Clonal integration enhances the performance of a clonal plant species under soil alkalinity stress

PloS One
Wenjun ZhangYingjun Zhang

Abstract

Clonal plants have been shown to successfully survive in stressful environments, including salinity stress, drought and depleted nutrients through clonal integration between original and subsequent ramets. However, relatively little is known about whether clonal integration can enhance the performance of clonal plants under alkalinity stress. We investigated the effect of clonal integration on the performance of a typical rhizomatous clonal plant, Leymus chinensis, using a factorial experimental design with four levels of alkalinity and two levels of rhizome connection treatments, connected (allowing integration) and severed (preventing integration). Clonal integration was estimated by comparing physiological and biomass features between the rhizome-connected and rhizome-severed treatments. We found that rhizome-connected treatment increased the biomass, height and leaf water potential of subsequent ramets at highly alkalinity treatments but did not affect them at low alkalinity treatments. However, rhizome-connected treatment decreased the root biomass of subsequent ramets and did not influence the photosynthetic rates of subsequent ramets. The biomass of original ramets was reduced by rhizome-connected treatment at the highes...Continue Reading

References

Aug 31, 2006·Bulletin of Mathematical Biology·Liang Li, Gang Wang
Jul 5, 2007·Oecologia·Sara GómezJosef F Stuefer
Feb 3, 2009·Plant, Cell & Environment·Hans De KroonMichael J Hutchings
Oct 1, 1997·Trends in Ecology & Evolution·M J Hutchings, D K Wijesinghe

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