Journal of Agronomy and Crop Science最新文献

{"title":"Impact of Saline Water Irrigation on Soil Carbon Pool Composition and the Response of Carbon Emissions to Water Regulation","authors":"Yuanyuan Wang,&nbsp;Junpeng Zhang,&nbsp;Yang Gao,&nbsp;Yuanyuan Fu,&nbsp;Shoutian Ma,&nbsp;Anqi Zhang","doi":"10.1111/jac.70120","DOIUrl":"10.1111/jac.70120","url":null,"abstract":"<div>\u0000 \u0000 <p>In areas with freshwater resource shortages, although saline water irrigation can alleviate agricultural water-use pressure, long-term application may lead to soil salinisation and ecological function degradation, thereby affecting greenhouse gas emissions. To clarify its influence on the soil carbon cycle and greenhouse gas emissions, this study collected farmland soil subjected to long-term saline water irrigation (S1: 1 g/L, S2: 4 g/L, and S3: 8 g/L) and analysed the dynamic changes in CO₂ emissions and carbon and nitrogen components through controlled indoor experiments. The soil moisture gradient was defined as follows: W1, W2, and W3 correspond to 45%, 60%, and 75% of the field water-holding capacity, respectively. The results indicated that soil total carbon and total nitrogen decreased over time and were more strongly affected by salinity than by moisture, with both parameters peaking at a salinity level of S2. Both dissolved organic carbon and microbial biomass (microbial biomass carbon, microbial biomass nitrogen) responded distinctly to moisture and salinity: dissolved organic carbon decreased initially and then increased as the salinity increased (S3 &gt; S1 &gt; S2), but it consistently decreased with increasing soil moisture (W1 &gt; W2 &gt; W3), while microbial biomass carbon and microbial biomass nitrogen rose as the soil moisture increased (W3 &gt; W2 &gt; W1). Microbial biomass nitrogen demonstrated higher salt tolerance than carbon biomass, peaking at S2, whereas microbial biomass carbon declined with rising salinity (S1 &gt; S2 &gt; S3). Soil moisture and salinity significantly influenced CO₂ emissions. CO₂ levels increased with rising soil moisture (W3 &gt; W2 &gt; W1). Moderate salinity promoted CO₂ emissions, whereas high salinity suppressed them (S2 &gt; S1 &gt; S3). Compared to the W3S2 treatment, which showed the maximum value (<i>p &lt; 0.05</i>), CO₂ emissions were reduced by 13.84% in W3S1, 24.85% in W3S3, 33.63% in W1S2, and 20.54% in W2S2. These results recommend controlling irrigation salinity at ≤ 4 g/L and maintaining water content at 60%–75% of the water holding capacity to synergistically sustain soil health and emission reduction benefits.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"211 6","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145203752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Field-Based Portable Heat Chambers for the Determination of Day-Time Heat Stress in Canola (Brassica napus L.)","authors":"Rajneet Uppal,&nbsp;Maheswaran Rohan,&nbsp;Rohan Brill,&nbsp;John Bromfield","doi":"10.1111/jac.70119","DOIUrl":"https://doi.org/10.1111/jac.70119","url":null,"abstract":"<p>To cope with future changing climates, it is paramount to not only breed for heat-tolerant germplasm but also test the heat tolerance of crops in reliable field-based experiments for commercial adoption of the research. There is little published research assessing the day-time heat stress in canola during the optimal growing period under field conditions. Additionally, the impact of heat stress and its interaction with water availability at critical reproductive growth stages appears severely understudied in field experiments. Therefore, a novel system for simulating heat stress was specifically developed and tested for canola plots. Eight portable heat chambers were constructed with clear polycarbonate sheets, fitted with two fan heaters and a ceiling fan that were controlled by a commercial thermostat. Heat stress of 33°C was simulated as heat waves for the eight-day period during key reproductive stages (start of flowering, mid-flowering, end of flowering, and late-podding). The heating system was able to elevate and maintain high temperature consistently across water regimes, validating the system's successful imposition of heat stress. The impact of heat stress was confirmed through a statistically significant plot grain yield reduction that was associated with a reduction in total pods, fertile pods, and seed number. Averaged across different water regimes, heat stress at advanced reproductive developmental stages resulted in grain yield reduction ranging from 39.9% at mid-flowering to 56.2% at the end of flowering compared to the non-stressed control. While the system and methodology developed are successful in canola heat tolerance breeding programs, there is potential that this methodology is scalable to other crops or plants.