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[1]李有志,张灿明,谢永宏,等.三江平原小叶章和芦苇幼苗生长对低光胁迫的响应[J].应用与环境生物学报,2009,15(01):53-58.[doi:10.3724/SP.J.1145.2009.00053]
 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]
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三江平原小叶章和芦苇幼苗生长对低光胁迫的响应()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
15卷
期数:
2009年01期
页码:
53-58
栏目:
研究论文
出版日期:
2009-02-25

文章信息/Info

Title:
Growth Responses of Deyeuxia angustifolia and Phragmites communis Seedlings to Low-light Stress in the Sanjiang Plain*
作者:
李有志张灿明谢永宏黄继山杨刚
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
Author(s):
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
关键词:
小叶章芦苇光照强度幼苗生长形态学三江平原
Keywords:
Deyeuxia angustifolia Phragmites communis light intensity seedling growth morphology Sanjiang Plain
分类号:
Q945.78 (23)
DOI:
10.3724/SP.J.1145.2009.00053
文献标志码:
A
摘要:
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
湿地植物幼苗的成活率均随着光照强度的升高而显著增大,小叶章和芦苇幼苗全部成活的光照强度下限分别为400、
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
低光胁迫下形态可塑性大,小叶章更低的存活光强下限及更强的形态可塑性表明小叶章幼苗适应低光胁迫的能力大
于芦苇,这可能是小叶章能成为三江平原典型草甸、湿草甸和沼泽群落的优势种,而芦苇只能成为伴生种的主要原因
之一. 图6 表1 参31
Abstract:
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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备注/Memo

备注/Memo:
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