AUTHOR=Liu Ming , Chu Meijie , Ding Yanfeng , Wang Shaohua , Liu Zhenghui , Tang She , Ding Chengqiang , Li Ganghua 

TITLE=Exogenous spermidine alleviates oxidative damage and reduce yield loss in rice submerged at tillering stage

JOURNAL=Frontiers in Plant Science

VOLUME=6

YEAR=2015

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2015.00919

DOI=10.3389/fpls.2015.00919

ISSN=1664-462X

ABSTRACT=<p>To figure out whether spermidine (Spd) can alleviate oxidative damage on rice (<italic>Oryza sativa</italic> L.) caused by submergence stress, Ningjing 3 was used in this study. The results showed that, spraying Spd on rice leaves at a concentration of 0.5 mM promoted the growth recovery of rice after drainage, such as green leaves, tillers, and aboveground dry mass. According to physiological analysis, Spd accelerate restored chlorophylls damage by submergence, and decreased the rate of <inline-formula><mml:math id="M1" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msubsup><mml:mrow><mml:mi mathcolor="black" mathsize="12pt" mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn mathcolor="black" mathsize="12pt" mathvariant="normal">2</mml:mn></mml:mrow><mml:mrow><mml:mo>·</mml:mo><mml:mo mathcolor="black" mathsize="12pt" mathvariant="normal">−</mml:mo></mml:mrow></mml:msubsup></mml:mrow></mml:math></inline-formula> generation and H<sub>2</sub>O<sub>2</sub> content, inhibited submergence-induced lipid peroxidation. Spd also helped to maintain antioxidant enzyme activities after drainage, such as superoxide dismutase, peroxidase, and GR, which ultimately improved the recovery ability of submerged rice. With the effect of Spd, the rice yields increased by 12.1, 17.9, 13.5, and 18.0%, of which submerged for 1, 3, 5, 7 days, respectively. It is supposed that exogenous Spd really has an alleviate effect on submergence damage and reduce yield loss of rice.</p>