Screening of drought resistance indices and evaluation of drought resistance in cotton (Gossypium hirsutum L.)

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

doi:10.1016/s2095-3119(19)62696-1

Cited by 73 publications

(67 citation statements)

References 28 publications

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“…A half‐open greenhouse experiment was carried out at Pailou Experimental Station (118°50′E, 32°02′N), Nanjing Agricultural University, China in 2017 with two cotton cultivars, Dexiamian 1, a drought‐tolerant cultivar and Yuzaomian 9110, a drought‐sensitive cultivar identified from our previous experiments (Zou et al ). The half‐open greenhouse had transparent glass top and walls that can be moved to control air exchange and precipitation.…”

Section: Methodsmentioning

confidence: 99%

Influence of drought stress on pistil physiology and reproductive success of twoGossypium hirsutumcultivars differing in drought tolerance

Huang

Bai

et al. 2019

Physiologia Plantarum

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The causes of reproductive failure under drought stress (DS) are poorly understood. We hypothesized that reproductive failure was related to drought-induced changes in pistil biochemistry. To address this hypothesis, a water deficit-induced experiment was conducted with two cotton cultivars (Dexiamian 1, drought tolerant; Yuzaomian 9110, drought sensitive). Results showed that DS decreased the photosynthesis of subtending leaf and downregulated sucrose transporter gene (GhSUT-1) expression in pistil for both cultivars, resulting in lower pistil carbon accumulation which was reflected in the decreased starch accumulation. Lower starch, as potential energy, and adenosine triphosphate (ATP), as direct energy, in droughted pistils suggested less energy for pollen tube entrance into ovules, reducing the fertilized ovule number and fertilization efficiency. Further, although pistil peroxidase activity increased under DS, a higher hydrogen peroxide (H 2 O 2 ) level still was measured in droughted pistils than well-watered pistils, damaging reproductive activities. Moreover, larger decreases in photosynthesis, pistil GhSUT-1 expression, carbon accumulation, starch and ATP contents caused by DS for Yuzaomian 9110 than Dexiamian 1, and different responses of superoxide dismutase and catalase activities, and ascorbic acid and H 2 O 2 contents to DS between the two cultivars might be the reasons causing a greater decrease in fertilization efficiency for Yuzaomian 9110 than Dexiamian 1 under DS. Thus, we suggest that decreased ovule fertilization under DS was related to the disorganized carbohydrate metabolism and inefficient antioxidant defense in droughted pistils, and the effects of DS on pistil carbohydrate metabolism and antioxidant defense were more significant for drought-sensitive cultivars than drought-tolerant cultivars.

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Section: Methodsmentioning

confidence: 99%

Influence of drought stress on pistil physiology and reproductive success of twoGossypium hirsutumcultivars differing in drought tolerance

Huang

Bai

et al. 2019

Physiologia Plantarum

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“…Although cotton (Gossypium hirsutum L.) is a crop of tropical origin, it is sensitive to the lack of moisture in the soil because of its indeterminate growth habit. Previous studies have reported that drought will significantly limit cotton yield by reducing lint percentage, boll number, and boll weight (Pettigrew, 2004;Zou et al, 2020) as well as deteriorate fiber qualities, including fiber length, strength, and micronaire Zhao et al, 2020). And the negative impacts of drought on yield and quality are due to the imbalance of some internal physiological processes under drought conditions (Hu et al, 2018;Hu, Huang, Loka, et al, 2020;Wang, Gao, et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Beneficial effects of abscisic acid and melatonin in overcoming drought stress in cotton (Gossypium hirsutumL.)

