Rainy Season Research Articles

Microplastics in rice-based farming systems and their connection to plastic waste management in the Chicoral district of Espinal-Tolima.

Microplastics in rice-based farming systems and their connection to plastic waste management in the Chicoral district of Espinal-Tolima.

Driving mechanisms of monthly ocean front variations in a typical mariculture bay: insight from quantitative analysis of dual water isotopes.

Driving mechanisms of monthly ocean front variations in a typical mariculture bay: insight from quantitative analysis of dual water isotopes.

Crescimento e desempenho produtivo da mandioca em diferentes épocas de plantio no Agreste de Alagoas, Nordeste do Brasil

ABSTRACT The aim of this study was to evaluate the influence of different planting times and meteorological variables on the productive performance of industrial cassava in the Agreste region of Alagoas state, Brazil. The treatments were five planting dates, 25 days apart: D1 - April 10, D2 - May 5, D3 - May 30, D4 - June 24 and D5 - July 19. The experiment was conducted from April 2021 to September 2023 (two cultivation cycles), using randomized blocks, with four replicates. The variables analyzed were agrometeorological data, crop growth and yield. In the Agreste region of Alagoas, the average daily ET0 varies from 2.9 to 4.7 mm between the rainy and dry seasons, respectively. The average temperature of 24.3 °C meets the thermal demands of cassava cultivation. Although annual rainfall is sufficient to guarantee cassava production, it is seasonal, with a dry period from spring to summer, which compromises subsequent plantings. In the Agreste region of Alagoas, the best time to plant cassava is from April 10 to May 5, which is the beginning of the rainy season and ensures better vegetative canopy height (3.2 m), stem diameter (2.8 cm), leaf area index (3.0), maximum root length (43.1 cm), number (6.6) and yield (72.8 t ha-1), total biomass (145 t ha-1) and starch content (34.3%).

Packing house climatizado com resfriadores evaporativos - Parte 2: Mapeamento geoestatístico

ABSTRACT The acclimatization of packing houses is essential for human well-being, and, as it is a production environment, it is desirable that environmental variables are homogeneous. Therefore, this study was conducted with the aim of evaluating the environment in the selection and packaging area of a climate-controlled grape packing house with an evaporative cooling system, characterizing the spatial thermal variability and identifying critical control points. The climatic variables temperature, relative humidity and wind speed were analyzed, at 10:00, 13:00 and 15:00 h during the dry and rainy seasons. Two treatments were evaluated: with evaporative coolers switched on and switched off. The spatial distribution of the variables was mapped by kriging. The evaporative cooling system improved the thermal conditions in the selection and packaging area of the packing house but did not ensure homogenization. Critical points were identified at the beginning of the processing line, in a region further away from the coolers. The use of geostatistics and kriging maps made it possible to identify the spatial variability of climatic attributes and localize problematic regions, which allowed targeted corrections to be made to the factors that compromise human thermal comfort.

Radon progeny: Behaviour and influencing factors in indoor and outdoor environment.

Radon progeny: Behaviour and influencing factors in indoor and outdoor environment.

Presence of microplastics in Sciades herzbergii (Bloch, 1794) captured in harbor areas of the Amazon coast, Maranhão, Brazil.

Presence of microplastics in Sciades herzbergii (Bloch, 1794) captured in harbor areas of the Amazon coast, Maranhão, Brazil.

