Lablab Research Articles

Constituents, Antioxidant and Antibacterial Abilities of Essential Oil of Dolichos lablab Flowers and Its Application as Food Preservative

ABSTRACTDolichos lablab flowers, as the dried buds of D. lablab L, was used as an ingredient in various dishes in China, and there were no studies on the constituents, antioxidant and antibacterial activity with the essential oil. The constituents, antioxidant and antibacterial ability of the essential oil of D. lablab flowers (EOF) obtained by hydro‐distillation (HD) method were evaluated, and its efficacy in fresh pork preservation was studied. The 36 components were recognised, accounting for 96.46% of EOF. The proportion of oxygen‐containing compounds in EOF was as high as 89.72%, of which fatty acid accounted for 65.82%. Among fatty acids, palmitic acid (33.86%), myristic acid (8.42%), lauric acid (5.42%) and 2E‐dodecenoic acid (4.46%) were identified as the major compounds. EOF had an excellent antioxidant ability. The semi‐radical scavenging concentrations (IC50) of EOF for 2,2‐Diphenyl‐1‐picrylhydrazyl (DPPH−), 2,2′‐Azinobis‐(3‐ethylbenzthiazoline‐6‐sulphonate) (ABTS+) and liposomal peroxidation were 3.09, 2.46 and 0.82 mg/mL. EOF also showed good antibacterial ability, including Bacillus subtilis, Listeria monocytogenes, Escherichia coli and Staphylococcus aureus. And the L. monocytogenes showed the highest sensitivity to EOF with the minimum inhibitory concentration (MIC) of 1.25 μg/mL and the minimum bactericidal concentration (MBC) of 2.5 μg/mL. Further research showed that EOF achieved its antibacterial effect by destroying the functional and structural integrity of cell membranes and cell walls of L. monocytogenes, leading to the leakage of alkaline phosphatase (AKP), nucleic acids and proteins, ultimately leading to L. monocytogenes death. The pork fresh‐keeping results showed that 1.0% EOF extend the shelf‐life of pork up to day 6, which was 2.00 times than the control during 7 days of refrigeration at 4°C. This study will provide the fundamental data support for future potential applications of EOF in food preservation.

The property differences of essential oils extracted by two methods from Dolichos lablab flowers: chemical composition, anti-microorganism and cholinesterase inhibition activities

In this study, the essential oils of Dolichos lablab (syn. Lablab purpureus) flowers (EOFs) were extracted by enzymatic pretreatment plus microwave extraction (EP-ME) method, and the key factors affecting yield of essential oils were investigated. The kinetic curves of essential oils extracted by EP-ME method were fitted, and the results showed that the first-order kinetic model was more appropriate for essential oils extracted by EP-ME method. Under the optimal extraction conditions, EP-ME method not only had high extraction yield, but also had low consumption time. The yield of essential oil extracted by EP-ME method (0.41 ± 0.021% g/g) was 51.9% higher than that by traditional hydro-distillation (HD) method (0.27 ± 0.013% g/g), and the time and energy consumption were 53.33% and 18.62% of the HD method, respectively. The results of GC-MS showed that the contents of main substances in the essential oils by EP-ME method were remarkably increased, including hexadecanoic acid methyl ester (+11.05%), 9Z,12Z,15Z-octadecatrienoic acid methyl ester (+5.26%), (Z)-9-octadecenoic acid methyl ester (+3.85%), methyl hexadic-9-enoate (+3.11%), methyl linoleate (+2.68%), linalool (+1.83%), and methyl stearate (+1.18%). In vitro activity results revealed that EOFs extracted using EP-ME method not only had certain anti-microorganism activity, but also possessed good cholinesterase inhibition activity, and its semi-inhibition concentrations (IC50) against acetyl-cholinesterase and butyrylcholinesterase were 2.48 and 2.31 mg/mL, respectively. Therefore, the EP-ME method was a kind of green and effective method for extracting high-quality essential oils from Dolichos lablab flowers.

