Nitric oxide-mediated drought stress tolerance via improvement crop yield, antioxidants, membrane integrity and reducing the oxidative stress of two faba bean cultivars

Journal Title: Journal of Multidisciplinary Sciences - Year 2019, Vol 1, Issue 2

Abstract

Nitric oxide (NO) is a prevalent signaling molecule that regulates plant responses to potential plant stresses like drought. Growth and seeds yield/plant improvement under drought stress was the net result of the regulatory role of NO-priming on different physiological pathways of two faba bean plants differing in their drought tolerance. NO efficiently enhanced the machinery of photosynthesis via increasing chlorophyll a, b and carotenoids which associated with lowering of hydrogen peroxide, superoxide anion and hydroxyl radical. Thus, the tested dose of NO had an efficient free radical quenching system as witnessed from activating phenolics, ASA, SOD, APX, and CAT. All these up-regulations reflected on maintaining higher membrane stability via lowered lipid peroxidation and electrolyte leakage under both control and drought treated plants. The promoter role of NO on metabolic and antioxidative activities could serve as an important component of the defense mechanism against oxidative burst induced by drought stress.

Authors and Affiliations

Nahla Dief, Eman Salah Esmail Aldaby, Mona Fathi AbdElmowla Dawood, Mohammed Ali Ahmed Zidan

Keywords

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