Deciphering the contribution of algae-rich microbial communities to dissolved organic matter in a eutrophic lake with distinct rainy and dry seasons

Deciphering the contribution of algae-rich microbial communities to dissolved organic matter in a eutrophic lake with distinct rainy and dry seasons

Moisture Sources and Sinks of Low-Level Jets in South China: A Backward and Forward Trace Model Approach

Abstract Low-level jets (LLJs) play a critical role as carriers of moisture, significantly influencing heavy rainfall. In South China, three distinct LLJ branches are identified: the boundary layer jets in the Beibu Gulf (BLJ-BG) and in the northern South China Sea (BLJ-SCS), as well as the synoptic-system-related LLJs in South China (SLLJ-SC). This study investigates their varying moisture transport, sources, and sinks utilizing the Hybrid Single-Particle Lagrangian Integrated Trajectory model (HYSPLIT), employing both backward and forward trace simulations. As the presummer rainy season progresses, the primary moisture sources of LLJs gradually shift southwestward from the South China Sea to the Indian Ocean. BLJ-BG predominantly directs moisture trajectories to cross the Indochina Peninsula, facilitating more moisture transport from the Indian Ocean (∼42.7% after the onset of the South China Sea summer monsoon) and strengthening monsoonal moisture transport compared to non-BLJ-BG events. Conversely, BLJ-SCS consistently draws moisture from the South China Sea (∼44.5%), with trajectories circumventing the Indochina Peninsula. Notably, BLJ-SCS transports even less moisture from the Indian Ocean than nonevent periods. After the monsoon onset, SLLJ-SC shares a common southwestern moisture channel with BLJ-BG and exhibits a pronounced tendency to transport moisture from the northern side (∼10.3% moisture trajectories) compared to other LLJs, though still less than the non-SLLJ-SC events. Moisture transported by BLJ-BG (BLJ-SCS) is released in northeastern Guangxi (central Guangdong), coinciding with intensified inland maximum rainfall centers. SLLJ-SC transports more moisture further north into northern Jiangxi, aligning with the formation of rainbands further north. Significance Statement Different types of low-level jets (LLJs), including boundary layer jets and synoptic-weather-related LLJs occur frequently in South China during the presummer rainy season. This study distinguishes their respective roles in moisture transport from the perspectives of moisture paths, sources, and sinks. These LLJs do not uniformly enhance the southwesterly monsoonal moisture transport from distant oceanic regions. In particular, the boundary layer jets in the northern South China Sea predominantly draw moisture nearby. Moisture sinks associated with these LLJs align with areas where precipitation is intensified. This study provides valuable insights for forecasting extreme precipitation events in the region and establishes a connection between the origins and culmination of moisture in rainfall through the perspectives of LLJs as a crucial moisture carrier.

Occurrence of Protozoans on Clarias gariepinus at Omi Dam in Omi, Yagba West Local Government Area, Kogi State

35 million people in Nigeria and other Sub-Saharan African nations rely entirely or partially on fisheries and aquaculture as their primary source of income and food. This study was to determine the occurrence of protozoan on Clarias gariepinus. Total of 506 sample of both Adult and juvenile of Clarias gariepinus were purchased from Fishermen at Omi Dam in Omi from January–December, 2022. This study was done in both dry and rainy season, parasites species were looked out for in the gills, skin, operculum, muscle, liver, gut, intestine and stomach of Clarias gariepinus. Protozoans were isolated using a binocular lens to check for and subsequently followed by scraping of the protozoans and were isolated using forceps and subsequently viewed under a dissecting microscope and photomicrograph was used at x400 objectives. Identification was done using Parasitic Fauna of Fresh Water Fishes Ukrianian (S.S.R.). 102 fishes were infected with parasites and prevalence of 20.16% out of which is 38 protozoans. Six protozoan species were encountered during this study. Ichthyophthirius multifilis was most prevalent; Trypanosoma cobitis was also discovered during this study. Other protozoans include Eimeria rivirei, Myxosoma branchialis, Myxidium oviforme and Chloromyxum mucronatum). Parasites can cause weight loss, debilitation and mortality, eventually leading to low productivity. Fish farmers should be conscious of the effect of these fish parasites and put appropriate measures for the control such as monitoring fish health and water quality.

