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在茶树新梢生长旺期,用~(14)C 标记的对-氯苯氧乙酸(P_(51)),对四年生福丁大毫茶树成熟叶片进行定位定量一次性涂布处理,显微放射自显影图象结果表明:P_(51)进入茶树各器官比较迅速,处理后8小时,在茎、叶、顶芽和腋芽中即可见到~(14)C-P_(51)的踪迹。茎、叶主脉维管束是 P_(51)在茶树体内得以进行反复运转的主要通道,而且这种运输表现为多向性。通过叶片的渗入和茎、叶脉、叶柄维管束的运转,进入茶树体内的 P_(51),最终主要是分布和积累在茎的形成层、叶肉栅栏和海绵组织、顶芽和腋芽的分生组织及已分化的小叶中。这种运输、分布和积累特性与 P_(51)对茶树营养生长的促进和生殖生长的抑制有着密切关系。
In the growing season of tea shoots, the mature leaves of four-year-old Fortunella dahurica were treated with ~ (14) C-labeled p-chlorophenoxyacetic acid (P_ (51) The results of autoradiography showed that the P_ (51) entered the organs of tea plant more rapidly, and the trace of ~ (14) C-P_ (51) could be seen in stem, leaf, apical bud and axillary bud 8 hours after the treatment. The stem and leaf main vascular bundles were the main channels through which P_ (51) could be repeatedly operated in the tea plant, and the transport was multidirectional. Through the infiltration of leaves and the operation of stems, veins and petiole vasculature, P_ (51) entered into the tea plantation and eventually distributed and accumulated mainly in the stem cambium, mesophyll and spongy tissue, meristems of terminal buds and axillary buds And differentiated lobular. This transport, distribution and accumulation characteristics were closely related to the promotion of vegetative growth and inhibition of reproductive growth by P_ (51).