Pesticide residue contamination in eggplant and hyacinth bean at eight different regions of Bangladesh

Pesticide residue contamination in eggplant and hyacinth bean at eight different regions of Bangladesh

Near Infrared Reflectance Spectroscopy-Driven Chemometric Modeling for Predicting Key Quality Traits in Lablab Bean (Lablab purpureus L.) Germplasm

Lablab bean (Lablab purpureus L.) is a multipurpose crop, commonly used for food, feed, and fodder, and its potential as a plant-based meat alternative. Its nutritional diversity, including high protein, starch, and phenolic content, makes it a suitable candidate for nutritional profiling, which is essential for developing nutritionally enhanced varieties. Traditional methods for analyzing its nutritional parameters are labor-intensive, time-consuming, and expensive. This study employs Near-Infrared Reflectance Spectroscopy (NIRS) as a rapid, non-destructive alternative to evaluate 112 Lablab bean genotypes. We developed prediction models for starch, amylose, protein, fat, and phenols using a Modified Partial Least Squares (MPLS) approach, with spectral pre-processing using Standard Normal Variate (SNV) to remove scatter effects and Detrending (DT) to reduce baseline shifts and noise. The models were optimized for derivatives, gap selection, and smoothing, and evaluated using independent test data and key performance metrics including coefficient of determination (R²), bias, and Residual Prediction Deviation (RPD). The best-performing models were: starch (R² = 0.959, RPD = 4.57), amylose (R² = 0.737, RPD = 1.76), protein (R² = 0.911, RPD = 3.09), fat (R² = 0.894, RPD = 2.92), and phenols (R² = 0.816, RPD = 2.36). Statistical tests, including paired t-tests, correlation, and reliability analysis, confirmed the robustness of these models. This study presents a first report offering rapid, multi-trait assessment method for evaluating Lablab bean germplasm, demonstrating high predictive accuracy for pre-breeding practices. It has broad applications in developing nutritionally enhanced varieties, supporting plant-based protein alternatives, and optimizing food production processes to meet the growing demand for healthier, sustainable foods.

High Abundance of Unusual High Mannose N-Glycans Found in Beans.

High mannose N-glycans extracted from eight different beans (black bean, soybean, pea, white kidney bean, pinto bean, mung bean, white hyacinth bean, and red bean) were studied using the state-of-the-art mass spectrometry method logically derived sequence tandem mass spectrometry (LODES/MSn). These beans show very similar N-glycan isomer profiles: one isomer of Man9GlcNAc2 and Man8GlcNAc2, two isomers of Man7GlcNAc2, three isomers of Man6GlcNAc2, and five isomers of Man5GlcNAc2 were found. Isomers not predicted by current N-glycan biosynthetic pathways were found in all beans, indicating the possibility of alternative biosynthetic pathways in these plants. The high abundance of unusual high mannose Man5GlcNAc2 N-glycans in beans is particularly useful for the large-scale preparation of high mannose N-glycans that are not easily found in the other biological systems.

The Efficacy and Safety of NOVAponin (Dolichos lablab Linne Extract Powder) in Mild Functional Dyspepsia: A Single-center, Randomized, Double-Blind, Placebo-controlled Study.

NOVAponin, a functional health food derived from Dolichos lablab Linne extract improves gastric mucosal injury and increases regeneration and proliferation. This study aims to investigate the efficacy and safety of NOVAponin in individuals with mild functional dyspepsia (FD). In this single-center, double-blind, randomized clinical trial, 131 patients with FD meeting the Rome IV criteria were enrolled. Changes in the gastrointestinal symptom rating scale (GSRS), FD-related quality of life (FD-QoL), gastrointestinal symptom (GIS) scores, inflammatory and anti-inflammatory markers, and adverse effects before and after administration were compared. After 12 weeks of administration, GSRS upper abdominal symptom scores were significantly improved in the test group compared to the control group (-5.30 ± 0.60 vs -2.35 ± 0.56, P < 0.001). GSRS upper abdominal symptom scores (-5.13 ± 0.55 vs -1.92 ± 0.44, P < 0.001), GSRS total scores (-7.02 ± 0.91 vs -3.33 ± 0.73, P < 0.001), GIS total scores (-11.21 ± 0.53 vs -6.65 ± 0.70, P < 0.001) after 6 weeks of administration, GSRS total scores (-7.54 ± 0.94 v. -3.31 ± 0.85, P < 0.001), GIS total scores (-11.90 ± 0.52 vs -7.61 ± 0.73, P < 0.001), and FD-QoL total scores (-11.41 ± 1.75 vs -5.55 ± 1.20, P = 0.007) after 12 weeks of administration also showed significant differences between groups. The differences were slightly more pronounced in epigastric pain syndrome subtypes and in females than the others, although more females were assigned to the test group. There were no significant changes in inflammatory and anti-inflammatory markers or adverse reactions. NOVAponin significantly improved mild FD symptoms especially in epigastric pain syndrome subtype and in females, and was found to be safe.

