Changes in cotton water use efficiency and its mechanism during drought and subsequent rehydration

He, Jiaqi; Hu, Wei; Zhu, Honghai; Li, Yuxia; Zou, Jie; Khattak, Wajid Ali; Zhou, Zhiguo

doi:10.1016/j.envexpbot.2023.105285

Cited by 3 publications

(3 citation statements)

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“…Although, prolonged drought can result in permanent wilting and damage crop growth and productivity. Many other studies reported the same negative effects of water deficits on the net photosynthesis of cotton leaves compared to normal or mild water stress (He et al, 2023). The LICOR-measured data were found to be substantially congruent with previously obtained data in canola, fenugreek, quinoa, and Moldavian balm (Kabiri et al, 2018).…”

Section: Effect Of Foliar Melatonin On Drought-induced Alterations In...supporting

confidence: 86%

“…Measured data were subjected to analysis of variance (ANOVA) using Statistix 8.1 statistical package, and differences between means ( n = 3) were determined by the least significant difference (LSD) test at p ≤ 0.05. Figures were plotted using Sigma plot 14.0, and R 3.6.1 was used to plot the correlation matrix (correlogram) and PCA‐Biplot (He et al, 2023; Khattak et al, 2022). The percentage change plots are the mean comparisons of different FC and melatonin values with their control levels and the total change of a specific study activity with the number of DAF compared to the first day of the experiment, that is, three DAF.…”

Section: Methodsmentioning

confidence: 99%

“…Global warming poses a serious threat to agricultural productivity by affecting crops physically or physiologically through diverse fluctuations in environmental conditions (Yadav et al, 2020). Among these, increased water scarcity is one of the most devastating climate events threatening cotton production (He et al, 2023). Drought slows plant growth and causes a wide range of anatomical and morphophysiological interruptions in plants (Cui et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Foliar melatonin ameliorates drought‐induced alterations in enzyme activities of sugar and nitrogen metabolisms in cotton leaves

Khattak,

He,

Sun

et al. 2023

Physiologia Plantarum

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Sugar and nitrogen metabolisms help plants maintain cellular homeostasis, stress tolerance, and sustainable growth in drought conditions. Melatonin, a potent antioxidant and signaling molecule, appears to mitigate the negative impacts of drought on plants. This study aimed to investigate the potential role of foliar‐applied melatonin in ameliorating drought‐induced alterations in leaf sugar and nitrogen metabolisms' enzyme activities during cotton flowering and boll formation. To date, no study has examined drought‐induced sugar and nitrogen metabolisms' enzyme activity changes in cotton treated with foliar melatonin. Drought levels (FC1 = 75 ± 5%, FC2 = 60 ± 5%, and FC3 = 45 ± 5%) were maintained between 3 and 35 days after flowering (DAF), and melatonin (M) concentrations (0, 25, 50, and 100 μmol L−1) were applied at 3 and 21 DAF in a completely randomized design. M100 concentrations at low FC levels significantly enhanced leaf sugar and N‐metabolic enzyme activities, such as sucrose synthase (65.56%) and glutamine synthetase (55.24%), compared to plants not treated with melatonin; peaking between 7 and 21 DAF and declining gradually with crop growth. Moreover, the M100 concentrations at all FC levels, particularly FC3, significantly increased the relative expression of GhSusB, GhSusC, SPS1, and SPS3 genes, indicating that melatonin improves leaf sugar and N‐metabolism enzymatic activities under drought stress. Therefore, applying M100 concentrations to cotton foliage under FC3 conditions during reproductive stages improves leaf water status, sugar, and N‐metabolism enzyme activities, demonstrating melatonin's potent anti‐stress, osmoregulatory, and growth‐promoting properties in overcoming drought stress in cotton crops. Future research into the molecular mechanisms of melatonin‐mediated sugar and nitrogen metabolism enzyme activities in cotton leaves may lead to biotechnological methods to improve drought resilience in cotton and other crops.

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Section: Effect Of Foliar Melatonin On Drought-induced Alterations In...supporting

confidence: 86%

Section: Methodsmentioning

confidence: 99%