Department of Agronomy, University of California, Davis, California 95616.
Plant Physiol. 1968 Sep;43(9 Pt B):1471-9.
This paper reviews the physiological effects of the principal environmental factors which can influence the process of leaf abscission. The factors include temperature, light, water, gases, mineral elements, soil conditions, and parasitic organisms. These factors influence a variety of internal physiological conditions and processes which in turn may either accelerate or retard the process of abscission. The most important internal factors include A) sugar, pectin, cellulose, and other carbohydrates; B) energy-yielding respiration; C) enzymic reactions; D) amino acids, purines, and other nitrogenous substances; E) levels of plant hormones; and F) the molecular biological pathway. The current information is consistent with the hypothesis that the environmental factors act in leaf abscission via direct or indirect influences on the synthesis or reaction rate of enzymes.
本文综述了主要环境因素对叶片脱落过程的生理影响。这些因素包括温度、光照、水分、气体、矿物质元素、土壤条件和寄生生物。这些因素影响着各种内部生理条件和过程，进而可能加速或延缓脱落过程。最重要的内部因素包括：A）糖、果胶、纤维素和其他碳水化合物；B）产能呼吸；C）酶反应；D）氨基酸、嘌呤和其他含氮物质；E）植物激素水平；F）分子生物学途径。目前的信息支持这样一种假设，即环境因素通过直接或间接影响酶的合成或反应速率来作用于叶片脱落。