Hypoglycemic effects of white hyacinth bean polysaccharide on type 2 diabetes mellitus rats involvement with entero-insular axis and GLP-1 via metabolomics study

The present study aimed to investigate the potential effects of white hyacinth bean polysaccharide (WHBP) against type 2 diabetic mellitus (T2DM) which was established by high-glucose/high-fat for 8 weeks, combined with a low-dose streptozotocin (STZ) injection. Our results showed that WHBP behaved the hypoglycemic effect by attenuating fasting blood glucose in vivo. WHBP-mediated anti-diabetic effects associated with the attenuation of insulin resistance and pancreatic impairment, as evidenced by the mitigation of pathological changes, inflammatory response and oxidative stress in the pancreas of T2DM rats. Meanwhile, gut protection was also shown during WHBP-mediated anti-diabetic effects, and glucagon-like peptide-1 (GLP-1), a mediator of the entero-insular axis, was observed to be elevated in both gut and pancreas of WHBP groups when compared to DM group, suggesting that hypoglycemic effects of WHBP were implicated in gut-pancreas interaction. Subsequently, untargeted metabolomics analysis performed by UPLC-QTOF/MS and showed that WHBP administration significantly adjusted the levels of 40 metabolites when compared to DM group. Further data concerning pathway analysis showed that WHBP administration significantly regulated the phenylalanine metabolism, tryptophan metabolism, arginine and proline, isoleucine metabolism, and glycerophospholipid metabolism in T2DM rats. Together, our results suggested that WHBP performed hypoglycemic effects and pancreatic protection linked to entero-insular axis involvement with GLP-1 and reversed metabolic disturbances in T2DM rats.

Variability and Correlation Studies in Dolichos bean (Dolichos lablab L.)

Background: Dolichos bean (Dolichos lablab L.), 2n = 22 is an important leguminous vegetable crop which provides protein, minerals and vitamins. The exploitation of variability is of great importance and is a prerequisite for the effective screening of superior genotypes. Keeping this in view, the present investigation was carried out to assess the variability and correlation for yield and other components which are useful to select the promising genotypes. Methods: The study on variability and correlation in Dolichos Bean genotypes for yield and quality was conducted at the College Orchard, Tamil Nadu Agricultural University, Coimbatore. Twenty lablab genotypes, sourced from various locations, were planted in a randomized block design with three replications during the kharif and rabi seasons of 2021 and 2022. Observations on growth, yield and quality traits were recorded and analysed for variance, variability and correlations. Result: In the kharif season, Ankur Gold yielded the highest green pods per plant (487.50 g), while Acc.7 yielded the lowest (89.59 g). In the pooled analysis, Ankur Gold (469.80 g) had the highest and Acc.6 (87.49 g) had the lowest green pod yield per plant. The study suggests using a selection index based on the number of racemes per plant, raceme length, number of pods per plant, green pod yield per plant and pod length to identify high yielding lablab genotypes.

ProTformer: Transformer-based model for superior prediction of protein content in lablab bean (Lablab purpureus L.) using Near-Infrared Reflectance spectroscopy

Lablab bean (Lablab purpureus L.), known for its higher protein content provides a promising alternative to reduce reliance on animal-based proteins and support sustainable agriculture. Nowadays, traditional methods for nutritional profiling have been outperformed by Convolutional Neural Networks (CNNs) integrated with Near-Infrared Reflectance Spectroscopy (NIRS). However, an advanced technique called Transformers, despite their potential, remains underexplored for prediction of key quality traits of crops. Thus, in the present study, we aimed to predict lablab bean protein content using a Transformer-based model (termed ProTformer) coupled with NIRS. The Dumas combustion method was used to determine protein content from 112 lablab bean genotypes. The performance of this model was compared with 1D CNN and Modified Partial Least Squares (MPLS)-based models. These models were evaluated using the Coefficient of Determination (RSQ), Residual Prediction Deviation (RPD), bias, and Corrected Standard Error of Prediction (SEP(C)). Our findings show that the Transformer-based model achieved the highest predictive accuracy (RSQ = 0.977, RPD = 13.92), surpassing the 1D CNN (RSQ = 0.956, RPD = 11.33) and MPLS (RSQ = 0.943, RPD = 10.53)- based models by 22.86% and 32.21% in RPD, respectively. The multi-head self-attention mechanism present in the Transformer-based model enables it to concurrently focus on different spectral regions, resulting in superior predictive performance. This study shows the potential of using Transformer-based models coupled with NIRS for nutritional profiling which could be effectively adapted for other crops for rapid screening of large germplasm available at global repositories.

