生态学杂志2012，Vol.31Issue(3)：520-525,6.
马尾松幼苗生理指标对高锰胁迫的响应
Responses of physiological indices of Pinus massoniana seedlings to high manganese stress
摘要
Abstract
A greenhouse sand culture experiment was conducted to study the physiological re-sponses of masson pine (Pinus massoniana) seedlings to different concentrations (0.005, 1,5, 10 and 15 mmol · LT-1) of manganese (Mn). As compared with the control (0. 005 mmol · L-1 of Mn) , high Mn concentrations (10 and 15 mmol · L-1) decreased the seedling' s biomass androot activity and the needle' s chlorophyll a, chlorophyll b, and earotenoid contents, indicatingthat Mn had certain impacts on the needle photosynthetic framework, and also, was one of the reasons leading to the decrease of seedling biomass. Under the stress of high Mn concentrations, the needle superoxide dismutase ( SOD) and catalase ( CAT) activities and malondialdehyde ( MDA) content changed significantly, and played definite roles in mitigating Mn toxicity. The CAT and MDA were more sensitive to Mn, and the changes in the SOD and CAT activities and MDA content reflected the physiological responses of pine seedlings to high-Mn stress.关键词
马尾松/锰浓度/胁迫/生理指标Key words
masson pine/ manganese concentration/ stress/ physiological index分类
农业科技引用本文复制引用
宫杰芳,周运超,李小永,冉欣..马尾松幼苗生理指标对高锰胁迫的响应[J].生态学杂志,2012,31(3):520-525,6.基金项目
国家“十一五”科技支撑课题(2006BAD24B0301)、国家科技成果转化课题(2007GB2F200286)、贵州省重大专项课题和贵阳市科技局社会发展研究专项(2009-3-0419)资助. （2006BAD24B0301）
