摘要
以黄华占种子为材料,研究盐胁迫条件下,外源亚精胺(Spd)对水稻幼苗根系的生长、抗氧化酶活性、活性氧(ROS)代谢、丙二醛(MDA)以及Na^(+)稳态的影响。结果表明,经100 mmol/L NaCl溶液处理水稻幼苗根系的ROS、·O_(2)^(-)、H_(2)O_(2)、Na^(+)和MDA含量显著升高,过氧化物酶(POD)和过氧化氢酶(CAT)活性显著降低;在盐胁迫条件下,施用0.1 mmol/L Spd显著提高水稻幼苗根系的CAT和POD活性,显著降低ROS、·O_(2)^(-)、H_(2)O_(2)、Na^(+)和MDA含量,从而减轻Na^(+)毒害和过氧化造成的膜损伤,保护生物膜系统的稳定,维持细胞的稳态。
The effects of exogenous spermidine (Spd) on rice seedling growth,antioxidant enzyme activity,reactive oxygen species(ROS)metabolism,malonic dialdehyde (MDA)and Na^(+)homeostasis were studied with rice variety Huanghuazhan as the material.The results showed that the content of ROS、·O_(2)^(-)、H_(2)O_(2)、Na^(+)and MDA were significantly increased in the root of rice seedlings by treated with 100 mmol·L-1NaCl,meanwhile,the activities of catalase(CAT)and peroxidase(POD)were remarkably reduced.However,the activities of CAT and POD were significantly enhanced by using 0.1 mmol·L-1Spd,and the content of ROS、·O_(2)^(-)、H_(2)O_(2)、Na^(+)and MDA were remarkably decreased.So,the damage of Na^(+)toxicity and membrane oxidation were alleviated,the stability of biofilm system was protected,and the steady state of cells was maintained with Spd under salt stress condition.
作者
黄婷婷
郑殿峰
冯乃杰
赵黎明
周鸿凯
沈雪峰
HUANG Tingting;ZHENG Dianfeng;FENG Naijie;ZHAO Liming;ZHOU Hongkai;SHEN Xuefeng(College of Coastal Agricultural Science,Guangdong Ocean University,Zhanjiang,Guangdong 524088,China;South China Branch of National Saline Alkali Tolerant Rice Technology Innovation Center,Zhanjiang,Guangdong 524088,China)
出处
《中国稻米》
北大核心
2023年第2期43-47,共5页
China Rice
基金
广东海洋大学国家级创新创业训练计划项目(CXXL2020013)
广东海洋大学科研启动费资助项目(R20062)
广东省重点领域研发计划项目(2020B020219004)。
