Drought stress tolerance mediated by zinc-induced antioxidative defense and osmotic adjustment in cotton (Gossypium Hirsutum)

Wu, Songwei; Hu, Chengxiao; Tan, Qiling; Lü, Li; Shi, Kaili; Zheng, Yong; Sun, Xiulan

doi:10.1007/s11738-015-1919-3

Cited by 87 publications

(54 citation statements)

References 41 publications

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“…Application of Zn under chemically (Wu et al ) or water‐induced drought (Hajiboland and Amirazad , Karim et al , Eslami and Dehghanzadeh ) results in increased WUE, photosynthetic rates, chlorophyll a and b contents and dry matter accumulation as well as increased activity of reactive oxygen species enzymes such as catalase, ascorbate peroxidase and superoxide. Endogenous application of Zn has alleviated the effects of drought in red cabbage ( Brassica oleracea L., Hajiboland and Amirazad ), cotton ( Gossypium hirsutum L., Wu et al ), sunflower ( Helianthus annuus L., Eslami and Dehghanzadeh ) and winter wheat (Karim et al ). Additional screening with a larger pool of cultivars is required to determine if these increases in micronutrients in response to MdS are specific to Stettler and Superb or if these traits can be correlated to drought tolerance.…”

Section: Discussionmentioning

confidence: 99%

“…The accumulation of micronutrients associated with reactive oxygen species scavenging such as Mn, Fe and Zn have been used as markers for drought tolerance (Lombardi et al , Hebbern et al , Millaleo et al , Wu et al ). While the direct mechanism is not fully understood, accumulation or application of Fe, Zn and Mn is correlated with increased activity of catalase, superoxide dismutase and peroxidase and increased scavenging of superoxide and hydrogen peroxide radicals in drought‐stressed crops (Lombardi et al , Hebbern et al , Millaleo et al , Wu et al ). Conversely, the absence of Mn has been correlated with reduced water‐use efficiency (WUE) and increased cuticular conductance due to epicuticular wax degradation (Hebbern et al ).…”

Section: Introductionmentioning

confidence: 99%

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Wheat flag leaf epicuticular wax morphology and composition in response to moderate drought stress are revealed by SEM, FTIR‐ATR and synchrotron X‐ray spectroscopy

Willick

Lahlali

Vijayan

et al. 2017

Physiologia Plantarum

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Wheat (Triticum aestivum L.) is the largest cereal crop grown in Western Canada where drought during late vegetative and seed filling stages affects plant development and yield. To identify new physiochemical markers associated with drought tolerance, epidermal characteristics of the flag leaf of two wheat cultivars with contrasting drought tolerance were investigated. The drought resistant 'Stettler' had a lower drought susceptibility index, greater harvest index and water-use efficiency than the susceptible 'Superb'. Furthermore, flag leaf width, relative water content and leaf roll were significantly greater in Stettler than in Superb at moderate drought stress (MdS). Visible differences in epicuticular wax density on the adaxial flag leaf surfaces and larger bulliform cells were identified in Stettler as opposed to Superb. Mid-infrared attenuated total internal reflectance spectra revealed that Stettler flag leaves had increased asymmetric and symmetric CH but reduced carbonyl esters on its adaxial leaf surface compared to Superb under MdS. X-ray fluorescence spectra revealed a significant increase in total flag leaf Zn concentrations in Stettler in response to MdS. Such information on the microstructural and chemical features of flag leaf may have potential as markers for drought tolerance and thereby accelerate the selection and release of more drought-resistant cultivars.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wheat flag leaf epicuticular wax morphology and composition in response to moderate drought stress are revealed by SEM, FTIR‐ATR and synchrotron X‐ray spectroscopy

Willick

Lahlali

Vijayan

et al. 2017

Physiologia Plantarum

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“…Osmotic adjustment refers to the lowering of osmotic potential due to the net accumulation of osmoregulation substances such as WSC, proline, SP, etc., in response to water deficits. Under drought, WSC (Premachandra et al, 1995; Jiang and Huang, 2001), proline (Naeem et al, 2016), and SP (Wu et al, 2015) play important roles in maintaining leaf turgor and promoting the root's ability to uptake more water. Dehydration‐responsive element‐binding proteins play key roles in regulation of protein synthesis and carbohydrates metabolism under drought (Wei et al, 2016a, 2016b).…”