Lima Megacity’s Influence on Aquatic Microbial Communities in the Rímac River: Dominance Over Spatial and Seasonal Variations

The Rímac River, a vital watershed on the Peruvian coast, is confronted with substantial environmental challenges stemming from intensive exploitation and widespread contamination. As the primary source of water for Lima, supplying approximately 80% of the city’s needs, the river is heavily impacted by pollutants from domestic, hospital, industrial, and mining effluents. These contaminants introduce microbiota that pose significant public health risks. This study utilizes 16S rRNA gene metabarcoding to characterize the bacterial communities along the Rímac River, examining both spatial (upper, middle, and lower basins) and temporal (dry and rainy seasons) variations. Over a year-long sampling period, DNA sequencing revealed pronounced microbiological differences between the Metropolitan and Regional zones, primarily driven by anthropogenic activities. Key findings include a significant reduction in microbial diversity and an increase in pathogenic bacteria within the Metropolitan zone, while the influence of seasonal variations and altitudinal gradients was comparatively minor. Betaproteobacteria emerged as the most abundant class across most samples. Notably, Aliarcobacter cryaerophilus, an indicator of fecal contamination and a potential public health hazard, was predominantly detected in the Metropolitan zone. These results underscore the necessity for comprehensive monitoring of the Rímac River’s microbiota, incorporating advanced molecular techniques to effectively track and mitigate pollution. The study emphasizes the urgent need for robust water quality management strategies to protect this critical resource, ensuring the health and sustainability of Lima and its surrounding regions.

Dipteran succession on decomposing domestic pig carcasses in a rural area of southeastern Brazil

Diptera plays a pivotal role in forensic investigations, particularly in estimating the post-mortem interval. This can be achieved by analyzing the succession patterns of species on decomposing bodies, which requires detailed knowledge of the local fauna. In rural areas of the Rio de Janeiro state, Brazil, forensic entomological succession remains understudied. This study aimed to evaluate the ecological succession of adult and immature dipterans on decomposing pig carcasses in rural areas of Seropédica municipality during dry and rainy seasons, through the threshold indicator taxa analysis (TITAN). For adult dipterans during the rainy season, we identified 25 ‘Z-’ taxa, with change points (cp) between days 4 and 14, while one ‘Z+’ taxon showed a cp at day 16. During the dry season, 22 ‘Z-’ taxa exhibited cp between days 4 and 1, and one ‘Z+’ taxon was identified on day 13. Among immature dipterans, we identified 3 ‘Z-’ taxa with cp between days 9 and 16, while 2 ‘Z+’ taxa showed cp. at days 5 and 21.5. Our findings provide valuable insights for forensic professionals by offering continuous ecological change point analysis, which help address the challenges of interpreting heterogeneous decomposition stages, which are often difficult to delineate in forensic casework.

Gummy stem blight in cucurbits: Pathogen biology, host range and management strategies

Gummy stem blight (GSB) is an emerging and serious disease affecting cucurbitaceous crops. It is caused by three closely related fungal pathogens: Stagonosporopsis cucurbitacearum, S. citruli and S. caricae. GSB has a wide host range among the cucurbitaceous family across the world. About 50-80 % yield losses were reported where the continuous cultivation of cucurbits is undertaken. Symptoms include water-soaked lesions on young leaves, chlorosis, splitting of cortical stem tissues and dark brown discoloration in mature fruits. The pathogen also forms chlamydospores-brown, unicellular and spherical in shape. Molecular techniques involving microsatellite markers and internal transcribed spacer (ITS) regions were used for molecular characterization of Stagonosporopsis spp. Management of GSB is still in a primitive stage; even when integrated methods are followed, they are still ineffective, specifically during rainy seasons. So, development of genetic resistance in the plants can be a good approach for minimal incidence. This review will provide insights on diversity, host range, life cycle and spread of Stagonosporopsis spp.; it also gives an emphasis on development of resistant cultivars. Genomic and molecular approaches (i.e., marker-assisted selection) will be the quick and accurate ways for selection and improvement of resistant lines.

