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	Phenotypic plasticity in response to the heterogeneous water supply in the rhizomatous grass species, Calamagrostis epigejos in the Mu Us Sandy Land of China
	Zhang C. Y. ; Yu F. H. ; Chen Y. F. ; Dong M.
	2003
关键词	phenotypic plasticity heterogeneous soil water Calamagrostis epikejos ramet pairs rhizome clonal plants Maowusu (Mu Us) Sandy Land psammochloa-villosa severing rhizome integration growth
英文摘要	Calamagrostis epigejos (L.) Roth. is a perennial grass with slender and long rhizome segments between interconnected neighbor ramets. To investigate the phenotypic plasticity in response to the heterogeneous soil water supply, ramet pairs of the species were subjected to heterogeneous water supply by which either mother ramets or daughter ramets were in high or low soil water supply, respectively, in the Maowusu (Mu Us) Sandy Land of Nei Mongol. The results showed that the phenotypic characteristics of the individual ramets of C epigejos were greatly influenced by the heterogeneous water supply. The ramets treated with high water supply significantly produced more new rhizomes and more offspring (ramets), and accumulated more shoot biomass, and allocated more biomass to their shoots than those treated with low water supply. In comparison with the daughter ramets in homogeneous soil water supply, phenotypic characteristics, in terms of new rhizome growth, the production of new offspring, and the biomass allocation pattern, of the daughter ramets within the pairs of the species were not significantly changed, no matter that high or low soil water supply to mother ramets. The phenotypic responses of mother ramets to soil water supply were similar to those of daughter ramets. From these results, it is inferred that the interconnected ramets of C epigejos response phenotypically to their local soil water rather than to the soil water experienced by the interconnected ramets. The interconnected ramets of C epigejos might be independent of each other in water relationship, although they are physically interconnected with rhizome segments. The physiological independence of interconnected ramets might facilitate the risk spreading and thus enhance the genet survivorship under the frequent drought stresses in Mu Us Sandland.
出处	Acta Botanica Sinica
卷	45
期	10
页	1210-1217
收录类别	SCI
语种	英语
ISSN号	0577-7496
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/22427]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhang C. Y.,Yu F. H.,Chen Y. F.,et al. Phenotypic plasticity in response to the heterogeneous water supply in the rhizomatous grass species, Calamagrostis epigejos in the Mu Us Sandy Land of China. 2003.

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