Involvement of ABA in postharvest life of miniature potted roses
Involvement of ABA in postharvest life of miniature potted roses
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DOI：
10.1023/a:1006237311350
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发表时间：
1999-11-01
影响因子：
4.2
通讯作者：
Serek, M
中科院分区：
文献类型：
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作者：
Müller, R;Stummann, BM;Serek, M
外源施用ABA（脱落酸）导致两个品种完整的小型盆栽玫瑰（Rosa hybrida L.）采后品质恶化。喷施ABA增加了‘香草’和‘青铜’的叶落，加速了花的衰老，而只有‘青铜’的芽落。ABA对离体玫瑰花的促衰老作用明显加快，表明ABA对叶片衰老和脱落的促进作用不是ABA引起的次生反应。aba处理增加了“青铜”花的乙烯产量，而在“香草”花或两个品种的叶子中没有测量乙烯产量。1-MCP（1-甲基环丙烯）延迟ABA预处理促进了“青铜”花的衰老，这表明ABA的作用至少部分是由乙烯介导的。ABA对“香草”花的叶落和花寿命的促进作用不被1-MCP预处理所抵消。“香草”在花的各个阶段都有较低的ABA含量，而“青铜”花瓣的ABA含量在花蕾中较高，在开放的花中较低，并在花的衰老过程中增加。乙烯处理后‘香草’植株ABA含量的增加表明，乙烯，无论是天然的还是外源的，都能增加花的ABA水平。
Exogenous application of ABA (abscisic acid) to intact miniature potted rose plants (Rosa hybrida L.) resulted in deterioration of postharvest quality of two cultivars. Spraying with ABA increased leaf drop and accelerated flower senescence in 'Vanilla' and 'Bronze', while bud drop was only induced in 'Bronze'. Application of ABA to detached rose flowers accelerated their senescence, indicating that the observed senescence promoting effect was not a secondary response resulting from ABA-induced leaf senescence and abscission. ABA-treatment increased ethylene production in 'Bronze' flowers, while no ethylene production was measured in flowers of 'Vanilla', or in the leaves of both cultivars. Pre-treatment with 1-MCP (1-methylcyclopropene) delayed ABA promoted flower senescence in 'Bronze', suggesting that the effect of ABA is at least partly mediated by ethylene. The senescence promoting effect of ABA on leaf drop and flower life of 'Vanilla' flowers was not counteracted by 1-MCP pre-treatment. The cultivar 'Vanilla' had a low ABA level at all flower stages, while ABA content of the 'Bronze' petals was high in buds, lower in open flowers, and increased during flower senescence. An increased ABA content after ethylene treatment in 'Vanilla' suggests that ethylene, natural or exogenous, can increase ABA levels of flowers.