Study of area under disease progressive curve (AUDPC) on collar rot disease of Indian bean caused by Sclerotium rolfsii in South Gujarat

Study of area under disease progressive curve (AUDPC) on collar rot disease of Indian bean caused by Sclerotium rolfsii in South Gujarat

Effects of Maize–Lablab Intercropping and Lactic Acid Bacteria Additives on Forage Yield, Fermentation Quality and Profitability

Intercropping systems and exogenous microorganism additives are recognized for their potential to influence silage fermentation and quality. This study aims to evaluate the impacts of maize–lablab bean intercropping and lactic acid bacteria (LAB) additives on silage yield, nutritional quality, and economic profitability. A randomized block design was employed with two cropping patterns—maize monocrop (M) and maize–lablab intercrop (ML)—and five additive treatments: No additives (CK), and varying ratios of Lactobacillus Plantarum (LP) and Lactobacillus Buchneri (LB), T1 (100% LP), T2 (9LP:LB), T3 (8LP:2LB), and T4 (100% LB). The silage was analyzed and evaluated for its nutritional quality, fermentation quality, and fermentation effect after 90 days of fermentation. ML intercropping significantly enhanced the fresh matter yields by 8.59% and crude protein content by 8.73% compared to M. From the point of view of inoculation with different lactobacilli, the pH, AA, and NH3-N/TN were lower in the T2 and T3 treatments than in the other treatments, while LA was significantly higher. The V-score, which reflects the overall fermentation quality, was excellent across all treatments, with scores exceeding 80 points; the T2 treatment in ML silage achieved the highest score of 99.58. In addition, intercropping can increase the net income of farmers by 21.67%. In conclusion, maize–lablab intercropping combined with LAB inoculation, particularly with the T2 and T3 treatments, significantly enhances the silage quality and economic returns by reducing pH, increasing the LA content, and improving the CP levels. This study is the first to comprehensively analyze the synergistic effects of altering cropping systems and adding functional microorganisms on forage yield and fermentation quality, offering strategic insights for farms, especially mixed farms, to produce high-quality feed. We recommend adopting these methods to improve feed quality and maximize the profitability of silage production systems.

Chikusetsusaponin IVa from Dolichos lablab Linne attenuates UVB-induced skin photoaging in mice by suppressing MAPK/AP-1 signaling

Ultraviolet-B (UVB) radiation-induced photoaging of the skin is characterized by amplified expression of matrix metalloproteinase-1 (MMP-1) and reduced collagen fibers, both of which contribute to skin wrinkle formation. Edible natural products can protect against skin photoaging. Here, we investigate the protective effect of Dolichos lablab Linne (DLL) water extract against UVB radiation-prompted skin damage and attempt to uncover its fundamental mechanisms in human keratinocytes (HaCaT) and HR-1 hairless mouse. We found DLL extract rescued the reduction in cell viability associated with UVB exposure without any associated cytotoxic effects. It also protected against skin photoaging by inhibiting mitogen-activating protein kinase (MAPK) signaling, thereby preventing the UVB-associated increase in MMP-1 and -9 expression. DLL extract also increased the expression of both superoxide dismutase 1 (SOD1) and catalase (CAT). We identified chikusetsusaponin IVa, soyasaponin Bb, and sandosaponin A as bioactive components of DLL. Although we have not yet identified the mechanisms by which these compounds reduce the effects of photoaging, we have demonstrated that chikusetsusaponin IVa, soyasaponin Bb, and sandosaponin A reduce MMP-1, MMP-9, p–c-Fos, and p–c-Jun expression, while also avoiding any cytotoxicity. We found oral administration of DLL extract effectively alleviated dorsal epidermal thickening and skin dehydration in HR-1 hairless mouse visible to UVB. DLL extract also prevents UVB-induced activation of the MAPK/AP-1 signaling pathway, thereby reducing the expression of MMPs in dorsal mouse skin. Our results indicate that chikusetsusaponin IVa, soyasaponin Bb, and sandosaponin A are bioavailable components of DLL extract that can reduce UVB-induced skin damage via MMPs by deactivating the MAPK/AP-1 signaling pathway. These findings suggest DLL extract can be used as a skin anti-photoaging agent.

