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• W2802910130 abstract "Abstract Quinoa performance reduces under water‐limited conditions and can be improved through exogenous application of stress signalling molecule such as hydrogen peroxide (H 2 O 2 ). This study was conducted to elucidate the role of H 2 O 2 in quinoa at two water regimes maintained as full irrigated at 100% field capacity ( FC ~28% soil volumetric water contents; SVWC ) and at 60% FC (~17% SVWC ) as drought stress. Hydrogen peroxide concentrations, that is 80 m m for seed priming and 15 m m as foliar spray, were used from our preliminary experiments. Drought stress significantly reduced the plant growth, water status, photosynthetic activity and increased reactive oxygen species production (H 2 O 2 and O 2 •− ) resulting in higher oxidative damage in quinoa. Exogenous applied H 2 O 2 as priming agent improved emergence attributes by earlier emergence and made quinoa more tolerant to upcoming drought stress. Nevertheless, exogenously applied H 2 O 2 exhibited significantly higher stomatal conductance (34%), transpiration rate (39%), photosynthetic rate (42%), chlorophyll content index (36%), proline (19%) and total soluble sugar contents (14%) with respect to non‐treated plants under water‐deficit conditions. The H 2 O 2 application regulated the Abscisic acid ( ABA ) concentration under both conditions and reduced it by 30% in drought‐stressed plants as compared to non‐treated stressed plants. The exogenous application also enhanced the enzymatic antioxidants activities, including SOD , POD , CAT and APX by 32%, 31%, 34% and 53%, respectively, in quinoa plants under drought stress. We conclude that exogenous applied H 2 O 2 improved quinoa performance under drought stress is associated with higher accumulation of osmolytes, regulating ABA level and enhanced enzymatic antioxidant activities." @default.
• W2802910130 created "2018-05-17" @default.
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• W2802910130 date "2018-04-24" @default.
• W2802910130 modified "2023-10-16" @default.
• W2802910130 title "Hydrogen peroxide application improves quinoa performance by affecting physiological and biochemical mechanisms under water‐deficit conditions" @default.
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• W2802910130 doi "https://doi.org/10.1111/jac.12284" @default.
• W2802910130 hasPublicationYear "2018" @default.
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