作物学报2012，Vol.38Issue(2)：352-359,8.DOI:10.3724/SP.J.1006.2012.00352
低温胁迫下聚糠萘合剂对玉米幼苗光合作用和抗氧化酶活性的影响
Effects of PASP-KT-NAA on Photosynthesis and Antioxidant Enzyme Activities of Maize Seedlings under Low Temperature Stress
摘要
Abstract
A pot experiment of maize seedlings was conducted to investigate the effects of low temperature stress and the chemical regulator of PASP-KT-NAA (PKN) on photosynthetic, physiological parameters, chlorophyll contents, and various antioxidant enzymes activities. The results showed that, in maize seedlings under low temperature stress, the photosynthesis ability and SOD, POD, CAT activities reduced; the formation speed of hydrogen peroxide and superoxide anion, as well as MDA contents increased. PKN pretreatment increased Pn, Gs, Fv/Fm, and chlorophyll contents. Under low temperature stress for seven days, Pn, Gs, Fv/Fm, chlorophyll contents of Zhengdan 958 treatment (ZDTR) and Fengdan 3 treatment (FDTR) were higher than those of CK, which was increased by 88.95% and 61.11%, 593.33% and 1 741.67%, 111.50% and 145.16%, 36.61% and 54.03%. While the formation speed of hydrogen peroxide and superoxide anion reduced, MDA contents decreased too. Simultaneously, SOD, POD, CAT activities were increased by 292.59% and 632.98%, 295.07% and 360.54%, 254.55% and 265.45%. In conclusion, PKN pretreatment can improve the cold resistance of maize seedlings关键词
冷害胁迫/抗氧化酶/光合作用/玉米幼苗/化学调控Key words
Low temperature stress/Antioxidant enzyme/Photosynthesis/Maize seedlings/PKN regulation引用本文复制引用
徐田军,董志强,兰宏亮,裴志超,高娇,解振兴..低温胁迫下聚糠萘合剂对玉米幼苗光合作用和抗氧化酶活性的影响[J].作物学报,2012,38(2):352-359,8.基金项目
本研究由国家自然科学基金项目(30971726)和国家科技支撑计划项目(2006BAD02A13-4)资助. （30971726）
