生态学杂志2013，Vol.32Issue(3)：615-620,6.
外源一氧化氮对盐胁迫下菊苣生长及渗透调节物质的影响
Effects of exogenous nitric oxide on the growth and osmotic regulation substances of Cichorium intybus L.under salt stress
摘要
Abstract
A sand culture experiment was conducted in a growth chamber to study the responses of the growth and osmotic regulation substances of Cichorium intybus L. cv. Commander seedlings to the exogenous NO donor, sodium nitroprusside (SNP, 0. 2 mmol · L-1), under salt stress (140 and 280 mmol · L-1 of NaCl). As compared with the control, the leaf area, length, width, and relative water content (RWC) of seedlings under the salt stress had an obvious decrease whereas the leaf proline content increased significantly (P<0. 05), and the decrement and increment were time-dependent. The high-performance liquid chromatography (HPLC) analysis further indicated that the fructose, glucose and sucrose contents in the seedling' s roots under salt stress decreased after an initial increase, and the root 1-kestose and nystose contents decreased sharply under the stress of 140 mmol · L~ of NaCl but increased somewhat under the stress of 280 mmol · L-1 of NaCl. Pretreatment with SNP not only alleviated the inhibitory effects of salt stress on the leaf growth and RWC, but also made the leaf proline and nystose contents increased significantly (P<0.05) and the leaf fructose, glucose and sucrose contents decreased. It was suggested that exogenous NO could enhance the resistance of C. intybus seedlings against salt stress by increasing the seedling' s water retention capacity and promoting the synthesis of osmotic regulation substances proline and fructan, especially nystose.关键词
菊苣/一氧化氮/渗透调节物质/盐胁迫/硝普钠Key words
Cichorium intybus L./ nitric oxide (NO)/ osmotic regulation substance/ salt stress/ sodium nitroprusside分类
农业科技引用本文复制引用
谷文英,李兴正,祈新梅,高洪文..外源一氧化氮对盐胁迫下菊苣生长及渗透调节物质的影响[J].生态学杂志,2013,32(3):615-620,6.基金项目
现代农业产业技术体系建设专项(Z09090501040902)和江苏高校优势学科建设工程项目(SJ2011092506)资助. （Z09090501040902）
