应用生态学报2017，Vol.28Issue(4)：1246-1254,9.DOI:10.13287/j.1001-9332.201704.015
硝普钠对缺铁和硝酸盐胁迫下番茄幼苗生长及生理特性的影响
Effects of sodium nitroprusside on growth and physiological characteristics of tomato seedlings under iron deficiency and NO3-stress
摘要
Abstract
The solution culture method was used to study the effects of sodium nitroprusside (SNP)on plant growth,nutrient uptake and antioxidant enzyme activities of tomato seedlings under iron deficiency and NO3-stress.The results indicated that after 7 d of treatment,iron deficiency inhibited the tomato seedling growth,decreased chlorophyll (a and b) and carotenoid contents,and led to obvious chlorosis;iron deficiency also reduced the activity of SOD,POD and CAT,resulting in significant accumulation of MDA contents and higher electrolytic leakage;proline and soluble sugar contents were not significantly changed;contents of N,P,K,Ca,Mg and Fe in both leaves and roots of tomato seedlings were decreased under iron deficiency in varying degrees.The combined stress of NO3-stress and iron deficiency promoted the inhibition of plant growth,decreased chlorophyll (a and b),carotenoid contents and the activities of SOD,POD and CAT;electrolytic leakage MDA,proline and soluble sugar contents of N,P,Mg,Fe in both leaves and roots of tomato seedlings were much lower,but the contents of K and Ca were significantly increased.Compared to the treatment without SNP,adding 0.1 mmol · L-1 SNP could alleviate the growth inhibition of stressed tomato seedlings.Adding 0.1 mmol · L-1 SF (sodium ferrocyanide) also showed alleviating or promoting effect on some above indexes including the activity of SOD,POD and CAT to some degree,but the other physiological indexes were not significantly changed because iron was contained in SF.关键词
番茄幼苗/硝酸盐胁迫/缺铁/硝普钠/养分吸收/抗氧化酶Key words
tomato seedlings/NO3-stress/iron deficiency/sodium nitroprusside/nutrients uptake/antioxidant enzyme引用本文复制引用
何明明,王秀峰,谷端银,史宇亮,韩会会,史庆华,杨凤娟,魏珉..硝普钠对缺铁和硝酸盐胁迫下番茄幼苗生长及生理特性的影响[J].应用生态学报,2017,28(4):1246-1254,9.基金项目
本文由国家现代农业产业技术体系大宗蔬菜建设专项(CARS-25)资助 This work was supported by the Special Project of China Modern Agriculture Technology System(CARS-25). （CARS-25）
