摘要
以马铃薯郑薯5号(耐寒品种)幼苗为试验材料,采用0.5 mmol/L水杨酸(SA)叶面喷施处理,通过低温胁迫(4℃14 h,2℃10 h)后,测定马铃薯叶片丙二醛(MDA)、可溶性糖(SS)、可溶性蛋白(SP)、脯氨酸(Pro)和叶绿素总含量,过氧化物歧化酶酶(POD)和超氧化物歧化酶(SOD)活性,研究外源SA对马铃薯叶片渗透调节能力和抗氧化能力的影响。结果表明:低温胁迫下喷施SA后的马铃薯叶片MDA、SS、SP、Pro和叶绿素总含量显著提高,POD和SOD活性显著提高。因此叶面喷施外源SA能通过调控马铃薯的渗透调节和抗氧化能力来减轻细胞膜的损伤,抵制低温伤害,提高其耐寒性。
In order to study the effects of exogenous salicylic acid（SA） on the osmotic adjustment ability and antioxidant capacity of potato leaf under low temperature stress, we used potato Zhengshu 5 as experimental material. 0.5 mmol/L SA was used to spray on the leaf, then after low temperature stress（4℃ 14 h, 2℃ 10 h）, we determined the change of physiological indicators such as malondialdehyde, soluble sugar, soluble protein, proline and total content of chlorophyll, as well as the activity of superoxide dismutase and peroxide dismutase. The results showed that the contents of malondialdehyde, soluble sugar, soluble protein, proline and chlorophyll significantly increased, and the activity of superoxide dismutase and peroxide dismutase improved significantly.The study found that exogenous SA could alleviate cell membrane damage and increase low temperature tolerance by regulating osmotic adjustment and antioxidant capacity of potato seedlings.
作者
李华伟
林志坚
许泳清
罗文彬
纪荣昌
刘中华
张鸿
李国良
林赵淼
邱永祥
邱思鑫
汤浩
Li Huawei;Lin Zhijian;Xu Yongqing;Luo Wenbin;Ji Rongchang;Liu Zhonghua;Zhang Hong;Li Guoliang;Lin Zhaomiao;Qiu Yongxiang;Qiu Sixin;Tang Hao(Scientific Observing and Experimental Station of Tuber and Root Crops in South China, Ministry of Agrcultrue, Crop Institute Research Centre, Fujia)
出处
《分子植物育种》
CAS
CSCD
北大核心
2018年第10期3321-3326,共6页
Molecular Plant Breeding
基金
福建省农业科学院青年人才创新基金(2015CX-8)
福建省科技重大专项(2017NZ0002)共同资助
关键词
马铃薯
水杨酸
低温胁迫
生理特性
Potato
Salicylic acid
Low temperature stress
Physiological characteristics
