relationships among the considered variables. The results provide critical insights into the strategic management of operational variables by the listed companies. The economic significance of the results obtained underscores the paramount importance of efficiently managing the cost of goods and services sold to achieve superior operating performance among these leading technology firms.

The protocol for a cluster randomized controlled trial to evaluate couple-based violence prevention education and its ability to reduce intimate partner violence during pregnancy in Southwest Ethiopia.

A significant proportion of women in Ethiopia suffer from violence by their intimate partner during pregnancy, which has adverse maternal and newborn outcomes. Couple-focused interventions are effective in reducing and/or controlling violence between women and their intimate partners. However, interventions addressing intimate partners of the victims are not well studied, particularly in the Ethiopian setting. This study aims to assess the effect of couple-based violence prevention education on intimate partner violence during pregnancy. We will use a cluster randomized controlled trial to evaluate the effectiveness of couple-based violence prevention education compared to routine care in reducing intimate partner violence during pregnancy. Sixteen kebeles will be randomly assigned to 8 interventions and 8 control groups. In the trial, 432 couples whose wife is pregnant will participate. Health extension workers (HEWs) will provide health education. Data will be collected at baseline and endline. All the collected data will be analyzed using Stata version 16.0 or SPSS version 25.0. We will use the McNemar test to assess the differences in outcomes of interest in both intervention and control groups before and after the intervention for categorical data. A paired t-test will be used to compare continuous outcome of interest in the intervention and the control groups after and before the intervention. The GEE (Generalized Estimating Equation), will be used to test the independent effect of the intervention on the outcome of the interest. Data analysis will be performed with an intention-to-treat analysis approach. During the analysis, the effect size, confidence interval, and p-value will be calculated. All tests will be two-sided, and statistical significance will be declared at p < 0.05. We expect that the study will generate findings that can illuminate violence prevention strategies and practices in Ethiopia. It has been registered on ClinicalTrials.gov as NCT05856214 on May 4, 2023.

Horizon/Horse

Photographs and text explore multi-species empathy and loss through a long-term companionate relationship with a significant horse as teacher, collaborator, muse, and beacon. The images were made without request or instruction during acts of reciprocal caretaking and exploration. They record the pauses and accommodations of two bodies within a landscape seemingly unchanging except with the light, seasons, time, perspective, and the infinite amplitude within the daily and familiar, between human and non-human. The body of the horse becomes actual landscape, imagined landscape, embodied landscape. The text derives from writings made in the horse’s presence. To approach, to touch another carries a charge– whether of transgression or congruence. The feeling of close connection in any intimate relationship also carries a sense of deep strangeness and far places. Who bodies are, where and how they occupy the landscape– itself a body– defines relationships. This project considers how (human and non-human) animals experience space and proximity, distance and absence, and how we bond to one another. Our histories and memories, yearnings, inform the through-lines of synchronous connection.

Widespread horizontal gene transfer between plants and bacteria

Abstract Plants host a large array of commensal bacteria that interact with the host. The growth of both bacteria and plants is often dependent on nutrients derived from the cognate partners, and the bacteria fine-tune host immunity against pathogens. This ancient interaction is common in all studied land plants and is critical for proper plant health and development. We hypothesized that the spatial vicinity and the long-term relationships between plants and their microbiota may promote cross-kingdom horizontal gene transfer (HGT), a phenomenon that is relatively rare in nature. To test this hypothesis we analyzed the Arabidopsis thaliana genome and its extensively sequenced microbiome to detect events of horizontal transfer of full length genes that transferred between plants and bacteria. Interestingly, we detected 75 unique genes that were horizontally transferred between plants and bacteria. Plants and bacteria exchange in both directions genes that are enriched in carbohydrate metabolism functions, and bacteria transferred to plants genes that are enriched in auxin biosynthesis genes. Next we provided a proof of concept for the functional similarity between a horizontally transferred bacterial gene and its Arabidopsis homologue in planta. The Arabidopsis DET2 gene is essential for biosynthesis of the brassinosteroid phytohormones and loss-of-function of the gene leads to dwarfism. We found that expression of the DET2 homologue from Leifsonia bacteria of the Actinobacteria phylum in the Arabidopsis det2 background complements the mutant, and leads to normal plant growth. Together, these data suggest that cross-kingdom horizontal gene transfer events shape the metabolic capabilities and interactions between plants and bacteria.