内生真菌感染对不同地理种群羽茅的生理生态影响
首发时间:2011-04-27
摘要:Neotyphodium内生真菌与宿主的共生关系问题一直是一个研究的热点,而实际上二者的关系可能比认识到的更为复杂。本文为田间盆栽实验,研究了内生真菌对不同地理种群的羽茅在不同生长阶段的影响。研究结果表明,Neotyphodium内生真菌对羽茅的影响与宿主羽茅所处的原生生境和不同的生长发育阶段有关,羽茅生长前期,内生真菌显著提高了海拉尔种群植株的株高、比叶重、水分利用效率以及光合氮利用效率;羽茅生长后期,内生真菌对锡林浩特定位站羽茅的光合氮利用效率有显著的贡献。感染内生真菌对两个地理种群中羽茅的生物量的分配,叶绿素含量,叶片氮含量都没有显著的影响。
关键词: Neotyphodium内生真菌 羽茅 光合特性
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Physiological Ecological Effect of Endophyte Infection on Achnatherum sibiricum in different populations in Inner Mongolia Steppe
Abstract:It has been a focus of research about the relationship between Neotyphodium endophytic fungi and host symbiotic, but in fact, the relationship between them may be more complicated than realized. In this experiment we studied the effect of endophyte infection in different growth stages of A. sibiricum between different populations in Inner Mongolia Steppe. The results showed that the effect of Neotyphodium on A. sibiricum related to the original environment and different growth stages of A.sibiricum. At seedling stage, endophyte infection significantly increased plant height, leaf mass per area, water use efficiency and photosynthetic nitrogen use efficiency of Hailar population. At later growth stage, endophyte infection made a significant contribution to the photosynthetic nitrogen use efficiency of Xinlinhot population. There were no significant differences in biomass distribution, chlorophyll content and leaf nitrogen content of A. sibiricum in two populations.
Keywords: Neotyphodium Achnatherum sibiricum Photosynthetic characteristics
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