Comparative Transcriptome Analysis Reveals the Molecular Response of Sesame Capsules to Infection by Alternaria alternata.

The genusAlternaria(Nees) is a major phytopathogen responsible for diseases. In Sesame, Alternaria alternatainfects capsules during the rainy season (August-September) in Northeast China, inducing lesion expansion and compromising seed yield and quality. To investigate the molecular response of Sesame to Alternaria alternata infection, transcriptome analyses of "Liaozhi No. 9" were conducted on the pericarp and seeds of sesame capsules before and after A. alternata infection. For the data quality control, the GC content and the proportion of Q30 bases indicated that the sequencing quality was good. The correlation analysis and principal component analysis (PCA) among sample groups demonstrated that the biological replicates had high similarity and there were obvious differences between groups. Differential gene expression analysis was performed using DESeq2. There were 5892 and 9120 differentially expressed genes in the pericarp and seeds, respectively, and among them, 2788 were the same differential genes. GO functional annotation was carried out on the differentially expressed genes, and the results showed that the differential genes were mainly enriched in biological processes (cellular processes, metabolic processes), molecular functions (catalytic activity and binding), and cellular components (cellular anatomical entities and intracellular components). KEGG metabolic pathway analysis revealed that metabolic pathways such as plant hormone signal transduction and plant-pathogen interaction were enriched after the infection of A. alternata. The genes in the jasmonic acid pathway (MYC2) and in the salicylic acid pathway (NPR1 and TGA) of the plant hormone signal transduction pathway were induced after A. alternata infection. Meanwhile, the genes in plant-pathogen interaction pathway, such as CML, CDPK and CNCGs were also induced after the infection. This study indicates that sesame capsules respond to the infection of Alternaria alternata through the genes in the plant hormone signal transduction pathway and the plant-pathogen interaction metabolic pathway, providing a theoretical basis for the subsequent research on sesame disease-resistant breeding and its molecular mechanism.

Spatiotemporal variations in rural and urban beach microplastics accumulation in sediment along Sarangani Bay Protected Seascape, Mindanao, the Philippines.

This study evaluated the seasonal changes in the abundance and composition of microplastics in beach sands from urban and rural beaches along Sarangani Bay Protected Seascape, Mindanao, the Philippines. Sand samples were collected during the wet season (August) and dry season (December) using the quadrat-based protocol, and microplastics were extracted using the flotation method. A total of 110 microplastics were collected, with 87 found in the wet and 23 in the dry seasons. Urban beaches during the wet season (0.047 particles/g) exhibited significantly higher (p < 0.05) microplastics than during the dry season (0.015 particles/g). Microplastics are significantly influenced by seasonal changes, particularly during the rainy season when increased precipitation enhances water flow, facilitating the transport of plastic materials from land sources into aquatic environments, leading to higher microplastic concentrations. Fourier transform infrared spectroscopy (FTIR) analysis was employed to identify the chemical composition of the microplastics, revealing the primary polymers present, including polyester (23.1%) and polyethylene (23.1%). In urban areas during the wet season, both polyethylene and polyester were the most dominant polymer types, each comprising 37.5% of the total. In contrast, during the dry season, phenoxy resin emerged as the sole dominant polymer type. Rural areas displayed a more varied composition during the wet season, with three polymer types recorded: propylene, polyethylene terephthalate (PET), and butyl methacrylate, each at 33.3%. However, only PET was recorded during the dry season. The highest microplastic abundance was observed in urban beach sediments during the wet season, suggesting urban runoff sources. The findings highlight the influence of human activities on coastal plastic pollution, enhanced by erosion and wet deposition during the wet season. These are crucial to reducing the influx of microplastics, safeguarding the marine ecosystem, and ensuring sustainable coastal environments for future generations.

Strongyloides stercoralis, but Not Hookworm, First-Stage Larvae Require Stool-Soluble Components for Growth and Development.

