Role of clonal integration in life strategy of sandy dune plant, Eremosparton songoricum (Litv.) Vass (Fab aceae) : experimental

• Autorzy: Wang J. , Shi X. , Yin L. , Zhang D.
• Języki publikacji: EN

Abstrakty

EN

A systematic knowledge of clonal integration is an important step in understanding the ecological implication of clonality. This study focuses on the performance of rhizomatous clonal plants under different situations and we proposed a hypothesis that clonal integration will significantly improve the disturbance and drought resistance ability and the competitive ability of Eremosparton songoricum. In 2009, the experiments were carried out in two natural populations. Rhizome was either severed (S) or not (I) in four treatments that include control (C), drought (D), disturbance (E), and competition (F). The biomass and the root-shoot ratio were compared in different experimental treatments. Under drought and disturbance treatments, the biomass of ramet with severed rhizome was significantly less than that of intact ramets, and both were lower than the samples under the control treatment. The differences in root-shoot ratio were opposite to the biomass in drought and disturbance treatments. The ramet biomass under the competition treatment had the same result as that under the drought and disturbance treatments. However, the root-shoot ratio was highest in FS (competition treatment with severed rhizome) and lowest in FI (competition treatment with intact rhizome) under competition and control treatments. Our results suggest that clonal integration enhances the disturbance and drought resistance ability rather than the competitive ability of Eremosparton songoricum. This may be one of the various reasons why E. songoricum is distributed in sand dunes of droughty conditions with more disturbances but less competition. Integration proved to be important for the species occupying adverse patches. For E. songoricum, the existence of rhizome reduces the impact of environmental stress and improves the fitness in association with its location at the dune.

Słowa kluczowe

EN

clonal plant; Eremosparton songoricum; rhizome; root-shoot ratio; water content

PL

Eremosparton songoricum; kłącze; zawartość wody

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2011
• Tom: Vol. 59, nr 3
• Strony: 455--461
• Opis fizyczny: Bibliogr. 26 poz.,Rys., tab.,

Twórcy

autor

Wang J.

autor

Shi X.

autor

Yin L.

autor

Zhang D.

• Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology Geography, Chinese Academy of Sciences, Urumqi, 830011, P.R. China ; Graduate University of Chinese Academy of Science, Beijing 100049, P.R. China,

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