Journal of Agronomy and Crop Science最新文献

{"title":"A Holistic Approach to the Selection of Soybean (Glycine max) Cultivars for Shade Environments Based on Morphological, Yield and Genetic Traits","authors":"Wellington Ferreira Campos,&nbsp;João Paulo Ribeiro Leite,&nbsp;Fábio Santos Matos,&nbsp;Leonardo Barros Dobbss,&nbsp;Alessandro Nicoli,&nbsp;Anderson Barbosa Evaristo","doi":"10.1111/jac.12759","DOIUrl":"https://doi.org/10.1111/jac.12759","url":null,"abstract":"<div>\u0000 \u0000 <p>The reduction of photosynthetically active radiation impacts the growth and productivity of soybean in agroforestry and intercropping systems. Thus, this report explored the responses of 16 soybean cultivars submitted to shade levels in field conditions. Multi-faceted and relative importance analyses revealed that the steam diameter and plant height are fundamental morphological markers for selecting shade-resilient cultivars, both were high and positively correlated to yield components. Moreover, the responses to shade varied among soybean cultivars, with certain genotypes demonstrating distinct tolerance levels, which allowed also the estimative of genetic variance that revealed strong participation of genetic components in responses to shade. Multivariate and clustering analysis using steam diameter and plant height in combination with two yield components resulted in the identification of four soybean cultivars more tolerant to shade environments and two sensible. Therefore, this report provides insights into soybean cultivation under varying light conditions, provides a robust foundation for the integration of morphological and yield markers in breeding programmes focused on shade tolerance and guides future endeavours in crop improvement for optimal and sustainable yield and resilience in the climate change context.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"210 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142234982","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":"Role of Smart Agriculture Techniques in Food Security: A Systematic Review","authors":"Tanveer Ahmad,&nbsp;Samreen Ahsan,&nbsp;Muhammad Adil Farooq,&nbsp;Muhammad Gulzar,&nbsp;Mubashir Mubben,&nbsp;Ashiq Hussain,&nbsp;Adnan Ahmed,&nbsp;Afifa Asif,&nbsp;Samina Kauser,&nbsp;Ayesha Najam,&nbsp; Sidrah,&nbsp;Nida Firdous","doi":"10.1111/jac.12758","DOIUrl":"https://doi.org/10.1111/jac.12758","url":null,"abstract":"<div>\u0000 \u0000 <p>Agriculture plays an important part in the overall growth and development of a nation. Concerns about agriculture continue to be a recalcitrant obstacle in the path of upward movement. Although agricultural yields are increased, however, low- and middle-income countries still have difficulty in producing all of the required foods with the current state of agricultural technology. Smart agriculture is becoming increasingly important to the farmers as a means of ensuring optimal field growth and higher crop yield. This systematic study analysed and briefly explained the effects of using smart agriculture techniques (SATs) from a variety of countries, including China, the United States of America, Australia, India, the Philippine Islands, South Africa, Pakistan and Iran, among others. Increased climatic change resulting in abiotic stress and other harmful effects on plants have resulted in decreased productivity under traditional agricultural practices. Stats from the literature have shown that the launching of SATs has resulted in a significant increase in cotton–wheat and rice–wheat crop yields, resultantly increased incomes of the farmers. Application of SATs, including satellite remote sensing, drones, machine learning and image processing, monitoring, wireless sensor networks, IoT–based robotics, precision agriculture and agroforestry could be extremely useful in developing intelligent agricultural systems in underdeveloped and developing countries, with improved plant growth, high crop yield and ensuring food security. These technologies could help farmers by storing additional water, spraying pesticides with drones, practicing precision agriculture and employing sensors for assessing different environmental parameters. By making efficient use of these technologies, countries could be able to increase the yield of their crops, which, in turn, will contribute to the reduction of poverty and the elimination of food insecurity.