Evaluation of drought-tolerant varieties based on root system architecture in cotton (Gossypium hirsutum L.) DOI Creative Commons
Congcong Guo, Lingxiao Zhu, Hongchun Sun

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 8, 2024

Abstract Background:Root system architecture (RSA) exhibits significant genetic variability and is closely associated with drought tolerance. However, the evaluation of drought-tolerant cotton varieties based on RSA in field conditions still unclear.Results:So, we conducted a comprehensive analysis tolerance physiological morphological traits (i.e., aboveground RSA, yield) within rain-out shelter, two water treatments: well-watered (75 ± 5% soil relative content) stress (50 content). The results showed that principal component identified six components, including highlighting importance root canopy parameters influencing Moreover, systematic cluster were used to classify 80 into 5 categories, varieties, weak intermediate drought-sensitive varieties. Further validation index yield biomass 8.97 5.05 times higher than those respectively.Conclusions:The was characterised by increase average length-all lateral roots, decrease emergence angle moderate root/shoot ratio. In contrast, roots both It therefore more accurate assess crop considering performance.

Language: Английский

Exogenous Melatonin Improves Drought Tolerance by Regulating the Antioxidant Defense System and Photosynthetic Efficiency in Fodder Soybean Seedings DOI Creative Commons

Qianhan Zhao,

Xueling Zheng, Chen Wang

et al.

Plants, Journal Year: 2025, Volume and Issue: 14(3), P. 460 - 460

Published: Feb. 5, 2025

Fodder soybean (Glycine max L.) with high protein and yield is a popular forage grass in northeast China. Seasonal drought inhibits its growth development during seedling stage. The objective of this study was to observe morpho-physiological changes fodder seedlings under melatonin (MT) treatments identify appropriate concentration alleviate the damage. Two varieties commonly used China were treated 0, 50, 100, 150 μM at soil water content 30%. results indicated that applying enhanced height, biomass altered root morphology water-deficient conditions. different concentrations significantly reduced contents H2O2, O2− MDA, while boosting capacity antioxidant defense system osmotic adjustment substances. Meanwhile, increases light energy capture transmission efficiency observed. Furthermore, treatment regulated expression levels genes associated photosynthesis system. Notably, 100 produced most favorable effect all These research provide new information for enhancing tolerance using chemical measures.

Language: Английский

Citations

0
Composite microbial agent improves cotton yield and resource use efficiency under mild salt stress by optimizing plant resource allocation DOI Creative Commons

Xiao Guang Zhao,

Panpan Guo, Wu Xiong

et al.

Agricultural Water Management, Journal Year: 2025, Volume and Issue: 310, P. 109358 - 109358

Published: Feb. 11, 2025

Language: Английский

Citations

0
Melatonin and mepiquat chloride impact on cotton growth, physiological and yield at different growth stages DOI Creative Commons
Irshad Ahmad,

Guanglong Zhu,

Guisheng Zhou

et al.

Industrial Crops and Products, Journal Year: 2025, Volume and Issue: 226, P. 120702 - 120702

Published: Feb. 17, 2025

Language: Английский

Citations

0
Influence of Exogenous Melatonin on the Physiological Traits of Camellia hainanica Seedlings Under Polyethylene Glycol-Induced Drought Stress DOI Creative Commons
Liang Ge, Muhammad Zeeshan Ul Haq,

Yanqiang Yao

et al.

Plants, Journal Year: 2025, Volume and Issue: 14(5), P. 676 - 676

Published: Feb. 22, 2025

This study investigated the effects of exogenous melatonin (MT) on physiological responses Camellia hainanica seedlings under drought stress, using drought-tolerant variety “Hai Da 1” and drought-sensitive “Wan Hai as test materials. Seedlings were treated with MT at concentrations 0, 50, 100, 150, 200, 250 μmol/L through irrigation, followed by stress induced polyethylene glycol (PEG-6000). The results revealed that alleviated growth damage caused PEG-simulated leaf relative conductivity malondialdehyde (MDA) content showing an initial decrease increase concentration rose. In contrast, water content, chlorophyll antioxidant enzyme activity, secondary metabolite levels, carbohydrate initially increased then declined increasing concentration. Treatment 200 notably reduced MDA 40–50%, enhanced activity 20–30%, levels 11–42% in variety. These findings identified optimal for mitigating C. seedlings, providing a foundation its practical application production further research into resistance mechanisms mediated MT.

