Interactive effects of nitrogen and irradiance on sustained xanthophyll cycle engagement in Eucalyptus nitens leaves during winter

被引：20

作者：

Close, DC

Beadle, CL

Hovenden, MJ

机构：

[1] Cooperat Res Ctr Sustainable Prod Forestry, Hobart, Tas 7001, Australia

[2] Univ Tasmania, Sch Plant Sci, Hobart, Tas 7001, Australia

[3] Univ Tasmania, Sch Agr Sci, Hobart, Tas 7001, Australia

[4] CSIRO, Forestry & Forest Prod, Hobart, Tas 7001, Australia

来源：

OECOLOGIA | 2003年 / 134卷 / 01期

关键词：

cold-induced photoinhibition; shade; nutrient stress;

D O I：

10.1007/s00442-002-1097-z

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Eucalyptus nitens is a species that is adapted to low temperature. This study examines xanthophyll-cycle engagement in E. nitens seedlings exposed to cold-induced photoinhibitory conditions under different levels of irradiance and nutrient status. Xanthophyll-cycle pool size indicated an increased requirement for light energy dissipation under high irradiance and low nutrient status. Greater sensitivity to photoinhibition of non-shaded seedlings indicated that sustained xanthophyll-cycle engagement may occur in response to damaged chlorophyll. Within irradiance treatments, fertilised seedlings had higher photochemical efficiency and faster recovery from photoinhibition than unfertilised seedlings. These results demonstrate that fertilised compared to unfertilised seedlings can utilise a greater proportion of incident light under cold temperature conditions.

引用

页码：32 / 36

页数：5

共 25 条

[1] The xanthophyll cycle and sustained thermal energy dissipation activity in Vinca minor and Euonymus kiautschovicus in winter [J].