权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Studies on translocation of assimilates into fruits, and it's metabolism in horticultural plants.

同化物向果实的转运及其在园艺植物中的代谢研究。

基本信息

批准号：
02660021
负责人：
MOTOMURA Yoshie
金额：
$ 1.09万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02660021/
关键词：
Grape Melon European pear Translocation of assimilates Translocation route of assimilates Metabolism of translocation subtances

项目摘要

a. ^<14>C-Assimilates partitioning and its metabolism in melon and cucumber plants.Effect of leaf position on the main stem on the distribution of ^<14>C-assimilates into melon fruits on the lateral shoot was little detected. ^<14>C-assimilates produced in the ^<14>CO_2-fed-leaf translocated to petiol, stem just below the ^<14>CO_2-fed-leaf, leteral shoot with fruit, peduncle and fruit. In these tissues, distributions of ^<14>C in fructose, glucose, sucrose and oligosaccharides fractions were investigated. Percentage distribution of ^<14>C in oligosaccharides fraction decreased gradually, in the tissues along the translocation route, in melon and cucumber plants, but the percentage values were always higher in melon plant compared with cucumber plant. Percentage distributions of ^<14>C in sucrose and monosaccharides fraction increased in the tissues along the translocation route, in both of melon and cucumber plants. These results suggest that the translocation substances could be meta … More bolized in the tissues along the translocation route, and the degradation activity in melon differed to cucumber.b. Metabolism of assimilates in grapevine.Translocation substance in grape-vine was reported as sucrose, but in the shoots 2-3 weeks after. full bloom, the sugars translocated fbom ^<14>C0_2-fed-leaf to the bark of stem was mainly monosaccharides in 'Delaware' while mainly sucrose in 'Concord'. In the peduncle and fruits in both cultivars, no or little ^<14>C-sucrose was detected. These results suggests that the degradation activity of translocation substances in the tissues along the translocation route are varying with cultivars.c. Estimation of maturity of 'La France' pear fruit by I_2-starch reaction.Fruits of European pear 'La France' are harvested about 165 days after full bloom, in Yamagata Prefecture in Japan, but the fruits quality after ripening are not similar by years. For the estimation of the maturity of the fruits, color of the I_2-strach reaction 15 min after painting of the reagent is the most practical methods. Based on the investigation of the starch content in the growing and maturing fruits for five years from 1986-1991, it was considered that the quantity of accumulated starch in flesh of fruits until the end of August and the decreasing speed of the starch from middle September to the beginning of October have to be measured to estimate the fruit maturity. Development of the practical method to estimate the degradation speed of starch by I2-starch reaction was tried. Less

甜瓜和黄瓜植株中~(14)&gt；C-同化物的分配和代谢，主茎叶位对侧枝上的~(14)&gt；C-同化物在甜瓜果实中的分配影响不大。14&gt；14&gt；C-同化物产生于叶柄，茎正下方，14&gt；14&gt；14&gt；C-同化物，叶枝具果实，花序梗和果实。在这些组织中，研究了果糖、葡萄糖、蔗糖和低聚糖组分中^&lt；14和gt；C的分布。在甜瓜和黄瓜植株中，低聚糖组分中~-lt；14&gt；C在转运途径沿途组织中的百分比分布逐渐降低，但甜瓜植株的百分比值始终高于黄瓜植株。在甜瓜和黄瓜植株中，沿转运途径，蔗糖和单糖中~(14)&gt；C的百分比分布均增加。这些结果表明，转位物质可能是Meta…。在转位途径沿途的组织中，甜瓜的降解活性与黄瓜不同。葡萄体内同化物的代谢：据报道，葡萄体内的转运物为蔗糖，但在2-3周后，葡萄枝条中的转运物为蔗糖。盛花期，‘特拉华’以单糖为主，‘协和’以蔗糖为主，14&gt；在两个品种的花序梗和果实中均未检测到或检测到少量的~(14)C-蔗糖。这些结果表明沿转运途径的组织中转运物质的降解活性随品种的不同而不同。用I2-淀粉反应评价‘La France’梨果实的成熟度日本山形县的‘La France’梨在盛花后165天左右采收，但成熟后的果实品质各不相同。对于果实成熟度的判断，试剂涂抹15min后I_2-Strach反应的颜色是最实用的方法。根据1986~1991年连续5年对果实生长和成熟过程中淀粉含量的调查，认为果实成熟度应以8月底前果实中淀粉的积累量和9月中旬至10月上旬的淀粉下降速度为指标。探索了用I2-淀粉反应估算淀粉降解速度的实用方法。较少