In regions with prolonged rainy seasons where hookworm and Strongyloides stercoralis (S. stercoralis) are co-endemic, the prevalence of hookworm infection frequently exceeds that of strongyloidiasis, despite both parasites sharing a similar route of infection via skin penetration by third-stage larvae (L3). Climate factors may contribute because rainwater can dilute stool, reducing bacterial abundance and stool-soluble component concentrations that may affect first-stage larvae (L1) development. In this study, we aimed to compare the stool-soluble component requirements of S. stercoralis and hookworm L1 in water-diluted stool and soil. Four sets of stool suspensions at 1:20, 1:480, and 1:30,720 dilutions, each containing 30-40 hookworm or S. stercoralis L1, were prepared. Two sets were adjusted to a minimal volume for soil addition, with and without bacteria, while the other two remained unadjusted. All suspensions were incubated at room temperature for 6 days, and the L3 were counted. In 1:20 suspensions, both hookworm and S. stercoralis L1 developed into or produced L3. However, in 1:480 suspensions, only hookworm L1 progressed to L3, regardless of bacterial addition. Neither species developed into L3 in 1:30,720 suspensions without bacteria, although hookworm L1 successfully developed into L3 when bacteria were added. Additionally, hookworm L1 developed into L3 in soil, whereas S. stercoralis L1 did not. These findings indicate that hookworm L1 require only bacteria, whereas S. stercoralis L1 depend on both bacteria and sufficient stool-soluble components. Water-diluting stool suppresses S. stercoralis L1 growth and development but not hookworm L1, which explains the higher prevalence of hookworm infection in regions with long rainy seasons.

Biogeochemical functioning of Lake Alaotra (Madagascar): a reset of aquatic carbon sources along the land–ocean aquatic continuum

Abstract. Our understanding of the role of tropical lakes in regional carbon budgets remains hampered by a lack of data covering the vast diversity of lake types and settings. Here, we provide a first comprehensive survey of the carbon (C) biogeochemistry of the Lake Alaotra system, a large shallow lake (surface of 200 km2 and maximum depth of 2 m) surrounded by an extensive floodplain and rice fields located in the highlands of Madagascar. The current landscape in the region is grassland-dominated and dotted by major gullies called “lavaka”, which have historically been claimed to lead to high erosion rates and would, thus, also mobilize large amounts of soil C. We investigated the seasonal variability in the concentrations and stable isotope ratios of inorganic and organic C pools; moreover, we examined a range of other relevant proxies, including physicochemical parameters, dissolved CO2 and CH4 concentrations, total alkalinity, and chlorophyll a (Chl a) from spatially distributed sampling and seasonal monitoring of several rivers. While rivers were found to carry high total suspended matter (TSM) loads with a modest particulate organic C (POC) content, the lake itself and its outflow were characterized by much lower TSM values and a high relative contribution of POC to TSM (% POC). The POC concentration of the outflow (13.0±7.7 mg L−1) was substantially higher than in the inflowing water (1.9±2.1 mg L−1), and δ13C values were also distinct between inflowing water (-24.6±1.8 ‰) and the lake (-26.5±2.1 ‰) or its outflow (-25.2±1.4 ‰). Similarly, the lake outflow was surprisingly rich in dissolved organic carbon (DOC) (9.5±1.4 mg L−1) compared to inflowing water (2.6±1.1 mg L−1). This indicates that the lake and its surrounding wetlands act as a substantial source of additional organic C which is exported downstream. The CO2 and CH4 concentrations in inflowing and outflowing rivers were substantially higher than in lake waters, and they peaked during the rainy season due to lateral inputs from wetlands. However, sources of POC and DOC were uncoupled: δ13C data indicated that marsh vegetation was the main source of net DOC inputs, while phytoplankton contributed substantially to POC in the lacustrine waters, at least during parts of the sampling period. Indeed, lake suspended matter has relatively low POC / Chl a ratios (143–564, particularly during the May sampling period), high % POC (10 % to 29 %), and δ13C values (-26.5±2.1 ‰) distinct from those in marsh-derived organic matter. Despite the evidence for phytoplankton production as a contributor to the lake POC pool, the lake acted as a net source of CO2 to the atmosphere, likely due to the high C inputs from the surrounding marshes and to sediment respiration (considering the shallow water depth). Nevertheless, the partial pressure of CO2 (pCO2) levels in the surface waters of the lake were lower than those in the inflowing and outflowing rivers. This reduction is likely due to the combined effects of phytoplankton production, which assimilates CO2 during photosynthesis, and degassing processes. When CO2-supersaturated riverine water enters the open lake, increased turbulence caused by wind fetch enhances gas exchange with the atmosphere, allowing CO2 to escape more readily from the water column. The biogeochemical functioning of Lake Alaotra differs substantially from the large and deeper East African (sub)tropical lakes and is more similar to lakes surrounded by flooded forests in the Congo River basin, likely due to a combination of its large surface area and shallow water depth and the large extent of surrounding wetlands and floodplains. It acts as an abrupt element in the land–ocean continuum of the catchment, whereby the biogeochemical characteristics of the Maningory River (i.e. the lake outflow) are strongly determined by processes taking place in Lake Alaotra and its wetlands, rather than being reflective of characteristics and processes further upstream in the catchment.

