邓恩桉嫁接种子园开花生理生化特性比较

以邓恩桉嫁接种子园为研究材料,比较邓恩桉开花植株与未开花植株的叶绿体色素、光合生理特性、可溶性蛋白质、可溶性糖以及游离氨基酸。结果表明：邓恩桉未开花植株叶绿体色素含量、气孔导度、蒸腾速率、表观量子效率明显比开花植株高,而开花植株净光合速率、水分利用效率、胞间CO2浓度比未开花植株低,说明开花植株比未开花植株同化能力降低,异化能力增强,光合系数小;开花植株的可溶性蛋白质、可溶性糖以及游离氨基酸含量均高于未开花植株。通过比较开花和未开花邓恩桉嫁接植株光合生理和生理生化特性,为邓恩桉嫁接种子园开花结实研究提供理论基础。

Comparison of the Physiological and Biochemical Characteristics of Flowering for Grafted Seed Orchard of Eucalyptus dunnii

Grafted seed orchard 0f E.dunnii as research material, the chloroplast pigment, photosynthetic physiology, soluble protein, soluble sugar and free amino acid of flowering and non-flowering plants were compared. The results showed that: the chloroplast pigment, stomatal conductance, transpiration rate, apparent quantum efficiency of non-flowering plants were more obvious high than that of flowering plants, but the blossom leaf net photosynthetic rate, water use efficiency, intercellular CO2 concentration of flowering plants were lower than that of non-flowering plants. Comparing with non-flowering plants, flowering plants had lower assimilation ability and stronger dissimilation ability, and photosynthetic coefficient was smaller in flowering plants; the soluble protein, soluble sugar and free amino acid content of flowering plants were higher than that of non-flowering plants. By comparing the photosynthetic physiology, physiological and biochemical characteristics of flowering and non-flowering plants, was conducive to the blossom research of grafted seed orchard.