The ability to regulate voltage-gated K+-permeable channels in the mature root epidermis is essential for waterlogging tolerance in barley

Gill, Muhammad Bilal; Zeng, Fanrong; Shabala, Lana; Böhm, Jennifer; Zhang, Guoping; Zhou, Meixue; Shabala, Sergey

doi:10.1093/jxb/erx429

Cited by 34 publications

(26 citation statements)

References 72 publications

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“…Even though plants had lower green leaves dry weight and three times the senescent dry weight after early waterlogging, during the first weeks of recovery, these parameters were fully restored to controls. Gill et al () observed that 10‐day‐old seedlings waterlogged for 4 weeks showed a shoot dry weight of 55% of controls, consistently with 14‐day‐old seedlings waterlogged for 21 days generating a shoot dry weight of 37% of controls (Broughton et al, ). These reports differed from our results where no differences in the total shoot dry weight were found, but are hard to compare given the differences in plants age at waterlogging imposition and treatment durations.…”

Section: Discussionmentioning

confidence: 89%

Waterlogging differentially affects yield and its components in wheat, barley, rapeseed and field pea depending on the timing of occurrence

Ploschuk

Miralles

Colmer

et al. 2020

J Agronomy Crop Science

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Waterlogging on croplands is increasing in various areas of the world. This study evaluated the yield penalty by early and late waterlogging on wheat (Triticum aestivum L.), barley (Hordeum vulgare L.), rapeseed (Brassica napus L.) and field pea (Pisum sativum L.). Plants cultivated outdoors were exposed to a 14-day waterlogging during vegetative (at 65 days after sowing (DAS)) or reproductive (at 85/87 DAS) stages, followed by drained conditions until maturity. Yield (seed weight per plant) and its components (number of spikes/siliques/pods per plant, number of grains per spike/silique/pod and 1,000 grain weight) were assessed at maturity, along with morphological (number of tillers/branches) and shoot and root dry weight responses after waterlogging and during recovery. Wheat was the most tolerant species achieving 86% and 71% of controls in yield with early and late waterlogging, related to fewer grains per spike.Barley and rapeseed tolerated early waterlogging (yields 85% and 79% of controls) as compared to late waterlogging (32% and 26% of controls), mainly due to fewer spikes per plant (barley) or reductions in seeds per silique (rapeseed). Field pea was greatly affected by waterlogging at both timings, attaining a yield of only 6% of controls on average due to much fewer pods and fewer seeds per pod. So, wheat could be an option for areas facing either winter or spring transient waterlogging (i.e. early or late stages); barley and rapeseed are recommended only with if water excess occurs in early stages and field pea is intolerant to waterlogging. K E Y W O R D S flooding, grain production, tillering, winter crops S U PP O RTI N G I N FO R M ATI O N Additional supporting information may be found online in the Supporting Information section. How to cite this article: Ploschuk RA, Miralles DJ, Colmer TD, Striker GG. Waterlogging differentially affects yield and its components in wheat, barley, rapeseed and field pea depending on the timing of occurrence. J Agro Crop Sci.

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Section: Discussionmentioning

confidence: 89%

Waterlogging differentially affects yield and its components in wheat, barley, rapeseed and field pea depending on the timing of occurrence

Ploschuk

Miralles

Colmer

et al. 2020

J Agronomy Crop Science

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“…It also has been reported that waterlogging significantly increased the activity of enzymatic antioxidants in maize leaves under waterlogging stress 62,63 . SOD is considered a main antioxidant enzyme that provides the first line of defense against ROIs because it catalyzes the dismutation process of ⋅ O 2 − to H 2 O 2 64 , while CAT, POD, and APX help to remove H 2 O 2 by converting it to oxygen and water 65,66 . Interestingly, exogenous GABA application significantly improved the activities of these five antioxidative enzymes at both stages of two varieties in two years compared with CK and WL treatments (Fig.…”

Section: Discussionmentioning

confidence: 99%

γ-Aminobutyric Acid Promotes Chloroplast Ultrastructure, Antioxidant Capacity, and Growth of Waterlogged Maize Seedlings