Section: Discussionmentioning

confidence: 99%

Overexpression of Arabidopsis DREB1A Gene in Transgenic Poa pratensis: Impacts on Osmotic Adjustment and Hormone Metabolism under Drought

Li²,

Han

et al. 2017

Intl Turfgrass Soc Res J

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Drought stress is a major limiting factor in turfgrass management in many regions. The objective of this study was to examine responses of transgenic Kentucky bluegrass (Poa pratensis L.) overexpressing an Arabidopsis DREB1A gene to drought stress. Five transgenic Kentucky bluegrass (cv. Baron) lines overexpressing AtDREB1A and wild‐type (WT, nontransgenic plant) were subjected to water deficit for 12 d and then rewatering treatment for 3 d. Leaf relative water content (RWC), turf quality, electrolyte leakage (EL), osmoregulating compounds, abscisic acid (ABA), and indol‐3‐acetic acid (IAA) content were measured. Transgenic plants had higher RWC and turf quality and lower EL relative to WT plants during drought stress and recovery periods. In addition, the transgenic plants had greater osmotic adjustment associated with higher water‐soluble carbohydrates (WSC), proline, and soluble protein in leaf tissues. The transgenic plants had higher IAA and lower ABA content relative to WT plants. The results suggest that the improvement of drought tolerance in transgenic Kentucky bluegrass overexpressing the DREB1A gene may have resulted from increased accumulation of organic solutes (WSC, proline, and protein) and alteration in hormone metabolism.

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“…The supernatant was used for determination of the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX) using previously described methods (Wu et al, 2014; Wu S. et al, 2015). …”

Section: Methodsmentioning

confidence: 99%

Nitric Oxide Mediates Molybdenum-Induced Antioxidant Defense in Wheat under Drought Stress

Tan

et al. 2017

Front. Plant Sci.

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Molybdenum (Mo) has been reported to alleviate drought stress by enhancing antioxidant defense in plants, but the underlying mechanism remains unclear. Here, we hypothesized that Mo mediates nitric oxide (NO)-induced antioxidant defense through Mo-enzymes, particularly by nitrate reductase (NR) in wheat under drought stress. The 30-day-old wheat seedlings cultivated in -Mo (0 μM Mo) and +Mo (1 μM Mo) Hoagland solutions were detached and then pretreated with Mo-enzyme inhibitors, NO scavengers, NO donors or their combinations according to demands of complementary experiment under 10% polyethylene glycol 6000 (PEG)-stimulated drought stress (PSD). Mo supplementation increased the activities and transcripts of antioxidant enzymes, decreased H2O2 and MDA contents, and elevated NO production, implying that Mo-induced antioxidant defense may be related to NO signal. Complementary experiment showed that NO production was induced by Mo, while suppressed by Mo-enzyme inhibitors and NO scavengers, but restored by NO donors, suggesting that Mo-induced increase of NO production may be due to the regulation by Mo-enzymes. Further experiment indicated that the increased activities and transcripts of antioxidant enzymes induced by Mo were suppressed by Mo-enzyme inhibitors and NO scavengers, and NO donors could eliminate their suppressing effects. Moreover, Mo application increased NR activity and inhibitors of Mo-enzymes inhibited NR activity in wheat leaves under PSD, suggesting that NR might involve in the regulation of Mo-induced NO production. These results clearly indicate that NO mediates Mo-induced antioxidant defense at least partially through the regulation of NR.

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Drought stress tolerance mediated by zinc-induced antioxidative defense and osmotic adjustment in cotton (Gossypium Hirsutum)

Abstract: Zinc, as one of the essential microelements in crop plant, plays a crucial role in resistance to drought stress.

Cited by 87 publications

References 41 publications

Wheat flag leaf epicuticular wax morphology and composition in response to moderate drought stress are revealed by SEM, FTIR‐ATR and synchrotron X‐ray spectroscopy

Wheat flag leaf epicuticular wax morphology and composition in response to moderate drought stress are revealed by SEM, FTIR‐ATR and synchrotron X‐ray spectroscopy

Overexpression of Arabidopsis DREB1A Gene in Transgenic Poa pratensis: Impacts on Osmotic Adjustment and Hormone Metabolism under Drought

Nitric Oxide Mediates Molybdenum-Induced Antioxidant Defense in Wheat under Drought Stress

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