Physiological and Molecular Mechanisms of Flooding Tolerance in Plants

Lekshmy, S; Jha, Shailendra K.; Sairam, R. K.

doi:10.1007/978-1-4939-2540-7_8

Cited by 10 publications

(7 citation statements)

References 79 publications

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“…Most plants need to respond to hypoxic stress at various points in their lifecycles. Mostly obviously, heavy rain or flooding will result in soil water logging will limit the ability of oxygen to diffuse to the roots [28]. Plants may employ one of many physiological responses to submergence including hyponasty, elongation of floral stems, petioles or internodes or even the formation of aerial roots [29].…”

Section: Discussionmentioning

confidence: 99%

A discrete role for alternative oxidase under hypoxia to increase nitric oxide and drive energy production

Vishwakarma

Kumari

Mur

et al. 2018

Free Radical Biology and Medicine

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Alternative oxidase (AOX) is an integral part of the mitochondrial electron transport and can prevent reactive oxygen species (ROS) and nitric oxide (NO) production under non-stressed, normoxic conditions. Here we assessed the roles of AOX by imposing stress under normoxia in comparison to hypoxic conditions using AOX over expressing (AOX OE) and anti-sense (AOX AS) transgenic Arabidopsis seedlings and roots. Under normoxic conditions stress was induced with the defence elicitor flagellin (flg22). AOX OE reduced NO production whilst this was increased in AOX AS. Moreover AOX AS also exhibited an increase in superoxide and therefore peroxynitrite, tyrosine nitration suggesting that scavenging of NO by AOX can prevent toxic peroxynitrite formation under normoxia. In contrast, during hypoxia interestingly we found that AOX is a generator of NO. Thus, the NO produced during hypoxia, was enhanced in AOX OE and suppressed in AOX AS. Additionally, treatment of WT or AOX OE with the AOX inhibitor SHAM inhibited hypoxic NO production. The enhanced levels of NO correlated with expression of non-symbiotic haemoglobin, increased NR activity and ATP production. The ATP generation was suppressed in nia1,2 mutant and non symbiotic haemoglobin antisense line treated with SHAM. Taken together these results suggest that hypoxic NO generation mediated by AOX has a discrete role by feeding into the haemoglobin-NO cycle to drive energy efficiency under conditions of low oxygen tension.

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Section: Discussionmentioning

confidence: 99%

A discrete role for alternative oxidase under hypoxia to increase nitric oxide and drive energy production

Vishwakarma

Kumari

Mur

et al. 2018

Free Radical Biology and Medicine

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“…Alternatively, higher carbohydrate consumption in hypoxic roots (Lekshmy et al. ) may impede carbohydrate investment and morphological adjustments in leaves, reversing the positive effects of shade.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, reduced incident light may reduce the negative effects of waterlogging on cotton by increasing leaf expansion (Mommer et al 2005). Alternatively, higher carbohydrate consumption in hypoxic roots (Lekshmy et al 2015) may impede carbohydrate investment and morphological adjustments in leaves, reversing the positive effects of shade.…”

Section: Introductionmentioning

confidence: 99%

Low Incident Light Combined with Partial Waterlogging Impairs Photosynthesis and Imposes a Yield Penalty in Cotton

Ullah

Bange

Atwell

et al. 2016

J Agronomy Crop Science

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Through field studies, cotton responses to dual stresses -waterlogging and low light (shade) were investigated. The hypothesis was that shade would amplify yield losses in waterlogged (WL) cotton. Either early or late in the reproductive phase, the crop was WL (96 h and 120 h, in 2012-2013 and 2013-2014, respectively) and/or shaded (6 days or 9 days in 2012-2013 and 2013-2014, respectively). Waterlogging at early reproductive phase significantly reduced lint yield (17 % averaged across both years) of cotton, although shade-induced yield losses (18 %) were only significant in 2013-2014. Shade significantly exacerbated yield losses only when the impact of waterlogging damage was modest (2013-2014). More intense waterlogging impaired lint yield independently of the light levels. Yield reductions in these experiments were the consequence of both accelerated fruit abscission and fewer fruiting nodes produced. Plants had lower leaf nitrogen levels and photosynthetic rates after waterlogging and/or shade treatments and produced fewer fruiting nodes. Although long-term shade increased specific leaf area (30 %) and leaf N (20 %) immediately following 5 days of waterlogging, it did not restore shoot growth, node formation or lint yield because of suppressed photosynthetic performance (area basis) and carbohydrate supply.

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“…It has been reported that there is a high susceptibility of cultivated plants to waterlogging stress, affecting their growth, development, yield, and finally their survival [9,10]. One of the main effects of waterlogging is on plant growth.…”

Section: Introductionmentioning

confidence: 99%

Foliar Glycine Betaine or Hydrogen Peroxide Sprays Ameliorate Waterlogging Stress in Cape Gooseberry

Castro-Duque

Chávez-Arias

Restrepo-Díaz

2020

Plants

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Exogenous glycine betaine (GB) or hydrogen peroxide (H2O2) application has not been explored to mitigate waterlogging stress in Andean fruit trees. The objective of this study was to evaluate foliar GB or H2O2 application on the physiological behavior of Cape gooseberry plants under waterlogging. Two separate experiments were carried out. In the first trial, the treatment groups were: (1) plants without waterlogging and with no foliar applications, (2) plants with waterlogging and without foliar applications, and (3) waterlogged plants with 25, 50, or 100 mM of H2O2 or GB, respectively. The treatments in the second trial were: (1) plants without waterlogging and with no foliar applications, (2) plants with waterlogging and without foliar applications, and (3) waterlogged plants with 100 mM of H2O2 or GB, respectively. In the first experiment, plants with waterlogging and with exogenous GB or H2O2 applications at a dose of 100 mM showed higher leaf water potential (−0.5 Mpa), dry weight (1.0 g), and stomatal conductance (95 mmol·m−2·s−1) values. In the second experiment, exogenously supplied GB or H2O2 also increased the relative growth rate, and leaf photosynthesis mitigating waterlogging stress. These results show that short-term GB or H2O2 supply can be a tool in managing waterlogging in Cape gooseberry.

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Physiological and Molecular Mechanisms of Flooding Tolerance in Plants

Cited by 10 publications

References 79 publications

A discrete role for alternative oxidase under hypoxia to increase nitric oxide and drive energy production

A discrete role for alternative oxidase under hypoxia to increase nitric oxide and drive energy production

Low Incident Light Combined with Partial Waterlogging Impairs Photosynthesis and Imposes a Yield Penalty in Cotton

Foliar Glycine Betaine or Hydrogen Peroxide Sprays Ameliorate Waterlogging Stress in Cape Gooseberry

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