XI WORLD FORESTRY CONGRESS

Antalya, Turkey, 13 to 22 October 1997


VOLUME 3, TOPIC 12


    WATER STRESS TOLERANCE IN SEEDLINGS OF EUCALYPTUS CLONES

    Lemcoff, J.H.1; Garau, A.; Guarnaschelli, A.; Prystupa, P. and Bascialli, M.

    Inter- and intra-provenance variation in relation to water stress was examined for five E. camaldulensis Dehn clones and one of E. tereticornis Sm. Behaviour after a drought cycle was examined, evaluating tissue water parameters and leaf area expansion, which is considered to be the plant feature most sensitive to stress. Leaf expansion was restricted in all the clones. Osmotic potential at full turgor decreased in a significant way in clones 106, 109 and 107. Water stress increased the cell wall elasticity modulus in all cases. The increase attenuated the effect of the osmotic adjustment and could explain the weak association between osmotic adjustment and leaf expansion.

    Keywords: Eucalypts, interprovenance variation, water stress tolerance, osmotic adjustment, cell wall elasticity.

    1 Associate Professor (PhD in Ecology), Facultad de Agronomía, Universidad de Buenos Aires. Av. San Martín 4453 (1417), Buenos Aires, Argentina., e-mail:lemcoff@ifeva.edu.ar



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