LiLiuBerninger2004

Référence

Li, C., Liu, S. and Berninger, F. (2004) Picea seedlings show apparent acclimation to drought with increasing altitude in the eastern Himalaya. Trees - Structure and Function, 18(3):277-283.

Résumé

We measured plant structural and physiological responses of two sympatric Picea species, Picea likiangensis (Franchet) E. Pritzel var. balfouriana and Picea asperata Masters var. retroflexa to altitude close to the treeline in the eastern Himalaya. Most measured tree characteristics differed between different altitudes, between different ages, and between shaded and un-shaded treatments. Both P. likiangensis and P. asperata had lower foliage area/stem cross-sectional area ratios, smaller specific leaf areas, higher root mass/foliage area ratios, and less negative ?13C at 3,900 m than at 3,600 m altitude, and in the un-shaded treatment than in the shaded treatment. The 7- and 9-year-old seedlings also showed lower foliage area/stem cross-sectional area ratios, higher root mass/foliage area ratios and less negative ?13C than younger seedlings. Shading resulted in an increase of biomass accumulation at all altitudes. A close relationship, independent of altitude, was observed between ?13C and specific leaf area, suggesting that internal resistance could limit CO2 diffusion to the site of carboxylation. The results indicate that, in spite of greater water availability, trees at higher altitudes show quite a number of apparent acclimations to drought. © Springer-Verlag 2003.

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@ARTICLE { LiLiuBerninger2004,
    AUTHOR = { Li, C. and Liu, S. and Berninger, F. },
    TITLE = { Picea seedlings show apparent acclimation to drought with increasing altitude in the eastern Himalaya },
    JOURNAL = { Trees - Structure and Function },
    YEAR = { 2004 },
    VOLUME = { 18 },
    PAGES = { 277-283 },
    NUMBER = { 3 },
    NOTE = { 09311890 (ISSN) Cited By (since 1996): 5 Export Date: 24 April 2007 Source: Scopus CODEN: TRESE Language of Original Document: English Correspondence Address: Li, C.; Chengdu Institute of Biology; Chinese Academy of Sciences 610041 Chengdu, China; email: licy@cib.ac.cn References: Anderson, J.E., William, J., Kriedemann, P., Austin, M.P., Farquhar, G.D., Correlations between carbon isotope discrimination and climate of native habitats for diverse eucalypt taxa growing in a common garden (1996) Aust J Plant Physiol, 23, pp. 311-320; Brodribb, T., Hill, R.S., The photosynthetic drought physiology of a diverse group of southern hemisphere conifer species is correlated with minimum seasonal rainfall (1998) Funct Ecol, 12, pp. 465-471; Cordell, S., Goldstein, G., Mueller-Dombois, D., Webb, D., Vitousek, P.M., Physiological and morphological variation in Metrosideros polymorpha, a dominant Hawaiian tree species, along an altitudinal gradient: Role of phenotypic plasticity (1998) Oecologia, 113, pp. 188-196; 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    ABSTRACT = { We measured plant structural and physiological responses of two sympatric Picea species, Picea likiangensis (Franchet) E. Pritzel var. balfouriana and Picea asperata Masters var. retroflexa to altitude close to the treeline in the eastern Himalaya. Most measured tree characteristics differed between different altitudes, between different ages, and between shaded and un-shaded treatments. Both P. likiangensis and P. asperata had lower foliage area/stem cross-sectional area ratios, smaller specific leaf areas, higher root mass/foliage area ratios, and less negative ?13C at 3,900 m than at 3,600 m altitude, and in the un-shaded treatment than in the shaded treatment. The 7- and 9-year-old seedlings also showed lower foliage area/stem cross-sectional area ratios, higher root mass/foliage area ratios and less negative ?13C than younger seedlings. Shading resulted in an increase of biomass accumulation at all altitudes. A close relationship, independent of altitude, was observed between ?13C and specific leaf area, suggesting that internal resistance could limit CO2 diffusion to the site of carboxylation. The results indicate that, in spite of greater water availability, trees at higher altitudes show quite a number of apparent acclimations to drought. © Springer-Verlag 2003. },
    KEYWORDS = { Carbon isotope composition Foliage area/stem cross-sectional area ratio Root mass/foliage area ratio Specific leaf area Picea Picea asperata Picea likiangensis },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.04 },
}

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