Wind Energy Potential in Bonny Island Coastal Area of Nigeria Using Weibull Method

This study presents a detailed assessment of the wind energy potential of Bonny Island, Nigeria using the Weibull method. This study evaluated the wind energy potential of Bonny Island using 7-years historical wind data (2017–2023) and advanced modeling techniques, including Weibull distribution analysis. The findings highlight that the average wind speed on Bonny Island is 4.15 m/s, with a power density averaging 157.9 W/m² with a 50th percentile of 129 W/m². These metrics, though modest compared to global standards, provide a stable resource for energy generation, making Bonny Island a viable candidate for wind power development. Turbulence intensity was found to be moderate, with about 35% of the observed days falling within the range of 0.15 to 0.20, indicating relatively stable turbulence levels over time The statistical analysis of wind speed and power density revealed variability across seasons, with the rainy season demonstrating stronger wind regime and higher power density than the dry season.

Spatiotemporal analysis of Anopheles gambiae larval sites and malaria transmission in Djilakh, Central Senegal

BackgroundThe progress made against malaria has resulted in a nationwide reduction of the disease burden in Senegal. The observed overall low transmission levels are, however, marked by an important spatial heterogeneity with hotspots subsisting in several parts of the country. This requires the determination of the local and regional factors of the observed disparities for tailored interventions to accelerate malaria elimination everywhere. This study aimed to demonstrate the role of larval breeding sites on malaria epidemiological trends in Djilakh, which is one of the malaria hotspots of the Mbour health district.MethodsThis study was carried out between 2013 and 2017, during the rainy season (June-November) of each year and surveys per year. The malaria incidence consisted of cases confirmed by RDT and climate data, including the rainfall were retrieved from the Mbour weather station. To assess the impact of larval breeding sites on malaria transmission in Djilakh village, logistic regression under the Poisson models were run. The QGIS 2.2.0 free mapping software was used to generate maps.ResultsThe results showed that mosquito breeding sites found within and in the vicinity of the study village consisted of natural temporary ponds, characterized by clay and clay-sandy soils. The analysis of meteorological and malaria morbidity indicated that malaria transmission is influenced by precipitation. The correlation between malaria morbidity and functioning breeding sites varied throughout the rainy season, depending on the size and stability of the existing breeding sites. The incidence of malaria cases was significantly higher (82.4%; 103/125; P < 0.011; OR = 27.006) in hamlets closer to the breeding sites (less than 500 m), declining gradually with distance with 17.6% (22/125) of the cases recorded in hamlets located between 500 and 1000 m apart from the larval habitats and, no cases in the most remote hamlets (> 1000 m).ConclusionsThese findings represent a preliminary step towards a better understanding of how the environmental factors influence the persistence of malaria transmission in the studied hotspot villages in Senegal. The generated results indicate a need for targeted control actions in the studied site.

