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2011 | 59 | 3 |

Tytuł artykułu

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

Warianty tytułu

Języki publikacji

EN

Abstrakty

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, th e 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.

Wydawca

-

Rocznik

Tom

59

Numer

3

Opis fizyczny

p.455-461,fig.,ref.

Twórcy

autor
  • Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, P.R. China
autor
autor
autor

Bibliografia

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  • Bach C.E. 2000 – Effects of clonal integration on response to sand burial and defoliation by the dune plant Ipomoea pes-caprae (Convolvulaceae) – Aust. J. Bot. 48: 159–166.
  • Brezina S., Koubek T., Munzbergova Z., Herben T. 2006 – Ecological benefits of integration of Calamagrostis epigejos ramets under field conditions – Flora, 201: 461–467.
  • Bullock J.M., Mortimer A.M., Begon M. 1994 – Physiological integration among tillers of Holcus lanatus: age-dependence and responses to clipping and competition – New Phytol. 128: 737–747
  • Chen C.D., Zhang L.Y., Hu W.K. 1983 – The basic characteristics of plant communities, flora and their distribution in the sandy district of Gurbantunggut Desert – Acta Phytoecologica et Geobotanica Sinica, 7: 89–99.
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  • Liu F.H., Yu F., Ye X., Dong M. 2007 – Clonal integration modifies growth and reproduction of the bunchgrass cleistogenes squarrosa in nutrient-heterogeneous conditions – Ekol. Bratislava, 26: 352–361.
  • Liu H.D., Yu F.H., He W.M., Chu Y., Dong M. 2007 – Are clonal plants more tolerant to grazing than co-occurring non-clonal plants in inlanNiva M., Svensson B.M., Karlsson P.S. 2003 – Nutrient resorption from senescing leaves of the clonal plant Linnaea borealisin relation to reproductive state and resource availability – Funct. Ecol. 17: 438–444.
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  • Roiloa S.R., Retuerto R. 2006 – Small-scale heterogeneity in soil quality influences photosynthetic efficiency and habitat selection in a clonal plant – Ann. Bot-London, 98: 1043–1052.
  • Stuefer J.F., Gomez S., van Molken T. 2004 – Clonal integration beyond resource sharing: implications for defence signalling and disease transmission in clonal plant networks – Evol. Ecol. 18: 647–667.
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Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

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