Ladawan Atipanumpai

Acacia mangium : Studies on the genetic variation in ecological and physiological characteristics of a fastgrowing plantation tree species

Atipanumpai L. (1989). Acacia mangium : Studies on the genetic variation in ecological and physiological characteristics of a fastgrowing plantation tree species. Acta Forestalia Fennica no. 206 article id 7653. https://doi.org/10.14214/aff.7653

Abstract

Genetic variation in the physiological characteristics and biomass accumulation of Acacia mangium Willd. was studied in both field and laboratory conditions. Variation in the growth characteristics, foliar nutrient concentration, phyllode anatomy and stomatal frequency was analysed in 16 different origins under field conditions in Central Thailand. Family variation and heritability of growth and flowering frequency were calculated using 20 open-pollinated families at the age of 28 months. The effect of environmental factors on diameter growth in different provenances is also discussed.

Under laboratory conditions, such physiological characteristics as transpiration rate, leaf conductance and leaf water potential were measured at varying soil moisture conditions. The responses of photosynthesis, photorespiration and dark respiration as well as the CO₂ compensation point to temperature and irradiance were also investigated. All physiological characteristics indicated differences among provenances. An attempt was made to relate the results obtained in the laboratory to the growth performance in the field. Recommendations on provenance selection for the planting of A. mangium in Thailand are also given.

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Keywords
photosynthesis; provenance; water stress; foliar analysis; stomata; heritability; half-sib families; photorespiration; dark respiration; transpiration; Acacia mangium; carbon dioxide compensation; dendrometry; leaf conductance

Published in 1989

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Available at https://doi.org/10.14214/aff.7653 | Download PDF