Combined inorganic and organic fertilizers improved soil microbial biomass and nitrogen dynamics in Upper Eastern region of Kenya

Soil microbial biomass elements and mineralization processes are essential in replenishing soil nutrients. Yet, the effect of fertilization on the microbes is still not well-defined. This study aimed to determine the effect of integrated soil fertility inputs (inorganic and organic) on microbial biomass, carbon (MBC), nitrogen (MBN), phosphorus (MBP), nitrogen (N) mineralization, and N use efficiency in a field experiment. The treatments were: control (no fertility input), sole inorganic fertilizer, and different combinations of inorganic and organic inputs in a randomized block design. The results showed that Conventional tillage + maize residue + goat manure + Dolichos lablab intercrop (CT4); minimum tillage + maize residue + Tithonia diversifolia + goat manure (MT5); and minimum tillage + maize residue + goat manure + Dolichos lablab (MT4) intercrop increased microbial C, N, and P by 78 %, 48 %, and 41 %, respectively compared to control (CT0). Compared to CT0, N mineralization significantly varied (p < 0.0001) among the treatments at planting and on the 15th, 30th, 45th, and 60th days after planting during the 2020 short rains season. It also differed significantly (p = 0.0018, 0.0028, < 0.0001, and 0.0028,) on the 45th, 60th, 75th, 90th, and 105th days, respectively, relative to CT0 after planting during the 2021 long rains season. The CT4 had 5.11 and 52.80 kg N ha−1 higher apparent nitrogen recovery and partial factor productivity N, respectively. Similarly, MT4 greatly enhanced N apparent recovery efficiency by 57.5 % relative to CT0. Integrating fertility inputs improved soil biological fertility and mineralized N. Therefore, technologies that integrate organic inputs, either solely or with inorganic fertilizers, should be harnessed and promoted as medium and long-term technologies to advance soil biological fertility, and mineral N and N use efficiency in smallholder farmers.

A chemometric study comparing nutritional profiles and functional attributes of two botanical forms of Lablab Bean (Lablab purpureus (L.) Sweet)

Growing health awareness has stimulated a focus on natural immune enhancement. Lablab beans {Lablab purpureus (L.) Sweet}, abundant in bioactive compounds, were investigated for protein, mineral, and vitamin profiles. This research specifically conducted a comparative analysis between two distinct botanical forms: Lablab purpureus var. typicus L. and L. purpureus var. lignosus L, focusing on their nutritional profiles. Among L. purpureus var. typicus L. genotypes, RCPD-6 exhibited the highest protein content (25.46 ± 0.29 g/100 g) followed by RCPD-1 (23.74 ± 0.26 g/100 g). In contrast, L. purpureus var. lignosus L., L. purpureus var. lignosus L. particularly genotype RCPD-22, had lower protein content (19 ± 0.15 g/100 g). Significant variations in Fe content were observed within L. purpureus var. typicus L., ranging from 5.97 ± 0.01 to 10.5 ± 0.02 mg/100 g, with RCPD-2 reported the highest. Zn content ranged from 1.7 ± 0.01 to 3.65 ± 0.02 mg/100 g in both forms. The calcium content in L. purpureus var. typicus L. genotypes are found to be high, ranging from 372.72 ± 0.02 mg/100 g to 458.75 ± 0.03 mg/100 g, suggesting that var. typicus holds promise as a significant dietary source of Ca. P content exhibited variability, ranging from 317.12 ± 0.01 to 460.07 ± 0.06 mg/100 g. L. purpureus var. typicus L. shows correlated levels of protein/Zn, vitamins A/C, and antioxidant activities (DPPH/ABTS) suggesting targeted breeding for co-improved health benefits. It is noteworthy that L. purpureus var. typicus L., whose pods are consumed as vegetables, exhibits higher nutritional content in terms of protein, iron, calcium, and vitamin A. This clearly suggests that L. purpureus var. typicus L. surpasses L. purpureus var. lignosus L. in nutritional value. To strengthen findings, chemometric techniques such as principal component analysis (PCA) and agglomerative hierarchical clustering (AHC) were employed for differentiation between the two botanical forms. These methods highlight the disparities in their nutritional profiles and functional characteristics. PCA analysis demonstrated that the first three components encapsulated 80.67 % of the overall variability. Meanwhile, AHC grouped cultivars into two major clusters which can be divided into two sub-groups based on the evaluated parameters. The data obtained provide a significant contribution to the scientific evaluation of the two botanical forms of lablab bean, particularly in terms of their nutritional profiles and functional attributes.