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"210 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142234716","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":"Distinguishing High Daytime From Nighttime Temperature Effects During Early Vegetative Growth in Cotton","authors":"Ved Parkash,&nbsp;John Snider,&nbsp;Kelvin Jimmy Awori,&nbsp;Jhansy Reddy Katta,&nbsp;Cristiane Pilon,&nbsp;Viktor Tishchenko","doi":"10.1111/jac.12757","DOIUrl":"https://doi.org/10.1111/jac.12757","url":null,"abstract":"<p>High-temperature limits early season vegetative growth of cotton, and the physiological response of cotton (<i>Gossypium hirsutum</i> L.) to high daytime or nighttime temperature needs to be explored. The objectives of the current study were to determine (1) plant growth response, (2) physiological contributors to variation in biomass production and (3) mechanisms driving variation in net photosynthetic rate (<i>A</i>_N) in response to different combinations of high daytime and nighttime temperatures. Beginning at planting, cotton was exposed to four different growth temperature regimes: (1) optimum (30/20°C day/night), (2) high nighttime (30/30°C), (3) high daytime (40/20°C) and combined high daytime and nighttime (40/30°C) for 4 weeks. Relative to the 30/20°C treatment, plant growth was positively affected by high nighttime temperature and negatively affected by high daytime temperature and combined high day and night temperature. Increased leaf area mainly contributed to increased biomass production in high nighttime temperature; higher nighttime respiration (<i>R</i>_N) drove reductions in biomass in combined high daytime and nighttime temperature; and decreased leaf area and <i>A</i>_N and increased <i>R</i>_N drove reductions in biomass under high daytime temperature alone. <i>A</i>_N was not impacted by high nighttime temperature, while decreased under high daytime temperature and increased with combined high daytime and nighttime temperature. Adjustments in leaf traits contributed to increases in <i>A</i>_N in combined high daytime and nighttime temperature, and increased photorespiration and respiration contributed to reductions in <i>A</i>_N under high daytime temperature. Overall, early season vegetative growth of cotton exhibited differential responses to high daytime and nighttime temperatures.</p>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"210 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jac.12757","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142234713","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":"Unravelling Morpho-Physiological Mechanism and Candidate Genes Associated With Salinity Tolerance in Superior Haplotypes of Barley (Hordeum vulgare L.)","authors":"Sonia Singh,&nbsp;Shashank Kumar Yadav,&nbsp;Sunder Singh Arya,&nbsp;Sherry R. Jacob,&nbsp;Raj Kumar Gautam,&nbsp;Gyanendra Pratap Singh,&nbsp;Vikender Kaur","doi":"10.1111/jac.12756","DOIUrl":"https://doi.org/10.1111/jac.12756","url":null,"abstract":"<div>\u0000 \u0000 <p>The lack of suitable genetic resources for saline regions and the complexity of the traits involved impede the progress in crop breeding for salt tolerance. The present investigation was carried out using 27 diverse barley genotypes chosen based on the assessment of salt tolerance potential within the barley mini-core collection at the National Genebank of India. The genotypes were exposed to salinity stress (200 mM NaCl) and were examined for morpho-agronomic, physiological traits and salt uptake parameters. Exposure to salt stress resulted in a significant decline in all parameters ranging from 5.94% in relative water content to 80.04% in shoot K⁺/Na⁺ ratio compared to the control in the evaluated accessions. Moreover, the grain yield and its key attribute hundred-grain weight decreased substantially by 65.35% and 48.62%, respectively, under saline treatment. The majority of the resilient accessions managed to uphold a higher K⁺/Na⁺ ratio ranging from 0.51 in EC0578359 to 