Responses of antioxidant gene, protein and enzymes to salinity stress in two genotypes of perennial ryegrass (Lolium perenne) differing in salt tolerance

Journal of Plant Physiology
Longxing HuJinmin Fu

Abstract

Salinity could damage cellular membranes through overproduction of reactive oxygen species (ROS), while antioxidant capacities play a vital role in protecting plants from salinity caused oxidative damages. The objective of this study was to investigate the toxic effect of salt on the antioxidant enzyme activities, isoforms and gene expressions in perennial ryegrass (Lolium perenne L.). Salt-tolerant 'Quickstart II' and salt-sensitive 'DP1' were subjected to 0 and 250 mM NaCl for 12 d. Salt stress increased the content of lipid peroxidation (MDA), electrolyte leakage (EL) and hydrogen peroxide (H₂O₂), to a greater extent in salt-sensitive genotype. Salt-stressed plant leaves exhibited a greater activity of superoxide dismutase (SOD, EC 1.15.1.1), peroxidase (POD, EC 1.11.1.7), ascorbate peroxidase (APX, EC 1.11.1.11) at 4d after treatment (DAT), but a lower level of enzyme activity at 8 and 12d, when compared to the control. Catalase (CAT, EC 1.11.1.6) activity was greater at 4 DAT and thereafter decreased in salt tolerant genotype relative to the control, whereas lower than the control during whole experiment period for salt-sensitive genotype. There were different patterns of five isoforms of SOD, POD and two isoforms of APX b...Continue Reading

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Citations

Jul 9, 2013·Photosynthesis Research·Ke ChenJinmin Fu
Apr 23, 2013·Plant Physiology and Biochemistry : PPB·Haitao ShiZhulong Chan
Dec 4, 2015·Environmental Science and Pollution Research International·Ying ZhangShuwei Duan
Nov 19, 2015·Frontiers in Plant Science·Jibiao FanJinmin Fu
Nov 29, 2012·Journal of Experimental Botany·Yuri Shavrukov
Jun 2, 2015·Frontiers in Plant Science·Shamila W AbeynayakeBirte Boelt
Dec 23, 2015·Journal of the Science of Food and Agriculture·Jianhui BaiRuizong Jia
Jan 31, 2017·Molecular Plant-microbe Interactions : MPMI·Yan XieJinmin Fu
Mar 19, 2015·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Xia WangXinquan Zhang
Nov 8, 2013·Environmental Science. Processes & Impacts·Ying Sui, Hong Yang
Nov 22, 2017·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Tatiana RossattoLuciano da Silva Pinto
Aug 29, 2018·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Nasser GhaderiAdel Siosehmardeh

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