The Effects of Maize and Napier Grass Ensiled with Dolichos Lablab on Feed Intake Growth Performance and Carcass Traits of Horro Lambs

The Effects of Maize and Napier Grass Ensiled with Dolichos Lablab on Feed Intake Growth Performance and Carcass Traits of Horro Lambs

Constituents from Dolichos lablab L. Flowers and Their Anti-Inflammatory Effects via Inhibition of IL-1β Release.

The occurrence of inflammation is closely related to the activation of the NLRP3 inflammasome. IL-1β produced during the activation of the NLRP3 inflammasome has strong pro-inflammatory activity and can also promote the release of inflammatory factors by other immune cells, exacerbating inflammatory damage to tissues. Utilizing IL-1β as the detection index to find small-molecule inhibitors targeting NLRP3 from natural products will benefit the search for drugs for inflammation-related diseases. During the exploration of anti-inflammatory active components derived from the flowers of Dolichos lablab L., an ingredient in traditional Chinese medicine with dual applications in both medicinal treatment and dietary consumption, fourteen compounds (1-14), including seven previously unreported ones, named flosdolilabnitrogenousols A-D (1-4) and flosdolilabsaponins A-C (5-7), were found. Their structures were established through extensive NMR spectra determination, HR-ESI-MS analysis, ECD calculations, and chemical reactions. Flosdolilabsaponin A (5) stands out as an exceptionally rare tetracyclic lactone oleane-type saponin. Additionally, the inhibitory activity on IL-1β release of all compounds, without cytotoxicity, was evaluated using BMDMs stimulated with LPS/Nigericin. An Elisa assay revealed that compounds 1, 8, 9, and 11-14 exhibited significant inhibition of IL-1β release at a concentration of 30 μM. Structure-activity relationships were also discussed. This study indicates that D. lablab flowers possess anti-inflammatory activity, which might exert its effect by suppressing the activation of the NLRP3 inflammasome.

Saponins from Dolichos lablab seeds with anti-inflammatory activity

As one of a traditional Chinese medicine with dual applications in both medicinal treatment and dietary consumption, the mature seeds of D. lablab were reported to be rich in saponins and have a good effect on inflammatory related diseases. However, the substance basis for its anti-inflammatory activity remains unclear. Thus, a comprehensive phytochemical investigation on triterpenoid saponins from D. lablab seeds was carried out, resulting in the isolation and identification of twenty-one new triterpenoid saponins including dolilabsaponins A1–A4, B, C, D1–D3, E–M, N1, N2 and O (1–21) along with thirteen known analogs (22–34). Notably, the known saponins, 31, 32, and 34 were obtained from Leguminosae family for the first time. The 1H and 13C NMR data of saponins 24 and 28 were firstly reported here. Additionally, lipopolysaccharide (LPS)-stimulated RAW264.7 cells model was utilized to assess inhibitory activities of compounds 1–34 on nitric oxide (NO) production. The results revealed that compounds 1–3, 9, 10, 13–15, 18, 22, 23 and 28–34 significantly suppressed the elevation of NO levels in LPS-induced RAW264.7 cells at the concentration of 30 μM, exhibiting a concentration-dependent manner at 3, 10, and 30 μM. The results suggested that compounds 1–3, 9, 10, 13–15, 18, 22, 23, and 28–34 possessed potential anti-inflammatory activity. Further western blot assay demonstrated that 1, 9, 10, 13, 14, and 18 suppressed inflammatory response via down-regulated the expression levels of inflammatory factors, tumor necrosis factor-alpha and interleukin-6.

