Changes in carbohydrate content and membrane stability of two ecotypes of Calamagrostis arundinacea growing at different elevations in the drawdown zone of the Three Gorges Reservoir.
Changes in carbohydrate content and membrane stability of two ecotypes of Calamagrostis arundinacea growing at different elevations in the drawdown zone of the Three Gorges Reservoir.
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在三个峡谷储层的下降区的不同高程中，两种生态的calamagrostis arundinacea生态型的碳水化合物含量和膜稳定性的变化。
DOI：
10.1371/journal.pone.0091394
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Su X
中科院分区：
文献类型：
--
作者：
Lei S;Zeng B;Yuan Z;Su X
三峡工程造成了许多生态问题。利用可利用植物进行生态恢复是减轻环境影响的有效途径。在退耕带的试验田种植了两种多年生耐淹生态型的黄菖蒲。两种植物生态型对降水区洪涝胁迫的响应尚不清楚。对生长在不同海拔降水区的“矮”型和“绿”型两种生态型的黄花蒿进行了水淹胁迫下植物存活的两个关键因子碳水化合物含量和膜稳定性的研究。在海拔175、170、162、160、158、155、152和149 m的8个海拔高度采集了2种植物生态型的活茎和死茎。测定活茎中可溶性糖、淀粉、丙二醛（MDA）含量及质膜通透性。矮秆和绿色黄花菊的最低生存海拔分别为160 m和158 m。两种生态型的活茎可溶性糖含量均随海拔升高而降低，海拔170 m处的含量低于海拔175 m处的含量。绿黄花活茎的MDA含量和质膜透性不随海拔的降低而增加，而矮生黄花在海拔162 m处的MDA含量和质膜透性显著高于海拔175 m处。两种生态型的碳水化合物含量，尤其是可溶性糖含量对水淹胁迫的敏感性大于膜稳定性。绿黄花比矮黄花具有更高的耐淹性，因此绿黄花比矮黄花更适合在低海拔地区种植。
The Three Gorges project has caused many ecosystem problems. Ecological restoration using readily-available plants is an effective way of mitigating environmental impacts. Two perennial submergence-tolerant ecotypes of Calamagrostis arundinacea were planted in an experimental field in the drawdown zone. Responses of the two plant ecotypes to flooding stress in the drawdown zone were unknown. Carbohydrate content and membrane stability, two key factors for survival of plants under flooding stress, of two ecotypes (designated “dwarf” and “green”) of C. arundinacea growing at different elevations of the drawdown zone were investigated. Live stems (LS) and dead stems (DS) of the two plant ecotypes at eight elevations (175, 170, 162, 160, 158, 155, 152 m and 149 m) were sampled. Contents of soluble sugar, starch and malondialdehyde (MDA), as well as plasma membrane permeability of live stems were measured. The lowest elevations for survival of dwarf and green C. arundinacea were 160 m and 158 m, respectively. Soluble sugar content of live stems of both ecotypes decreased with elevation, with amounts from an elevation of 170 m being lower than from an elevation of 175 m. MDA content and plasma membrane permeability in live stems of green C. arundinacea did not increase with the decrease in elevation, while these measures in dwarf C. arundinacea from an elevation of 162 m were significantly higher than from an elevation of 175 m. Carbohydrate content, especially soluble sugar content, in both ecotypes was more sensitive to flooding stress than membrane stability. Green C. arundinacea had a higher tolerance to submergence than dwarf C. arundinacea, and thus green C. arundinacea can be planted at lower elevations than dwarf C. arundinacea.
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影响因子：
--
作者：
Shen Jian-Hong;Zeng Bo;Huang Wen-Jun
通讯作者：
Huang Wen-Jun
光合适应对于两种河岸物种的光合作用和生长的淹没后恢复很重要
影响因子：
4.2
作者：
Luo, Fang-Li;Nagel, Kerstin A.;Matsubara, Shizue
通讯作者：
Matsubara, Shizue
DOI：
10.3773/j.issn.1005-264x.2008.05.001
发表时间：
2008-09-01
期刊：
Zhiwu Shengtai Xuebao
影响因子：
--
作者：
Wang Hai-Feng;Zeng Bo;Luo Fang-Li
通讯作者：
Luo Fang-Li
DOI：
10.1016/0006-291x(65)90316-5
发表时间：
1965-01-01
影响因子：
3.1
作者：
HEATH, RL;PACKER, L
通讯作者：
PACKER, L
影响因子：
4.2
作者：
Pena-Fronteras, Jennifer T.;Villalobos, Mizpah C.;Johnson, David E.
通讯作者：
Johnson, David E.