1.19 EC0578251 in contrast to vulnerable germplasm (&lt;0.56) under saline circumstances. The analysis of haplotype variants disclosed allelic diversity linked with two promising candidate genes, <i>HVA1</i> and <i>HvHKT2</i>, recognised for conferring salt tolerance. Examination of nucleotide sequences revealed that the <i>HVA1</i> remained considerably conserved among the evaluated genotypes as the majority of the SNPs (single-nucleotide polymorphisms) were synonymous. Conversely, for <i>HvHKT2</i>, a significant level of genetic variation led to the identification of two primary haplotypic clusters—Hap1 associated with sensitivity to salinity and Hap2 linked with tolerant traits. Hap2 predominantly consisted of In/Dels which caused a modification in the overall protein length alongside the phospho-variant allelic form of the <i>HKT2</i> gene, further enhancing the biological specificity and functional stress response in a spatiotemporal fashion. These haplotype clusters correlated with favourable traits could be utilised for trait integration into breeding populations, thereby expediting the enhancement of superior salt-tolerant barley cultivars.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"210 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142234940","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":"Biological Nitrogen Fixation for Sustainable Agriculture Development Under Climate Change–New Insights From a Meta-Analysis","authors":"Abu Zar Ghafoor,&nbsp;Hafiz Hassan Javed,&nbsp;Hassan Karim,&nbsp;Marcin Studnicki,&nbsp;Ijaz Ali,&nbsp;Hu Yue,&nbsp;Peng Xiao,&nbsp;Muhammad Ahsan Asghar,&nbsp;Christopher Brock,&nbsp;Yongcheng Wu","doi":"10.1111/jac.12754","DOIUrl":"10.1111/jac.12754","url":null,"abstract":"<div>\u0000 \u0000 <p>Biological nitrogen fixation (BNF) in legume crops is a crucial ecosystem service that enhances soil nitrogen and reduces the need for chemical fertilisers. This study evaluates the factors influencing the proportion of plant nitrogen derived from atmospheric fixation (Ndfa) in legume crops. We compiled a global dataset spanning from 1980 to 2018 and used the ¹⁵N method to assess the impacts of crop species, climatic conditions, stand composition and nitrogen fertilisation on Ndfa. The global meta-analysis reveals that the percentage of nitrogen derived from atmospheric fixation (Ndfa) in legumes ranges from 5% to 99%, with an average of 68%. Fodder legumes exhibited higher Ndfa, averaging 75%, while grain legumes showed more variability, ranging from 38% to 85%, depending on species and climatic conditions. The significant variability in Ndfa underscores the complexity of the process, which is influenced by species-specific traits, ecological conditions and competition in mixed stands. However, the current data is insufficient for precise Ndfa estimation in nitrogen balances and decision support tools. The study highlights the need for further research on the impact of nitrogen fertilisation and stand composition on Ndfa. These findings emphasise the potential of BNF to support sustainable agriculture by improving nitrogen availability and reducing dependence on synthetic fertilisers and particularly susceptibility to climate change challenges. To optimise the benefits of BNF, future research should focus on refining fertilisation regimes and exploring species-specific responses to various ecological conditions. Exploring adaptive strategies, like selecting drought-tolerant legumes and optimising irrigation, is essential. This will enhance the application of BNF in diverse agricultural systems, contributing to more sustainable and efficient farming practices.