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柑橘果实遮光处理对发育中的果实光合产物分配、糖代谢与积累的影响

陈俊伟, 张上隆, 张良诚, 徐昌杰, 陈昆松

浙江大学农业与生物技术学院园艺系.浙江,杭州 310029

摘要

研究了柑橘果实膨大初期遮光处理对果皮色素、果实含糖量、光合产物在果实内的分配及果实中蔗糖代谢相关酶活力变化的影响。结果表明:遮光处理使果皮中的叶绿素含量迅速降低而类胡萝卜素积累缓慢,蔗糖的相对含量则明显上升。遮光处理还促进了光合产物向果皮运输,相应地降低了汁囊中光合产物分配比率,使果实汁囊中蔗糖含量下降。果皮中SS、SPS和转化酶活力在遮光处理后均有较大的提高,而汁囊中则差异不大。上述结果表明,在果实自身光合作用被抑制的条件下,果皮是通过提高酶活力来增强库强度,从而使其在与汁囊竞争中获得更多的光合产物,造成汁囊含糖量下降。

关键词： 柑橘; 果实遮光; 色素; 光合产物; 糖积累; 蔗糖代谢酶

Effects of fruit shading on photosynthate partitioning, sugar metabolism and accumulation in developing satsuma mandarin (Citrus unshiu Marc.) fruit

Chen Junwei, Zhang Shanglong, Zhang Liangcheng, Xu Changjie, Chen Kunsong

Department of Horticulture,College of Agriculture and Biotechnology,Zhejiang University.Hangzhou 310029,Zhejiang

Abstract

These results indicate that in the absence of fruit photosynthesis, the sink strength of peel was strengthened by elevating activities of sucrose-metabolizing enzymes in this tissue, thus leading to division more photosynthates to peel and corresponding decrease of sugar content in juice sacs of satsuma mandarin.

Key words: Citrus unshiu;Fruit shading;Pigment;Photosynthate;Sugar accumulation;Sucrose-metabolizing enzyme

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引用本文：

陈俊伟, 张上隆, 张良诚, 徐昌杰, 陈昆松. 柑橘果实遮光处理对发育中的果实光合产物分配、糖代谢与积累的影响[J]. 生理学报 2001; 53 (6): .

Chen Junwei, Zhang Shanglong, Zhang Liangcheng, Xu Changjie, Chen Kunsong. Effects of fruit shading on photosynthate partitioning, sugar metabolism and accumulation in developing satsuma mandarin (Citrus unshiu Marc.) fruit. Acta Physiol Sin 2001; 53 (6): (in Chinese with English abstract).