The results showed that the levels of endogenous polyamines in embryogenic calli were higher than those in non - embryogenic calli ; the changes of endogenous polyamines in the process of somatic embryogenesis approximately showed an " m " curve during embryogenic callus and globular embryoids ; the content of polyamines was the 2 turning - point stages in the changes of endogenous polyamines in somatic embryogenesis ; the changes of endogenous polyamines were earlier than those of morphogenesis 结果表明:龙眼胚性愈伤组织中内源多胺含量比非胚性愈伤组织高;体胚发生过程中内源多胺含量变化趋势大致呈" m "状,在胚性愈伤组织和球形胚阶段转折;内源多胺含量的变化先于形态学的变化。
This review focuses on morphological and physiological reactions of fruit tree to water stress . leaf area , root growth and microstructure of leaves and roots were investigated . some physiological and biochemical index of fruit tree leaves and roots under water stress , such as variations of stomatal aperture , photosynthesis , photoinhibition , metabolism of lipoxygenase , content of proline , nuclear acid and endogenous phytohormones , were summarized 从水分胁迫对果树叶、根的形态指标及显微结构,叶片气孔行为、光合作用、光抑制、活性氧代谢、脂氧合酶代谢、多胺代谢、脯氨酸、核酸代谢、内源激素变化等生理生化方面综述了近十几年来的研究成果,为全面研究果树抗旱机理及进一步制定抗旱措施奠定理论基础。