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"210 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142144330","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":"Nitrogen Fertilisation and Seed Rate Regulation Improved Photosynthesis, Grain Yield and Water Use Efficiency of Winter Wheat (Triticum aestivum L.) Under Ridge–Furrow Cropping","authors":"Yulong Dai,&nbsp;Zhenqi Liao,&nbsp;Shengzhao Pei,&nbsp;Zhenlin Lai,&nbsp;Bin Liao,&nbsp;Zhijun Li,&nbsp;Junliang Fan,&nbsp;Yuanlai Cui","doi":"10.1111/jac.12749","DOIUrl":"10.1111/jac.12749","url":null,"abstract":"<div>\u0000 \u0000 <p>Ridge–furrow cropping patterns, nitrogen fertilisation and seed rate regulation are popular management strategies for improving crop yields in the semi-arid areas of Northwest China, but their interactive effects on grain yield and water use efficiency remain poorly understood. In 2020–2021 and 2021–2022, a two-season field experiment was conducted on winter wheat. There were two cropping patterns (C), ridge–furrow cropping with film mulch (RC) and traditional cropping without mulch (TC), two nitrogen fertilisation rates (N), 0 and 200 kg N ha⁻¹ (N₀ and N₁) and three seed rates (S), 240, 360 and 480 plants m⁻² (S₁, S₂ and S₃). The study was conducted in a split–split design with three replications (randomised blocks) and a total of 24 experimental plots. It was found that the interactive effects of C × N, C × S and N × S were significant on soil temperature (ST), leaf area index (LAI), relative chlorophyll content (SPAD), photosynthetic parameters, grain yield (GY) and water use efficiency (WUE) (<i>p</i> &lt; 0.05), while C × N × S was significant only for LAI, aboveground biomass (AGB), GY and WUE (<i>p</i> &lt; 0.05). Compared with TC and N₀, RC and N₁ significantly increased SPAD value (2.4% and 15.8%), net photosynthetic rate (<i>P</i>_n) (19.8% and 32.8%), net photosynthetic rate (<i>P</i>_n), transpiration rate (<i>T</i>_r) (7.0% and 15.7%) and the effective PSII quantum production (ΦPSII) (10.7% and 5.0%). The highest GY (6773 kg ha⁻¹ over 2020–2021 and 8036 kg ha⁻¹ over 2021–2022) and WUE (20.03 kg ha⁻¹ mm⁻¹ over 2020–2021, and 21.77 kg ha⁻¹ mm⁻¹ over 2021–2022) of winter wheat were observed under RC + N₁ + S₂. The findings showed that the RC cropping pattern with fertilisation and seed rate regulation (360 plants m⁻²) of winter wheat, which is appropriate for ensuring the long-term sustainability of agricultural production in the semi-arid regions of Northwest China, enhanced plant growth, photosynthetic traits, yield and water use efficiency. The study might give useful information for enhancing the productivity and water use efficiency of winter wheat in this and other similar climate locations.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"210 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142144250","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":"Response of Antioxidant Enzymes of Winter Wheat (Triticum aestivum L.) to Shallow and Saline Groundwater Depths","authors":"Mehmet Sait Kiremit,&nbsp;Hakan Arslan","doi":"10.1111/jac.12752","DOIUrl":"https://doi.org/10.1111/jac.12752","url":null,"abstract":"<div>\u0000 \u0000 <p>Antioxidant enzymes in plants are critical for protection against oxidative stress and for the overall health and resilience of plant systems. However, antioxidant responses of plants grown in shallow and saline groundwater are poorly understood. Therefore, understanding the biochemical responses of plants to shallow groundwater significantly affects food security and environmental conservation. With this aim, the present work was carried out for 2 years in drainable lysimeters to assess the effects of four different groundwater salinities (0.38, 2.0, 4.0 and 8.0 dS m⁻¹) on the temporal changes in antioxidant enzymatic activity in wheat plants under three different groundwater depths (30, 55 and 80 cm). Superoxide dismutase (SOD), glutathione S-transferase (GST) and catalase (CAT) activities varied significantly based on groundwater depth and salinity. CAT and GST enzyme levels increased curvilinearly with rising groundwater depth and salinity. Conversely, the GR enzyme activity showed no significant change with groundwater depths but increased linearly with higher salinity. SOD enzyme activity notably increased at a groundwater depth of 30 cm but decreased at a depth of 80 cm. Moreover, the peak activity of the GR enzyme was observed at a 6 dS m⁻¹ groundwater salinity under groundwater depths. Additionally, the GST and CAT enzyme activities were inhibited more when the groundwater depth was &lt;55 cm and the groundwater salinity was &gt;4.20 dS m⁻¹. Finally, identifying the peak levels of antioxidant enzymes could potentially serve as an indicator for determining the optimal timing for applying stress mitigation methods in areas with shallow and saline groundwater.