Zhang

et al. 2021

Physiologia Plantarum

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Pot experiments were performed to study the effects of abscisic acid (ABA) and melatonin (MT) on cotton drought tolerance and to explore their combined effects. ABA or MT spraying promoted water status and antioxidant capacity of drought-stressed leaves, which was conducive to scavenge ROS, finally increasing lint yield. However, the mitigation mechanisms of ABA and MT on drought were not identical, which were mainly manifested as: (1) ABA increased the relative water content (RWC) of drought-stressed leaves via, reducing water loss, but MT increased it via, promoting water uptake efficiency; (2) for enzymatic antioxidant system, ABA and MT might modulate different kinds of superoxide dismutase to catalyze the reduction of O 2 À under drought; and (3) for ascorbic acid (AsA)-glutathione (GSH) cycle, MT increased the glutathione reductase activity in drought-stressed leaves, but ABA did not. ABA + MT spraying led to higher leaf RWC and total antioxidant capacity than single hormone under drought, leading to a lower H 2 O 2 level. For the enzymatic antioxidant system, single hormone treatment affected Cu/ZnSOD or MnSOD expression, but ABA + MT upregulated both genes in drought-stressed leaves. Hormones combined application also had higher CAT expression than single hormone. For AsA-GSH cycle, ABA + MT had higher dehydroascorbic acid reductase activity than single hormone, resulting in higher AsA content. Moreover, hormones combined application caused higher ascorbate peroxidase activity than single hormone, suggesting that their combination synergistically improved the ability of AsA to eliminate ROS. All these confirmed that ABA plus MT had synergistic effects on improving crop drought resistance.

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“…The experiments were carried out in an open-top rain-proof shed (25 m long, 6 m wide, 3 m high) at Pailou experimental station of Nanjing Agricultural University, Nanjing (118.78°E, 32.04 °N), Jiangsu, China from 2018 to 2019. Two Gossypium hirsutum cultivars, Dexiamian 1 (drought-tolerant) and Yuzaomian 9110 (drought-sensitive) (Zou et al ., 2020), were selected as plant materials. Cottonseeds were sown in nutrimental bowls on 7 April 2018, and 12 April 2019, respectively.…”

Section: Methodsmentioning

confidence: 99%

Drought restricted sucrose transport from outer cottonseed coat to fiber and further inhibited cellulose synthesis during cotton fiber thickening

Zhu

et al. 2021

Preprint

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The formation of cotton fiber strength largely relies on continuous and steady sucrose supply to cellulose synthesis and is greatly impaired by drought. However, the effects of drought on sucrose import into fiber and its involvement in cellulose biosynthesis within fiber remain unclear. To end this, moisture deficiency experiments were conducted using two Gossypium hirsutum cultivars of Dexiamian 1 (drought-tolerant) and Yuzaomian 9110 (drought-sensitive). Fiber strength was significantly decreased under drought. The results of 13C isotope labeling indicated that drought notably reduced sucrose efflux from cottonseed coat to fiber, and this was caused by down-regulation of sucrose transporter genes (GhSWEET10 and GhSWEET15) in the outer cottonseed coat, finally leading to decreased sucrose accumulation in fiber. Further, under drought, the balance of sucrose allocation within fiber was disrupted by increasing the flow of sucrose into β-1,3-glucan synthesis and lignin synthesis but hindering that into cellulose synthesis in both cultivars. Additionally, glycolysis and starch synthesis were specifically enhanced by drought in Yuzaomian 9110, which further reduced the flow of sucrose into cellulose synthesis. Under drought, the cellulose deposition was decreased due to promoted cellulose degrading process in Dexiamian 1 and stunted cellulose synthesis in Yuzaomian 9110. Consequently, reduced cellulose content was measured in drought-stressed fibers for both cultivars. In summary, the inhibited cellulose accumulation caused by drought was mainly due to reduced sucrose translocation from the outer cottonseed coat to fiber, and less sucrose partitioned to cellulose synthesis pathway under the condition of intensified competition for sucrose by different metabolic pathways within fiber, finally degrading the fiber strength.

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Screening of drought resistance indices and evaluation of drought resistance in cotton (Gossypium hirsutum L.)

Cited by 73 publications

References 28 publications

Influence of drought stress on pistil physiology and reproductive success of twoGossypium hirsutumcultivars differing in drought tolerance

Influence of drought stress on pistil physiology and reproductive success of twoGossypium hirsutumcultivars differing in drought tolerance

Beneficial effects of abscisic acid and melatonin in overcoming drought stress in cotton (Gossypium hirsutumL.)

Drought restricted sucrose transport from outer cottonseed coat to fiber and further inhibited cellulose synthesis during cotton fiber thickening

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