Salah

Zhan

Cao

et al. 2019

Sci Rep

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γ-aminobutyric acid (GABA) is a small signaling molecule that accumulates rapidly in plants exposed to various stresses; however, it has not been applied in regulating waterlogging tolerance in maize seedlings. Here, the effect of exogenous application of GABA in the determined optimal concentration was performed on seedlings of two maize cultivars under waterlogging treatments initiated at 3-leaf (V3) and 5-leaf stages (V5) in repeated experiments in 2016 and 2017. Chloroplast ultrastructure, photosynthesis, antioxidant capacity, and reactive oxygen species (ROS) production in the leaves were examined and compared with the corresponding values under normal soil water treatment (CK) and waterlogging treatment (WL). Compared with WL treatment, application of GABA significantly increased aboveground and root dry matter by 19.0% and 61.0%, promoted photosynthetic rate and chlorophyll content by 19.8% and 36.0%, increased the number of grana per chloroplast by 36.0%, fortified antioxidants (SOD, POD, CAT, GR, APX, VC) activities by 14.7–42.7%, and reduced the content of MDA, H2O2, and O2− by 30.5%, 32.5%, and 21.8%, respectively (p < 0.05). Collectively, GABA application was shown to promote the growth of maize seedlings under waterlogging, by down regulating ROIs-producing enzymes, activating antioxidant defense systems, and improving chloroplast ultrastructure and photosynthetic traits.

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“…Leaf wilting due to water loss is the earliest observed symptom in the aboveground part of the plant. The reasons are complex and varied, such as a reduction of water otential gradient between the roots and the external environment and aquaporin gating (Gill et al 2018). Leaf wilting degree and NDWI index showed that leaf water loss was more serious in WL-sensitive plants.…”

Section: Discussionmentioning

confidence: 99%

Differential response of growth and photosynthesis in diverse cotton genotypes under hypoxia stress

Pan¹,

Jiang²,

Wang³

et al. 2019

Photosynt.

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The objectives of the present study were to compare the dynamic of the growth and photosynthetic characteristics of cotton varieties contrasting in waterlogging (WL) tolerance when subjected to hypoxia stress. The growth of the WL-sensitive genotypes was notably inhibited by WL, mainly as a result of a significant reduction in the net photosynthesis (PN) after two days of hypoxia treatment; in the tolerant varieties, no significant changes in PN were observed until 8 d after hypoxia onset. The intercellular CO2 concentration and maximal photochemical efficiency of PSII significantly declined, and the nonphotochemical quenching increased in the sensitive varieties. Infrared thermography showed that a low stomatal conductance resulted in an increased leaf temperature under hypoxia stress. Spectral image analysis suggested that the pigment content and water content rapidly decreased in the leaves of the sensitive varieties. It is concluded that maintaining stomatal opening through the interaction of ethylene and abscisic acid may be an important strategy to improve waterlogging tolerance in cotton.Additional key words: chlorophyll fluorescence; Gossypium hirsutum; hyperspectral image; infrared thermal image. Abbreviations: Ci -intercellular CO2 concentration; E -transpiration rate; Fv/Fm -optimal/maximal quantum yield of PSII; gs -stomatal conductance; NDWI -normalized difference water index; NPQ -nonphotochemical quenching coefficient; PN -net photosynthetic rate; PSSRa -pigment ratio index a; qp -photochemical quenching coefficient. Acknowledgement: We appreciate the contribution of C. Li and Y.W. Nong on experimental execution. We thank to The National Natural Science Fund (No. 31471496) for financial support.

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The ability to regulate voltage-gated K+-permeable channels in the mature root epidermis is essential for waterlogging tolerance in barley

Abstract: GORK channel-mediated K+ retention in roots is central to adaptation and signalling under hypoxia; this trait may be used as a physiological marker in waterlogging tolerance-oriented breeding programmes.

Cited by 34 publications

References 72 publications

Waterlogging differentially affects yield and its components in wheat, barley, rapeseed and field pea depending on the timing of occurrence

Waterlogging differentially affects yield and its components in wheat, barley, rapeseed and field pea depending on the timing of occurrence

γ-Aminobutyric Acid Promotes Chloroplast Ultrastructure, Antioxidant Capacity, and Growth of Waterlogged Maize Seedlings

Differential response of growth and photosynthesis in diverse cotton genotypes under hypoxia stress

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