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"210 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142123109","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":"Drought Priming Promotes Nitrogen Use Efficiency in Wheat (Triticum aestivum L.) Under Drought Stress During Grain Filling","authors":"Jiawei He,&nbsp;Yujie He,&nbsp;Jian Cai,&nbsp;Qin Zhou,&nbsp;Yingxin Zhong,&nbsp;Dong Jiang,&nbsp;Xiao Wang","doi":"10.1111/jac.12753","DOIUrl":"https://doi.org/10.1111/jac.12753","url":null,"abstract":"<div>\u0000 \u0000 <p>Drought stress significantly challenges wheat production globally, and drought priming has emerged as an effective strategy to mitigate yield loss under drought stress events. However, the effect of drought priming on plant nitrogen use efficiency (NUE) remains insufficiently understood. This study investigates the effects of drought priming at the six-leaf stage on NUE under drought stress during grain filling in four wheat varieties with distinct responses to drought priming. Our results indicate that there is no correlation between inherent drought tolerance and the effects of drought priming among the wheat varieties studied. In priming-sensitive varieties, drought-primed plants exhibited significant improvements in grain yield and NUE under drought stress compared to non-primed plants. Conversely, priming-insensitive varieties showed no significant differences in yield or NUE between primed and non-primed plants under similar conditions. Notably, under drought stress, primed plants exhibited higher yield and NUE than non-primed plants in drought priming positive variety, while the opposite trend was observed in drought priming negative response variety. The enhancement of NUE through drought priming was associated with improved nitrogen uptake efficiency and its allocation to spikes, with abscisic acid accumulation playing a pivotal role. These findings provide valuable insights into the mechanisms by which drought priming enhances NUE under drought stress, contributing to the development of sustainable agricultural practices amid climate change.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"210 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142123110","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":"Nitrogen Supply Mitigates Heat Stress on Photosynthesis of Maize (Zea mays L.) During Early Grain Filling by Improving Nitrogen Assimilation","authors":"Dong Guo,&nbsp;Rui Wang,&nbsp;Chuanyong Chen,&nbsp;Baozhong Yin,&nbsp;Zaisong Ding,&nbsp;Xinbing Wang,&nbsp;Ming Zhao,&nbsp;Baoyuan Zhou","doi":"10.1111/jac.12750","DOIUrl":"https://doi.org/10.1111/jac.12750","url":null,"abstract":"<div>\u0000 \u0000 <p>High temperature during early grain-filling stage is one of the serious abiotic stresses limiting maize yield in the North China Plain. Nitrogen (N) fertiliser has an important role in promoting crop growth, especially under abiotic stresses. However, its contribution to alleviating heat stress (HS) inhibition on maize photosynthesis during early grain-filling stage is still unclear. Experiments with three N rates (LN, low nitrogen; MN, medium nitrogen; HN, high nitrogen) and two temperature (HS, heat stress; CK, ambient temperature as control) regimes were conducted to examine the effects of increasing N supply on photosynthesis, N assimilation, antioxidant system, and hormones homeostasis of maize during early grain-filling stage using two maize hybrids Xianyu335 (XY335, heat-sensitive) and Zhengdan (ZD958, heat-tolerant). HS negatively affected photosynthesis of both two hybrids, exhibited lower net photosynthetic rate, chlorophyll content and activities of Rubisco and phosphoenolpyruvate carboxylase (PEPC) compared with CK, and then decreased dry matter accumulation of maize, with a lesser extent for ZD958 than XY335. However, increasing N supply alleviated the adverse effects of HS on maize photosynthesis due to improved N assimilation capacity. Under HS condition, greater N content and higher activities of glutamine synthetase and glutamate synthase in maize ear