Language: Английский

Citations

0
Enhancing saline-alkali tolerance in cucumber seedlings: The role of exogenous melatonin in redox homeostasis and stomatal function DOI Creative Commons

Shuchao Huang,

Peng Wu,

Xiting Yang

et al.

Plant Stress, Journal Year: 2025, Volume and Issue: unknown, P. 100789 - 100789

Published: March 1, 2025

Language: Английский

Citations

0
Exogenous melatonin mitigates drought stress by promoting the living cortical area of roots in cotton DOI Open Access
Haitao Zhang, Congcong Guo,

Hongchun Sun

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

Abstract The root cortex plays a critical role in water absorption, influencing function and metabolic activity. However, the effects of melatonin on cortical cells its drought resistance remain unclear. This study examines impact exogenous cotton under stress, focusing relationship with uptake resilience. Cotton plants were treated 8% PEG6000 for stress 100 µM by foliar application. results demonstrated that application significantly increased living area roots notable increases 26.34% 59.00% at distances 1 cm 13 from tip, respectively. Melatonin also enhanced thickness, promoted osmotic regulation, respiratory enzyme activity, improved nutrient uptake. Furthermore, both shoot growth. Notably, positively correlated substance accumulation, respiration, absorption capacity conditions. In conclusion, alleviates drought-induced damage enhancing area, optimizing improving thus promoting growth resistance. These findings highlight as promising regulator Highlight Exogenous integrity improves nutrients, promotes cotton, enhances

Language: Английский

Citations

0
Premature senescence in Bt Cotton: understanding the mechanisms and control measures DOI Creative Commons
Yizhen Chen, Hezhong Dong

Journal of Cotton Research, Journal Year: 2025, Volume and Issue: 8(1)

Published: April 10, 2025

Abstract Premature senescence in Bacillus thuringiensis (Bt) cotton has emerged as a significant challenge to the formation and realization of fiber yield quality since its commercialization 1997. Initially, premature was thought be an inherent trait associated with Bt gene. However, subsequent research practice have demonstrated that it is not directly linked gene but rather results from physiological imbalance between sink source, well root shoot cotton. This short review provides overview causes, mechanisms, control measures for It offers valuable insights future sustainable application transgenic crops.

Language: Английский

Citations

0
Exogenous melatonin alleviates drought stress in wheat by enhancing photosynthesis and carbon metabolism to promote floret development and grain yield DOI Creative Commons
Yanyan Zhang, Yahui Li, Jiahao Liu

et al.

Plant Stress, Journal Year: 2025, Volume and Issue: unknown, P. 100885 - 100885

Published: May 1, 2025

Language: Английский

Citations

0
Rhizosphere bacterial community confers drought tolerance to Astragalus mongholicus DOI Creative Commons
Shuyan Li, Pei‐Rong Li, Hao Ding

et al.

Agricultural Water Management, Journal Year: 2025, Volume and Issue: 315, P. 109543 - 109543

Published: May 10, 2025

Language: Английский

Citations

0
Exogenous melatonin delays leaves senescence and enhances saline and alkaline stress tolerance in grape seedlings DOI Creative Commons
Zhongyi Yang,

Xixi Yang,

Shimei Wei

et al.

Plant Signaling & Behavior, Journal Year: 2024, Volume and Issue: 19(1)

Published: April 22, 2024

Saline and alkaline stress is one of the major abiotic stresses facing agricultural production, which severely inhibits growth yield plant. The application plant regulators can effectively prevent crop reduction caused by saline stress. Exogenous melatonin (MT) act as a signaling molecule involved in regulation variety physiological processes plants, has been found to play key role enhancing improvement tolerance stresses. However, effects exogenous MT on table grape seedlings its mechanism have not clarified. aim this study was investigate morphological (Vitis vinifera L.) under results showed that resulted yellowing wilting leaves decrease chlorophyll content, whereas alleviated degradation seedling promoted accumulation soluble sugars proline content. In addition, increased activity antioxidant enzymes, scavenging reactive oxygen species (ROS) generated conclusion, stress, enhanced resistance promote development industry areas.

Language: Английский

Citations

2