【作者】 温陟良； 张良诚； 陈志辉； 张放；

【Author】 Wen Zhiliang,Zhang Liangchen,Cheng Zhihui,Zhang Fang( Agricultural University of Hebei, Bonding 071001; Zhejiang Agricultural University, Huangzhou 310029)

【机构】 河北农业大学园艺系； 浙江农业大学园艺系；

【摘要】 本文以枳砧温州蜜柑为试材,应用¹⁴C示踪技术,研究了环剥及外源激素对柑桔叶片光合产物运转分配的影响,结果表明:环剥和环切均能阻止环剥（切）口上方叶片的光合产物向环剥（切）口下方的运输.对一年生柑桔主干环剥1mm宽,环剥伤口大约在20d接通;主干环切两圈后,环切口愈合接通则需要10～20d时间.但刚接通的伤口对光合产物的运输率并不高,要完全恢复其运输功能,则需要更长的时间.激素对柑桔光合产物运转分配的影响与激素种类和植株的生长发育状态有关.旺盛生长的幼叶应用GA和BA后,能明显增加光合产物的输入;而应用ABA后,有减少光合产物输入的趋势.成熟叶片应用以上3种激素后,仅能改变标记叶光合产物向根系的分配,而不能使应用叶本身输入光合产物.GA能影响到与处理枝条相邻近的枝条,而BA的作用范围则仅限于应用枝条本身.更多还原

【Abstract】 By applying the ~14C tracer technique, the effects of girdling , ring - cutting and exogenous hormones on the translocation and partitioning of materials used were 1 - year - old field seedlings trees of sat-suma mandarine (Citrus unshiu Marc. on Poncirus trifoliata prevented translocation of photosynthates from leaves located above the site of operation. For the treatment where a ring of bark 1 mm in width on the trunk of a 1 - year - old seedling was removed, approximately 20 days were required to bridge up the gap in the interrupted bark and reestablish the connection between vascular tissues on both sides of the ring. Reunion after ring - cutting necessitated 10-20 days after operation. Rate of transport through the reunion tissue was initially low and a longer time had elapsed before the function of transport was fully recovered. The effect of plant hormones on translocation and distribution of photosynthates was dependent on the kind of hormone and the status of plant growth and development. GA and BA, when applied to vigorously growing young leaves, significantly increased import of photosynthates into the treated leaves. On the other hand, application of ABA to leaves tended to reduce import. The above effect of GA could even spread to Applying the three above - mentioned hormones to fully matured leaves could to a certain extent alter only the partitioning of labelled photosynthates to the root system, but failed to induce import of labelled photisynthates into the treated leaves.更多还原