An underutilized bean: hyacinth bean [Lablab purpureus (L.) sweet]: bioactive compounds, functional activity, and future food prospect and applications.

Hyacinth bean [Lablab purpureus (L.) Sweet], a plant belonging to the leguminous family and traditionally used for medicinal purposes in China, is a valuable resource with a wide range of health benefits. This review examines the bioactive compounds, health-promoting properties and functional food potential of hyacinth bean, highlighting its role in protecting against metabolic diseases and the underlying molecular mechanisms. According to existing research, hyacinth bean contains a diverse array of bioactive compounds, Consumption of hyacinth beans and hyacinth bean-related processed food products, as well as their use in medicines, is associated with a variety of health benefits that are increasingly favoured by the scientific community. In light of these findings, we posit that hyacinth bean holds great promise for further research and food application. © 2024 Society of Chemical Industry.

Seasonal Incidence of Spotted Pod Borer (Maruca vitrata F.) in Indian bean and Correlation with Meteorological Aspects

Aim: To study the population dynamics of spotted pod borer infesting Indian bean in relation to weather parameters Study Design: Field trail; Randomized Block Design. Place and Duration of Study: The study was conducted at College farm at Navsari Agricultural University during Rabi of 2022-23 and 2023-24. Methodology: 50 plants were randomly selected from the net plot area. The observations on the number of larvae per plant and per cent pod damage were counted. Results: The larval population, in year 2022-23 started from 51st SMW. The peak activity was observed in 4th SMW when 6.46 larvae/plant population was recorded which coincided with the peak flowering stage. During the second season (year 2023-24) also, the pest population started from 51st SMW with pest population of 0.8 larvae/plant. The peak pest population was observed on 4th SMW with 6.84 larvae/plant. The pod damage started from 2nd SMW with 10.05 per cent and gradually increased. The peak was recorded in 12th SMW, highest pod damage was observed with 55.89 per cent. Similar to previous year, the pod damage was recorded from 2nd SMW with 11.67 per cent and peak was seen in 8th SMW with 56.63 per cent damage. The correlation of number of larvae per plant with maximum (r=-0.63), minimum (r=-0.62), average temperature (r=-0.74) and average vapour pressure (r=-0.59) showed significantly negative correlation. During year 2023-24, minimum (r=-0.637) and average temperature (r=-0.610) showed significant negative correlation. In case of pod damage, it was revealed that maximum temperature (r=0.58) and bright sunshine hours (BSSH) (r=0.59) exhibited significant positive correlation with pod damage per cent, in year 2022-23. A similar trend was seen in year 2023-24 where, maximum temperature (r=0.692) and BSSH (r=0.787) showed significant positive correlation. Conclusion: Temperature and to some extent vapour pressure plays a significant role in the population fluctuation of spotted pod borer in Indian bean.

Studies on Seasonal Influence on Yield and Quality of Dolichos Bean Genotypes

Background: Dolichos bean [Dolichos lablab (Roxb.) (L) Var. typicus] is one of the most important leguminous vegetable crops cultivated in tropical plains of India. The mature and immature pods are rich in protein, minerals and vitamins. Most of the pole types of dolichos beans are photosensitive in nature, suited for growing in specific season like kharif and not productive when grown in summer season. Different cultivars of Dolichos bean require different seasons for getting maximum yield. With this background, studies on seasonal influence on growth and yield of dolichos bean genotypes were carried out. Methods: An experiment was conducted to assess the effect of season and genotypes in Dolichos bean. The experiment was laid out in factorial randomized block design with nine treatment combinations and four replications. In this study, three genotypes of dolichos bean viz., CO 1, Dbp-3 and Dbp-4 were sown during kharif, rabi and winter seasons. Result: The main and interaction effects on genotypes and season of sowing had a significant influence on green pod yield, crude fibre, crude protein and total dry matter production. The genotype Dbp-3 sown during kharif season recorded the highest values for green pod yield (23.43 t.ha-1), crude protein (5.99%), dry matter production at various stages of growth (65.9, 254.3, 305.8, 359.2, 389.8 and 418.0 g.plant-1 at 30, 60,90,120,150,180 days after sowing respectively) and it was significantly different from all other treatments. The same treatment i.e., genotype Dbp-3 sown during kharif season was recorded the lowest amount of crude fibre content (1.53%).