</p>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"211 6","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jac.70119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimising the Morphology and Quality of Basal Stem Nodes to Improve Wheat Lodging Resistance and Yield","authors":"J. C. Zhang,&nbsp;Y. Q. Zhang,&nbsp;Q. J. Xu,&nbsp;J. J. Lei,&nbsp;C. X. Chen,&nbsp;J. Li,&nbsp;S. H. Nie,&nbsp;J. Li,&nbsp;X. H. Chang,&nbsp;W. X. Xu","doi":"10.1111/jac.70118","DOIUrl":"https://doi.org/10.1111/jac.70118","url":null,"abstract":"<div>\u0000 \u0000 <p>Lodging is one of the main limiting factors threatening crop yields. Although the technology to modify plant morphology and improve lodging resistance using plant growth regulators (PGRs) is well developed, the understanding of the effects and underlying mechanisms of PGRs in regulating stem traits at different growth stages of wheat remains limited. In this study, two cultivars, Shidong 0358 (SD0358, a lodging resistant cultivar) and Xindong 18 (XD18, a lodging-sensitive cultivar), were used to investigate the effects of chlorocholine chloride (CCC) and gibberellin (GA₃) treatment on wheat stem characteristics, lodging resistance, lignin and cellulose biosynthesis processes and yield during the jointing and booting stages. The results showed that in the lodging-sensitive cultivar (XD18), exogenous CCC treatment (CC) at the jointing and booting stages shortened the second basal internode during the flowering and filling stages, while increasing lignin and hemicellulose content, stem breakage strength and stem lodging resistance index, resulting in a decrease in wheat lodging rate and an increase in total yield, compared with CK. However, exogenous CCC and GA₃ (CG) treatments during the jointing and booting stages increased the height of the gravity centre of wheat, reduced the activity of 4-Coumaroyl-CoA and Cinnamyl Alcohol Dehydrogenase, resulting in a decrease in cellulose and hemicellulose content, thereby increasing lodging rate. Meanwhile, under CC treatment, the lodging-resistant cultivar (SD0358) showed enhanced stem breakage strength and enhanced yield with advantageous lignin biosynthesis ability. Interestingly, compared to CC, CG treatment showed an increase in cellulose and hemicellulose content in the stem of SD0358 and a further increase in final yield. Overall, the application of CCC during the jointing and booting stages improved stem morphology and quality, thereby enhancing lodging resistance and final grain yield, especially in lodging-sensitive cultivars. The combined strategy of applying CCC during the jointing stage and GA₃ during the booting stage is an effective chemical regulation method to balance lodging resistance and yield potential in lodging-resistant cultivars.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"211 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Seedling-Water Irrigation Levels on Rhizosphere Environment and Root Differentiation in Sweet Potato (Ipomoea batatas) in the Rooting and Branching Period","authors":"Mingjing Zhou,&nbsp;Shihao Huang,&nbsp;Qing Liu,&nbsp;Shaoxia Wang,&nbsp;Mingku Zhu,&nbsp;Chaoyu Song,&nbsp;Tao Yin,&nbsp;Huan Li","doi":"10.1111/jac.70117","DOIUrl":"https://doi.org/10.1111/jac.70117","url":null,"abstract":"<div>\u0000 \u0000 <p>Seedling-water can effectively ensure the survival of sweet potato seedlings after transplanting. However, improper irrigation of acclimation water can lead to an uncoordinated rhizosphere environment, negatively affecting the formation of storage roots. We conducted field experiments to assess the effects of three seedling-water irrigation treatments on sweet potato root differentiation, monitoring soil water content (SWC), O₂ and CO₂ concentrations, and temperature at 0–30 cm depths, while measuring the expression of genes related to sweet potato root differentiation, shoot biomass, the number of storage roots per plant (NSRPP), and yield. The results indicated that the moderate irrigation treatment (W2) significantly increased NSRPP and yield compared to the insufficient irrigation treatment (W1) and excessive irrigation (W3). Specifically, NSRPP for W2 increased by 48.9% (2022) and 73.2% (2023) relative to W1, and by 12.7% (2022) and 14.1% (2023) compared to W3. Similarly, yield improved by 43.1% (2022) and 32.3% (2023) compared to W1, and by 11.0% (2022) and 