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 LI Youzhi,ZHANG Canming,XIE Yonghong,et al.Growth Responses of Deyeuxia angustifolia and Phragmites communis Seedlings to Low-light Stress in the Sanjiang Plain*[J].Chinese Journal of Applied & Environmental Biology,2009,15(01):53-58.[doi:10.3724/SP.J.1145.2009.00053]





Growth Responses of Deyeuxia angustifolia and Phragmites communis Seedlings to Low-light Stress in the Sanjiang Plain*
1中国科学院亚热带农业生态研究所 长沙 410125
2湖南省林业科学院 长沙 410004
3湖南农业大学生物科技学院 长沙 410128
LI Youzhi ZHANG Canming XIE Yonghong HUANG Jishan Yang Gang
1Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
2Hunan Academy of Forestry, Changsha 410004, China
3College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
Deyeuxia angustifolia Phragmites communis light intensity seedling growth morphology Sanjiang Plain
Q945.78 (23)
采用5种低光处理(100、200、400、600、1 000 lx)研究了小叶章和芦苇幼苗成活和生长对低光胁迫的响应. 两种
1 000 lx. 两种植物幼苗生长参数(根重、茎重、叶重、总生物量、绝对生长速率、相对生长速率、净同化速率)都随光照
强度的升高显著增大,而叶生物量比和形态学参数(叶面积比、比叶面积)随光照强度的升高显著降低. 可见,小叶章
和芦苇幼苗生长明显受到光照的影响,幼苗可通过增大光合器官的投入适应低光环境. 相对芦苇而言,小叶章幼苗在
之一. 图6 表1 参31
Responses of two wetland plant seedlings (Deyeuxia angustifolia and Phragmites communis) to low-light stress
in terms of their survival and growth were investigated in the Sanjiang Plain by using five light treatments(100, 200,
400, 600, 1 000 lx). The results showed that the survival ratios of the plants were significantly increased with increasing of
light intensity, and the lowest light intensities for total survival of D. angustifolia and P. communis were 400 and 1 000 lx,
respectively. Seedling growth parameters (root mass, shoot mass, leaf mass, total biomass, absolute growth rate, relative growth rate, net assimilation rate) of the two plants were also positively related to increased light intensity. However, leaf mass ratio and morphological parameters (leaf area ratio, specific leaf area) decreased with the increasing of light intensity, indicating that seedling growth of both plants was significant affected by light availability and that the strategy for adaptation to lowlight environments was to increase biomass allocation to light-tissue leaf. Morphological plasticity of D. angustifolia seedlings was higher than that of P. communis. The data obtained from this research indicate that D. angustifolia has a stronger ability to endure low-light stress, which might account for that D. angustifolia is a dominant species and P. communis is incidental in the Sanjiang Plain. Fig 6, Tab 1, Ref 31


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国家重点基础研究发展规划项目(No. 2006CB403301)和国家自然科学基金项目(No. 30670201)资助
更新日期/Last Update: 2009-03-05