...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Experimental Botany >Inhibition of the ethylene response by 1-MCP in tomato suggests that polyamines are not involved in delaying ripening, but may moderate the rate of ripening or over-ripening
【24h】

Inhibition of the ethylene response by 1-MCP in tomato suggests that polyamines are not involved in delaying ripening, but may moderate the rate of ripening or over-ripening

机译：番茄中1-MCP对乙烯反应的抑制作用表明多胺不参与延迟成熟，但可以减缓成熟或过度成熟的速度

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ethylene initiates the ripening and senescence of climacteric fruit, whereas polyamines have been considered as senescence inhibitors. Ethylene and polyamine biosynthetic pathways share S-adenosylmethionine as a common intermediate. The effects of 1-methylcyclopropene (1-MCP), an inhibitor of ethylene perception, on ethylene and polyamine metabolism and associated gene expression was investigated during ripening of the model climacteric fruit, tomato (Solanum lycopersicum L.), to determine whether its effect could be via polyamines as well as through a direct effect on ethylene. 1-MCP delayed ripening for 8 d compared with control fruit, similarly delaying ethylene production and the expression of 1-aminocyclopropane-1-carboxylic acid (ACC)-synthase and some ethylene receptor genes, but not that of ACC oxidase. The expression of ethylene receptor genes returned as ripening was reinitiated. Free putrescine contents remained low while ripening was inhibited by 1-MCP, but increased when the fruit started to ripen; bound putrescine contents were lower. The activity of the putrescine biosynthetic enzyme, arginine decarboxylase, was higher in 1-MCP-treated fruit. Activity of S-adenosylmethionine-decarboxylase peaked at the same time as putrescine levels in control and treated fruit. Gene expression for arginine decarboxylase peaked early in non-treated fruit and coincident with the delayed peak in putrescine in treated fruit. A coincident peak in the gene expression for arginase, S-adenosylmethionine-decarboxylase, and spermidine and spermine synthases was also seen in treated fruit. No effect of treatment on ornithine decarboxylase activity was detected. Polyamines are thus not directly associated with a delay in tomato fruit ripening, but may prolong the fully-ripe stage before the fruit tissues undergo senescence.
机译：乙烯引发更年期果实的成熟和衰老，而多胺被认为是衰老抑制剂。乙烯和多胺的生物合成途径共有S-腺苷甲硫氨酸作为常见中间体。在模型的更年期水果，番茄（Solanum lycopersicum L.）成熟期间，研究了乙烯感知抑制剂1-甲基环丙烯（1-MCP）对乙烯和多胺代谢及相关基因表达的影响，以确定其效果如何。可以通过多胺以及对乙烯的直接作用。与对照果实相比，1-MCP延迟了成熟8天，同样地延迟了乙烯的产生以及1-氨基环丙烷-1-甲酸（ACC）合酶和一些乙烯受体基因的表达，但没有延迟ACC氧化酶的表达。重新开始成熟时返回的乙烯受体基因的表达。 1-MCP抑制了成熟过程中游离腐胺的含量，但是当果实开始成熟时，游离腐胺的含量却增加了。结合的腐胺含量较低。在1-MCP处理的水果中，腐胺生物合成酶（精氨酸脱羧酶）的活性较高。在对照和处理的水果中，S-腺苷甲硫氨酸-脱羧酶的活性与腐胺水平同时达到峰值。精氨酸脱羧酶的基因表达在未处理的果实中早期达到峰值，并且与在处理的果实中的腐胺中的延迟峰值一致。在处理过的水果中，精氨酸酶，S-腺苷甲硫氨酸脱羧酶，亚精胺和精胺合酶的基因表达也出现了一个一致的峰。没有检测到处理对鸟氨酸脱羧酶活性的影响。因此，多胺与番茄果实成熟的延迟不直接相关，但可以延长果实组织衰老之前的完全成熟阶段。

著录项

  • 来源
    《Journal of Experimental Botany》 |2006年第12期|3313-3325|共13页
  • 作者

    Annalisa Tassoni; Christopher B. Watkins; and Peter J. Davies;

  • 作者单位

    Department of Plant Biology Cornell University Ithaca NY 14853 USA;

    Department of Horticulture Cornell University Ithaca NY 14853 USA;

    Department of Experimental Evolutionary Biology University of Bologna Via Irnerio 42 I-40126 Bologna Italy;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号