23.8% (2023) compared to W3. Correlation analysis revealed that NSRPP is positively correlated with the expression levels of cambium-related genes <i>(IbSRD1</i> and <i>IbNAC083</i>), while it is negatively correlated with the expression levels of xylem-related genes (<i>IbCAD1</i>, <i>IbEXP1</i> and <i>IbPAL1</i>). PLS-SEM analysis indicated that soil SWC and soil CO₂ concentrations significantly influenced NSRPP, whereas temperature and soil O₂ concentrations had no significant effect. Multivariate analyses of SWC, soil CO₂ concentrations, and NSRPP revealed that the optimal amount of irrigation ranges from 112.2 to 209.5 m³ hm⁻². These conditions ensured that water, gas, and heat conditions in the rhizosphere are maintained within a range conducive to root differentiation, ensuring that a greater proportion of root differentiation events develop into storage roots. The findings of this study will provide practical guidance for water management during the rooting and branching periods of sweet potatoes.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"211 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144929530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seed Priming in Legume Crops: Mechanisms, Applications and Future Directions for Enhanced Germination, Growth and Abiotic Stress Tolerance in Sustainable Agriculture: A Review","authors":"Siyabonga Ntshalintshali,&nbsp;Sanele Goodenough Pecevierence Sibiya,&nbsp;Ntombifuthi Mabuza,&nbsp;Mbukeni Nkomo,&nbsp;Lungelo Given Buthelezi","doi":"10.1111/jac.70115","DOIUrl":"https://doi.org/10.1111/jac.70115","url":null,"abstract":"<p>Legume crops, essential for global agriculture due to their high nutritional value and nitrogen-fixing ability, often face significant yield reductions from environmental stresses like salinity, drought and extreme temperatures. Seed priming has emerged as a promising pre-sowing strategy to improve seed vigour, stress tolerance and overall crop performance. Despite numerous studies exploring different seed priming techniques, including hydropriming, osmo-priming, halo-priming and bio-priming, there is a lack of consolidated insights on their comparative effectiveness across legume species. This review aims to fill that gap by evaluating the mechanisms through which seed priming enhances germination, plant growth and yield under stress conditions. By highlighting key findings and identifying gaps in the current research, this review outlines the importance of optimising seed priming protocols tailored to specific legume species and stress conditions. Advancing research in field settings and prioritising underutilised legume species is essential to strengthen global food security in the context of climate change. These efforts directly support Sustainable Development Goal 2: Zero Hunger, by promoting resilient agricultural systems and improving the availability of nutritious food.</p>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"211 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jac.70115","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Amelioration of Salinity Stress in Chickpea (Cicer arietinum L.) Cultivars Through Foliar Spray of Proline and Glycine Betaine","authors":"Rikina Choudhury,&nbsp;Amantika Singh,&nbsp;Krishna Kumar Choudhary","doi":"10.1111/jac.70116","DOIUrl":"https://doi.org/10.1111/jac.70116","url":null,"abstract":"<div>\u0000 \u0000 <p>Chickpea is an economically important legume that is susceptible to various abiotic stresses, including salinity. The intrinsic stress tolerance mechanisms in chickpea are effective under mild conditions but are compromised under severe stress. The present study evaluated the impact of 50 and 100 mM NaCl-induced salinity stress for two chickpea cultivars (PDG4 and GPF2) along with the ameliorative potential of 50 mM proline and Glycine betaine (GB) foliar spray. A comprehensive assessment was conducted encompassing growth and biomass traits, relative leaf water content, photosynthetic pigments, membrane stability, reactive oxygen species (H₂O₂, ^•O₂⁻), total protein, phenolic and flavonoid content, as well as antioxidant enzyme activities (SOD, CAT, APX). Salinity stress of 50 and 100 mM decreased the total biomass accumulation by 23.3% and 26.2% in PDG4, and 27% and 33.7% in GPF2, respectively. Foliar application of proline significantly improved the biomass by 7.6% in PDG4 and 8.7% in GPF2 under 50 mM as compared to control. Similarly, proline and GB application enhanced SOD activity by 42.7% and 27.7% in PDG4, and by 51% and 41.1% in GPF2 under 50 mM of salinity stress. CAT followed a similar trend as SOD, while APX exhibited an opposite pattern. Notably, PDG4 displayed higher resilience under both stress levels, and proline was more effective than GB in mitigating stress effects, as further supported by correlation matrices, heatmap clustering, and PCA. These findings underscore the potentiality of compatible solutes, particularly proline, in enhancing salinity tolerance in chickpea and offer promising strategies for sustainable crop management in salt-affected soils.