IDENTIFICATION, CHARACTERISATION, AND EVALUATION OF HONEY BEE FLORA IN BENISHANGUL GUMUZ REGIONAL STATE, ETHIOPIA

This study aimed to identify and evaluate the major and minor bee forage sources to recommend seasonal colony management practices. Conducted in the Bambasi, Homosha, and Mao Komo districts of Benishangul Gumuz Regional State in western Ethiopia, the research involved a survey of 90 beekeepers using semi-structured questionnaires from three peasant associations per district. Honey and pollen samples were collected from established colonies in each district for melissopalynological analysis. 71 plant species were identified as forage sources for honeybees in the study area. Two primary flowering periods were observed in 2020, 2021, and 2022 G.C., corresponding to the honey harvesting seasons. During the first season, key plants included Pterocarpus lucens, Bidens prestinaria, Glycine species, Guizotia abyssinica, Guizotia scabra, and several Bidens species. From February to May, the main sources of pollen and nectar in the second season were woody plants such as Cordia africana, Syzygium guineense, Turraeanthus africanus, and Terminalia laxiflora. In the first honey flow season, Guizotia scabra and Guizotia abyssinica made up 62.13% of monofloral honey. In the second season, Turraeanthus africanus and Syzygium guineense contributed 48.23%. In Benishangul Gumuz, beekeepers report that food scarcity peaks during the rainy season (late July to August) and the dry season (December to January) when flowering plants are limited. Providing supplemental food and water and conducting regular inspections is important to support the bee colonies during these times. Additionally, rapid biodiversity loss from deforestation and agricultural expansion reduces available bee forage in the region.

TaPP2C-a6 interacts with TaDOG1Ls and regulates seed dormancy and germination in wheat.

Modern wheat cultivation requires seed to germinate rapidly and uniformly with weak dormancy. However, such varieties tend to undergo pre-harvest sprouting (PHS) if the harvest overlaps with the rainy season, causing substantial yield losses. Knowledge regarding the mechanisms of seed dormancy in wheat (Triticum aestivum L.) is limited, with only a few causal genes of the many PHS quantitative trait loci (QTLs) characterized. Here, we emphasize the involvement of ABA signalling core components in regulating seed dormancy and germination in wheat. TaPP2C-a6 was identified as the likely causal gene of wheat PHS-QTLs QPhs.wsu-1A/1B and QPhs1D.1_nwafu loci. Both TaPP2C-a6 and TaPP2C-a7 were highly expressed at embryonic developmental stages and germinating seeds, whereas TaPP2C-a6 was up-regulated during embryo maturation and seed germination. TaPP2C-a6 and TaPP2C-a7 were clade-A PP2Cs that interacted with TaPYLs and class III TaSnRK2s; however, TaPP2C-a6 showed stronger interactions with TaDOG1L members than those of TaPP2C-a7. TaPP2C-a6 overexpression in transgenic Arabidopsis thaliana caused a more severe reduction in ABA sensitivity than TaPP2C-a7 overexpression. Overexpression of TaPP2C-a6 in transgenic A. thaliana and wheat increased PHS levels, whereas TaPP2C-a7 transgenic A. thaliana did not affect PHS levels, confirming that TaPP2C-a6 is a novel regulator of wheat seed dormancy and germination. In summary, we demonstrated that leveraging the knowledge of seed dormancy and germination from model species could rapidly identify the causal genes of PHS-QTLs in wheat. Significantly, we showed that the TaPP2C-TaDOG1L interactions, particularly the interaction strength, could be a new aspect in the regulation of seed dormancy and germination.