我们的网站为什么显示成这样?

可能因为您的浏览器不支持样式,您可以更新您的浏览器到最新版本,以获取对此功能的支持,访问下面的网站,获取关于浏览器的信息:

|本期目录/Table of Contents|

模拟干旱胁迫下构树和桑树的生理特征比较

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2011年01期
页码:
92-96
栏目:
植物生理学与分子生物学
出版日期:
2011-01-15

文章信息/Info

Title:
Comparison of the physiological characteristics of paper mulberry (Broussonetia papyrifera) and mulberry (Morus alba) under simulated drought stress
作者:
吴沿友12 梁铮1 邢德科2
1.现代农业装备与技术省部共建教育部重点实验室/江苏省重点实验室,江苏大学农业工程研究院, 江苏 镇江 212013; 2.中国科学院 地球化学研究所 环境地球化学国家重点实验室, 贵阳 550002
Author(s):
WU Yan-You12 LIANG Zheng1 Xing De-Ke2
1.Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education & Jiangsu Province, Institute of agricultural engineering, Jiangsu University, Zhenjiang 212013, China; 2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
关键词:
构树 桑树 聚乙二醇 碳酸酐酶 叶绿素荧光 喀斯特
Keywords:
paper mulberry(Broussonetia papyrifera) mulberry(Morus alba) polyethylene glycol(PEG 6000) carbonic anhydrase chlorophyll fluorescence karst
分类号:
-
DOI:
-
文献标识码:
A
摘要:
在不同浓度聚乙二醇(PEG 6000)的处理下,测定构树和桑树的碳酸酐酶活性、光响应曲线、二氧化碳响应曲线和叶绿素荧光等指标,比较它们的抗干旱能力。结果表明:(1)构树的碳酸酐酶活力变化不显著,而桑树的碳酸酐酶活力不同的PEG 6000浓度间差异较大。(2)构树的净光合速率受PEG 6000的影响较小,而桑树受到抑制较大。(3)构树的PSⅡ原初光能转化效率(Fv/Fm)和PSⅡ实际光合效率ΦPSⅡ受到PEG影响不显著,而桑树则明显受到PEG的抑制。构树的PSⅡ原初光能转化效率(Fv/Fm)和PSⅡ实际光合效率ΦPSⅡ要比桑树高,光化学淬灭系数(qP)和电子传递速率(ETR)也明显高于桑树。稳定的碳酸酐酶、较强的光合能力是构树适应岩溶干旱环境的重要机制。
Abstract:
Under the treatment of different concentrations of polyethylene glycol(PEG 6000),the carbonic anhydrase activity,photosynthetic responses to light and CO2,and chlorophyll fluorescence characteristics in leaves of two woody plant species,paper mulberry(Broussonetia papyrifera)and mulberry(Morus alba),were determined. The drought resistance of the two species plants was compared. The results indicated that the activity of carbonic anhydrase in paper mulberry did not vary significantly. There are significant differences of the activity of carbonic anhydrase in mulberry among treatments with different concentration of PEG 6000. PEG 6000 had little influence on net photosynthetic rate of paper mulberry,but caused significant inhibition on mulberry. No significant variation of maximum quantum yield of photosystem II(Fv/Fm)and actual photosynthetic efficiency of PS II(ΦPSⅡ)of paper mulberry among the treatments of PEG was observed,but those of mulberry were significantly inhibited by PEG. Fv/Fm and ΦPSⅡ of paper mulberry was also higher than those of mulberry. The photochemical quenching coefficient(qP)and electron transport rate(ETR)of paper mulberry was significantly higher than those of mulberry. The stable carbonic anhydrase and the strong photosynthetic capacity is an important mechanism for paper mulberry to adapt to karstarid environment.

参考文献/References

-

备注/Memo

备注/Memo:
-
更新日期/Last Update: 2011-04-07