广西植物Issue(1)：111-115,5.DOI:10.3969/j.issn.1000-3142.2014.01.021
不同蒿属植物对光强的适应性差异研究
Photosynthetic responses to light of the four sagebrush species
摘要
Abstract
The light curves of Artemisia vestita,A.mongolica,A.japonica and A.roxburghiana were measured, and parameters of photosynthesis were calculated by non-rectangle hyperbolae function.Our results showed that A. japonica had higher light saturation point(411.0μmol��m-2��s-1),higher maximum net photosynthetic rate(18.627μmol��m-2��s-1)and lower light compensation point(17.867μmol��m-2��s-1)than other species,revealing a higher ability to adapt highlight conditions for A.japonica.A.roxburghiana had the lowest values of dark respiration (0.353μmol��m-2��s-1 )and apparent quantum yield(0.038),indicating this species only maintained a low growth rate under low light conditions.Although the four species had similar trends in water use efficiency in response to in-creasing light densities,A.roxburghiana exhibited higher levels of WUE than those of other species,which might be reflected an adaptation to drought conditions.Furthermore,the parameters derived from light response curves exhibi-ted a higher variation among species,especially for Lcp and Rday .Overall,those results confirmed the hypothesis that the expression of plant functional traits was closely related to the long-term adaptation of plants to environment and survival strategy.关键词
蒿属植物/非直角双曲线/光响应曲线/适应Key words
sagebrush species/non-rectangle hyperbolae/light response curve/adaption分类
农业科技引用本文复制引用
姬明飞,丁东粮,杨鑫..不同蒿属植物对光强的适应性差异研究[J].广西植物,2014,(1):111-115,5.基金项目
河南省教育厅科学技术重点研究项目(13A180817) （13A180817）
南阳师范学院科研项目(AX2012015) （AX2012015）
