Waterlogging tolerance is associated with root porosity in barley (Hordeum vulgare L.)

Broughton, Sue; Zhou, Gaofeng; Teakle, Natasha L.; Matsuda, Rena; Zhou, Meixue; O’Leary, Rebecca A.; Colmer, Timothy D.; Li, Chengdao

doi:10.1007/s11032-015-0243-3

Cited by 62 publications

(57 citation statements)

References 31 publications

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“…All the genotypes had a low percentage of root porosity and no significant differences were found among genotypes. Our results were slightly different from the report by Broughton et al (2015), who found not only higher percentage of root porosity but significant differences among barley genotypes when subjected to hydroponic aerated solutions. It is possible that the aerated hydroponic solution generated slight hypoxic conditions (or perhaps increased root ethylene), causing the increase of root porosity in waterlogging-tolerant genotypes.…”

Section: Discussioncontrasting

confidence: 99%

“…After 21 days of waterlogging treatment, growth parameters, including longest adventitious root length, shoot dry weight, and root dry weight were reduced to 20-80 % of the same growth parameters in aerated conditions (Broughton et al 2015;Garthwaite et al 2003;Mcdonald et al 2001;Pang et al 2004). After 7 days of waterlogging treatment, the longest adventitious root length, shoot dry weight and root dry weight of all the six genotypes also decreased by 40-95 % of the same growth parameters in aerated conditions.…”

Section: Waterlogging Influence On Plants Growthmentioning

confidence: 96%

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Waterlogging tolerance in barley is associated with faster aerenchyma formation in adventitious roots

et al. 2015

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Background and aims Plant adaptation to waterlogged conditions requires a set of morphological and physiological/biochemical changes. The formation of aerenchyma is one of the most crucial adaptive traits for waterlogging tolerance. Enzymatic scavenging may also potentially contribute to waterlogging tolerance by providing detoxification of reactive oxygen species (ROS). Methods Changes of root porosity (as an indicator of aerenchyma formation) and activities in leaves of four major antioxidant enzymes, γ-amino butyric acid (GABA) and lactic acid contents in roots were evaluated in six barley genotypes contrasting in waterlogging tolerance.Results Soil waterlogging caused significant increases in adventitious root porosity in all genotypes. Waterlogging-tolerant genotypes showed not only significantly higher adventitious root porosity than sensitive genotypes but also much faster development of aerenchyma. The greatest difference in adventitious root porosity among genotypes was observed after 7 days of Plant Soil waterlogging treatment. At the same time, antioxidant enzyme activities in leaves, GABA and lactic acid contents in roots did not correlate with waterlogging tolerance. Conclusions A faster formation of aerenchyma in adventitious roots is one of the key factors for waterlogging tolerance in barley. This protocol is recommended to be applied in future studies to identify molecular markers linked to this trait using appropriate mapping populations.

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Section: Discussioncontrasting

confidence: 99%

Section: Waterlogging Influence On Plants Growthmentioning

confidence: 96%

Waterlogging tolerance in barley is associated with faster aerenchyma formation in adventitious roots

et al. 2015

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“…Identification of a QTL for root porosity (as a surrogate for aerenchyma) in barley (Broughton et al . ) is of interest to explore also for wheat. Moreover, microarray analyses of laser micro‐dissected root tissues of maize (Rajhi et al .…”

Section: Discussionmentioning

confidence: 99%

“…Progress in research on root aeration in crops is worthwhile to highlight. Identification of a QTL for root porosity (as a surrogate for aerenchyma) in barley (Broughton et al 2015) is of interest to explore also for wheat. Moreover, microarray analyses of laser micro-dissected root tissues of maize (Rajhi et al 2011) and rice (Shiono et al 2015) have identified candidate genes for aerenchyma (maize) and ROL barrier induction (rice).…”

Section: Discussionmentioning

confidence: 99%

Mechanisms of waterlogging tolerance in wheat – a review of root and shoot physiology