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"211 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coronatine Improves Water Productivity of Maize (Zea mays L.) Under Deficient Irrigation in Northwest Arid Region of China","authors":"Tianyu Feng,&nbsp;Qing Guo,&nbsp;Yingru Liu,&nbsp;Guanmin Huang,&nbsp;Yuling Guo,&nbsp;Mingcai Zhang,&nbsp;Yuyi Zhou,&nbsp;Liusheng Duan","doi":"10.1111/jac.70114","DOIUrl":"https://doi.org/10.1111/jac.70114","url":null,"abstract":"<div>\u0000 \u0000 <p>Maize (<i>Zea mays</i> L.) production and yield are threatened by water deficit in the arid and semiarid areas of China. Improving water productivity (WP_c) through innovative approaches is crucial for developing water-saving agricultural systems. Coronatine (COR) is a natural phytotoxin known to elicit plant resistance responses to biotic and abiotic stress. The aim of this study was to evaluate the effect of COR in alleviating the adverse effects of drought stress on maize growth and development. A field experiment with four treatments (I100, water applied under normal irrigation; I50, water applied under deficit irrigation; I50-0.1, 0.1 μmol L⁻¹ COR applied under deficit irrigation; I50-1.0, 1.0 μmol L⁻¹ COR applied under deficit irrigation) was implemented in the arid regions of northwest China. The results showed that deficit irrigation reduced the 2-year average yield by 10.8%. Under drought conditions, COR enhanced drought tolerance by sustaining photosynthetic efficiency, ultimately improving WP_c and yield in maize. Notably, COR application at 1.0 μmol L⁻¹ demonstrated superior efficacy in enhancing drought tolerance compared to other concentrations. The maize plants treated with 1.0 μmol L⁻¹ COR improved the 2-year average yield by 6.0% and WP_c by 17.9%, and decreased evapotranspiration by 10.0% compared to untreated control plants under deficit irrigation. These results highlight COR's potential as a water-saving agrochemical for semi-arid maize cultivation, providing a viable strategy to balance yield maintenance with limited water resources.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"211 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Differences in the Metabolic Response to Osmotic Stress Between Triticum aestivum L. and Two Ecologically Disparate Aegilops biuncialis Vis. Genotypes Differing in Drought Tolerance","authors":"Kristóf Jobbágy,&nbsp;Kalpita Singh,&nbsp;Kitti Kulman,&nbsp;Gabriella Szalai,&nbsp;Magda Pál,&nbsp;István Molnár,&nbsp;Sanjib Kumar Panda,&nbsp;Gábor Kocsy,&nbsp;Zsolt Gulyás","doi":"10.1111/jac.70110","DOIUrl":"https://doi.org/10.1111/jac.70110","url":null,"abstract":"<div>\u0000 \u0000 <p>Drought-induced osmotic stress reduces the growth and yield of bread wheat (<i>Triticum aestivum</i> L.) worldwide. Several genotypes of its wild relative, goatgrass (<i>Aegilops biuncialis</i> Vis.) are often tolerant to environmental stresses and used as a gene source for wheat improvement. The <i>Aegilops</i> accessions <i>Ae.b</i>. 382 and <i>Ae.b</i>. 642 collected from contrasted agroecological habitats may represent different defence mechanisms to osmotic stress compared to three bread wheat genotypes with various drought tolerances. The effect of a 1-week 15% polyethylene glycol (PEG) treatment on various physiological and biochemical parameters was compared at the 2-leaf stage. The osmotic stress-induced reduction in shoot length and fresh weight in all genotypes except for <i>Ae.b. 382</i>. This tolerance of <i>Ae.b</i>. 382 can derive from the greater PEG-induced accumulation of the antioxidant hydroxymethyl-glutathione in the shoots compared to other genotypes. It is due to an elevated synthesis of its precursors, cysteine and gamma-glutamylcysteine. In addition, the level of oxidative stress was smaller in <i>Aegilops biuncialis</i> genotypes, shown by the decrease in H₂O₂ and GSSG levels in roots and shoots, respectively. The amount of gamma-glutamylcysteine was greater in their roots than in the wheat genotypes. Furthermore, PEG treatment resulted in a greater level of putrescine, as well as the expression of defence-related genes encoding Glutathione Reductase (GR), cold-regulated protein Wcor and DihydroFlavonol-4-Reductase (DFR) in the shoots of both <i>Aegilops</i> accessions compared to the three wheat genotypes. Based on these differences, certain <i>Aegilops</i> genotypes may serve as a genetic source for the improvement of the stress tolerance of bread wheat.