NO is involved in spermidine-induced drought tolerance in white clover via activation of antioxidant enzymes and genes

Protoplasma
Dandan PengYan-Hong Yan

Abstract

Nitric oxide (NO), a key signaling molecule, can be induced by polyamines (PAs), which play an important role in improving drought tolerance in plants. This study was to further investigate the role of NO in spermidine (Spd)-induced drought tolerance associated with antioxidant defense in leaves of white clover (Trifolium repens) under drought stress induced by -0.3 MPa polyethylene glycol (PEG-6000) solution. A hydroponic growth method was used for cultivating plants in a controlled growth chamber for 30-33 days until the second leaves were fully expanded. Two relative independent experiments were carried out in our study. One is that exogenous application of Spd or an NO donor (sodium nitroprusside (SNP)) significantly improved drought tolerance in whole plants, as demonstrated by better phenotypic appearance, increased relative water content (RWC), and decreased electrolyte leakage (EL) and malondialdehyde (MDA) content in leaves as compared to untreated plants. For another detached leaf experiment, PEG induced an increase in the generation of NO in cells and significantly improved activities of nitrate reductase (NR) and nitric oxide synthase (NOS). These responses could be blocked by pre-treatment with a Spd biosynthetic i...Continue Reading

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Citations

Jan 27, 2018·Science·Frank MadeoGuido Kroemer
Feb 10, 2017·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Jun IsoePatricia Y Scaraffia
Oct 1, 2019·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Rehmana GhafoorZhang Lixin
Dec 1, 2018·BMC Plant Biology·Jiaowen PanWei Liu
Nov 22, 2019·Frontiers in Plant Science·Ana Bernardina MenéndezOscar Adolfo Ruiz
Oct 7, 2019·Physiologia Plantarum·Sheelavanta M ShivarajRupesh Deshmukh
Mar 7, 2021·Plants·Su-Ee LauBoon Chin Tan
May 23, 2021·Phytochemistry·Loris Grossi, Raffaella Casadei

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