Herzog

Striker

Colmer

et al. 2016

Plant Cell & Environment

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We review the detrimental effects of waterlogging on physiology, growth and yield of wheat. We highlight traits contributing to waterlogging tolerance and genetic diversity in wheat. Death of seminal roots and restriction of adventitious root length due to O2 deficiency result in low root:shoot ratio. Genotypes differ in seminal root anoxia tolerance, but mechanisms remain to be established; ethanol production rates do not explain anoxia tolerance. Root tip survival is short-term, and thereafter, seminal root re-growth upon re-aeration is limited. Genotypes differ in adventitious root numbers and in aerenchyma formation within these roots, resulting in varying waterlogging tolerances. Root extension is restricted by capacity for internal O2 movement to the apex. Sub-optimal O2 restricts root N uptake and translocation to the shoots, with N deficiency causing reduced shoot growth and grain yield. Although photosynthesis declines, sugars typically accumulate in shoots of waterlogged plants. Mn or Fe toxicity might occur in shoots of wheat on strongly acidic soils, but probably not more widely. Future breeding for waterlogging tolerance should focus on root internal aeration and better N-use efficiency; exploiting the genetic diversity in wheat for these and other traits should enable improvement of waterlogging tolerance.

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“…The enzymatic protective system is destroyed by oxidation caused by oxidative free radicals and the cell membrane is destroyed by lipid peroxidation, which leads to waveshaped epithelial cells, a few fragmented cells, destroyed pulp cavity to a different extent, and increased pore space to increase water-transporting capacity (Broughton et al, 2015). Therefore, the proportion between the pericycle and total root thickness is significantly increased and the degree of lignification deepened.…”

Section: Changes In the Contents Of Some Trace Mineral Elements And Vmentioning

confidence: 99%

Effects of exogenous Ca 2+ on photosynthetic characteristics and fruit quality of pepper under waterlogging stress

Ou¹,

Liu²,

Zhang³

et al. 2017

Chilean J. Agric. Res.

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Pepper is one of the most important vegetable crops in China. Consumers in China are increasingly demanding high quality pepper (Capsicum annuum L.) fruit. As in flood crops, natural disasters, such as flooding, might not only affect pepper yield, but also significantly impact fruit quality. Thus, it is necessary to study the change in fruit quality under waterlogging stress and seek an improved method. Pepper ῾5901᾽ was the experimental material; we investigated the effects of spraying exogenous Ca 2+ on the photosynthetic characteristics and quality of pepper plants under waterlogging stress. We found that waterlogging significantly reduced the photosynthesis rate (P N ), stomatal conductance (g s ), fruit length, individual fruit diameter, individual fruit fresh weight, and soluble protein, soluble sugar, free amino acid, P, Fe, vitamin C (Vc), and vitamin E (Ve) contents. It significantly decreased the expression levels of 1-aminocyclopropane-1-carboxylate oxidase 1 (ACO-1), catalase (CAT-2), and pyruvate kinase (PK) genes, and it significantly increased intracellular CO 2 concentration, capsaicin content, and the expression level of the alcohol dehydrogenase-1 (ADH-1) gene. The parenchymatous cells in the root system and stem were loosely arranged, the degree of lignification was deepened, leaves became thinner, and palisade tissue thickness was reduced. Exogenous Ca 2+ significantly enhanced capsaicin content, alleviated the extent of the reduction in the abovementioned physiological parameters, and maintained epithelial cell shape in the mesophyll layer. It maintained the intactness of the cell wall in the root system, cell membrane, and pulp cavity; it also reduced cell injury and stimulated the expression levels of ACO-1, ADH-1, CAT-2, and PK genes. Compared to the normal control, expression levels of these genes increased by 52.03%, 99.48%, 40.78%, and 125.67%, respectively. The present study indicates that spraying exogenous Ca 2+ can effectively alleviate injury to pepper plants caused by waterlogging stress and improve the quality of pepper fruit.

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Waterlogging tolerance is associated with root porosity in barley (Hordeum vulgare L.)

Cited by 62 publications

References 31 publications

Waterlogging tolerance in barley is associated with faster aerenchyma formation in adventitious roots

Waterlogging tolerance in barley is associated with faster aerenchyma formation in adventitious roots

Mechanisms of waterlogging tolerance in wheat – a review of root and shoot physiology

Effects of exogenous Ca 2+ on photosynthetic characteristics and fruit quality of pepper under waterlogging stress

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