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"211 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144833262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prioritising D-Value in Multivariate Evaluation Identifies High-Yield and Drought-Resistant Cotton Genotypes","authors":"Jinglin Li,&nbsp;Ruihua Liu,&nbsp;Shaodong Liu,&nbsp;Guo Zhigang,&nbsp;Huijuan Ma,&nbsp;Qian Shen,&nbsp;Siping Zhang,&nbsp;Changwei Ge,&nbsp;Chaoyou Pang","doi":"10.1111/jac.70113","DOIUrl":"https://doi.org/10.1111/jac.70113","url":null,"abstract":"<div>\u0000 \u0000 <p>In order to screen out agronomic traits closely related to drought resistance of cotton, seven agronomic traits were measured, including morphological traits: plant height (PH), first vegetative shoot length of single plant (FVSL) and all vegetative shoot length of single plant (AVSL), and yield traits: boll number (BN), single boll weight (SBW), lint percentage (LP) and seed cotton yield (SCY). All agronomic traits were significantly affected by drought stress, and the morphological traits were significantly correlated, while the yield traits were opposite. Among them, the plant height and seed cotton yield were closely related to drought resistance of cotton. Comprehensive drought resistance coefficient (CDC), comprehensive drought resistance comprehensive evaluation value (<i>D</i>) and weighted drought resistance coefficient (WDC) value are the three comprehensive evaluation indexes of drought resistance. This study is the first to systematically validate that the <i>D</i> value is more scientific to reflect the differences between various agronomic traits and drought resistance of cotton than the CDC value and WDC value. Among the 199 cotton genotypes, there were large differences in drought resistance, and by using cluster analysis, they were divided into five groups: high drought resistance, drought resistance, medium drought resistance, drought-sensitive and high drought sensitivity groups. Four cotton genotypes with high drought resistance were selected; UC072 and UC002 can be widely used as drought resistant genotypes with high yield.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"211 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing Water Stress Dynamics in Kenaf (Hibiscus cannabinus L.) Through the Crop Water Stress Index and Physiological Parameters","authors":"Ali Kaan Yetik,&nbsp;Burak Nazmi Candoğan,&nbsp;Mehmet Sincik,&nbsp;Ali Osman Demir,&nbsp;Hakan Büyükcangaz","doi":"10.1111/jac.70112","DOIUrl":"https://doi.org/10.1111/jac.70112","url":null,"abstract":"<p>The effect of water stress in kenaf was studied using the Crop Water Stress Index (CWSI). Relationships of the CWSI with various physiological parameters under different irrigation levels were determined. Field trials were conducted over 2 years under sub-humid climate conditions using a randomised block design with four irrigation treatments on the basis of soil water depletion. Physiological measurements including leaf water potential (LWP), chlorophyll reading (CR), leaf area index (LAI), net photosynthesis rate (A) and stomatal conductance (gs) were recorded throughout the growing seasons. Results showed significant variations in CWSI values among irrigation treatments, with a recommended threshold of 0.15 for optimal irrigation timing. Irrigation significantly affected LWP, CR, LAI, A and gs in each year, at the <i>p</i> &lt; 0.01 level. Correlation analyses revealed strong relationships between CWSI and physiological parameters, indicating its potential to predict changes in plant physiology and dry matter yield of kenaf under water stress conditions. The study highlights the importance of optimising irrigation on the basis of CWSI to enhance crop resilience and productivity. By leveraging CWSI as a predictive tool, farmers can make informed decisions regarding crop physiology, irrigation timing and water management strategies to mitigate water stress and improve kenaf yield in a sustainable manner.</p>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"211 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jac.70112","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144811195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}