leaf were found in treatment of HN compared with LN and MN. HN with higher N assimilation capacity directly increased the net photosynthetic rate due to improved chlorophyll content, activities of Rubisco and PEPC and antioxidant capacity. HS-induced abscisic acid (ABA) accumulation was also repressed by HN, and then enhanced the stomatal conductance and transpiration rate to maintain higher photosynthetic capacity compared with LN and MN. Moreover, the positive effects of increasing N supply on maize photosynthesis under HS condition exhibited a larger extent for XY335 than ZD958. As a result of improved photosynthesis and N assimilation capacity by adequate N supply, maize accumulated more biomass under HS, especially for heat-sensitive hybrid.</p>\u0000 </div>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"210 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142013604","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":"Responses of Leaf Expansion, Plant Transpiration and Leaf Senescence of Different Soybean (Glycine max. (L.) Merr.) Genotypes to Soil Water Deficit","authors":"Lin Kang,&nbsp;Philippe Debaeke,&nbsp;Céline Schoving,&nbsp;Pierre Maury","doi":"10.1111/jac.12746","DOIUrl":"https://doi.org/10.1111/jac.12746","url":null,"abstract":"<p>The responses of eco-physiological processes such as leaf expansion, plant transpiration and senescence to soil water deficit have been reported to be genotype-dependent in different crops. To study such responses in soybean (<i>Glycine max</i>. (L.) Merr.), a 2-year (2017 and 2021) outdoor pot experiment was carried out on the Heliaphen automated phenotyping platform at INRAE in Toulouse (France). Six soybean cultivars (Sultana-MG 000, ES Pallador-MG I, Isidor-MG I, Santana-MG I/II, Blancas-MG II and Ecudor-MG II) belonging to four maturity groups (MG) commonly grown in Europe were subjected to progressive soil water deficit from the reproductive stage R1 for 17 and 23 days in 2017 and 2021, respectively. The fraction of transpirable soil water (FTSW) was used as an indicator of soil water deficit. Non-linear regression was used to calculate FTSWt, that is, the FTSW threshold for which the rate of the eco-physiological process in stressed plants starts to diverge from a reference value. According to FTSWt, the three eco-physiological processes showed significant differences in sensitivity to water deficit: leaf expansion exhibits the highest sensitivity and the widest range (FTSWt: 0.44–0.93), followed by plant transpiration (FTSWt: 0.17–0.56), with leaf senescence showing the narrowest range (FTSWt: 0.05–0.16). Among six cultivars, regarding leaf expansion, Cvs Santana (FTSWt = 0.48 in 2017; FTSWt = 0.44 in 2021), Blancas (FTSWt = 0.51 in 2017; FTSWt = 0.48 in 2021) and Ecudor (FTSWt = 0.46 in 2017; FTSWt = 0.52 in 2021) in late MGs (I/II to II) exhibited higher tolerance to soil drying. Conversely, the cv. Sultana in the earliest MG (000) showed the highest sensitivity (FTSWt = 0.91 in 2017; FTSWt = 0.93 in 2021) to water deficit. However, concerning the FTSWt values for plant transpiration (0.17–0.56 in 2017; 0.19–0.31 in 2021) and senescence (0.05–0.16 in 2017; 0.06–0.16 in 2021), their range did not demonstrate a correlated trend with the MG. In addition, a negative linear correlation was observed between values of FTSWt of normalised leaf expansion at the whole-plant level (NLE) and specific leaf area (SLA) measured on irrigated plants for both years. This suggests that genotypes with high values of SLA could be associated with higher tolerance of leaf expansion to soil water deficit. Such a non-destructive phenotyping method under outdoor conditions could bring new information to variety testing process and provide paths for integrating genotypic variability into crop growth models used for simulating soybean eco-physiological responses to water deficit across the plant, field and even regional scales.</p>","PeriodicalId":14864,"journal":{"name":"Journal of Agronomy and Crop Science","volume":"210 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jac.12746","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142013603","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}