细胞分裂素在康乃馨花朵衰老过程中的作用。
Role of cytokinins in carnation flower senescence.
机构信息
Department of Biology, University of Santa Clara, Santa Clara, California 95053.
出版信息
Plant Physiol. 1977 Apr;59(4):707-9. doi: 10.1104/pp.59.4.707.
Abstract
Stem and leaf tissues of carnation (Dianthus caryophyllus) plants appear to contain a natural antisenescence factor since removal of most of these tissues from cut carnation flowers hastened their senescence. However, kinetin (5-10 mug/ml) significantly delayed senescence of flowers with stem and leaf tissues removed. In addition, the life span of cut flowers with intact (30-cm) stems was increased with kinetin treatment. Peak ethylene production by presenescent flowers was reduced 55% or more with kinetin treatment and was delayed by 1 day. Kinetin-treated flowers were less responsive to applied ethylene (100 mul/l for 3 hours) than untreated flowers. Possible natural roles of cytokinins in carnation flower senescence are discussed.
摘要
康乃馨（Dianthus caryophyllus）的茎和叶组织似乎含有一种天然的抗衰老因子，因为去除大多数这些组织会加速切花康乃馨的衰老。然而，激动素（5-10 微克/毫升）显著延缓了去除茎和叶组织的花朵的衰老。此外，用激动素处理可延长具有完整（30 厘米）茎的切花的寿命。用激动素处理可使衰老前花朵的乙烯产量峰值降低 55%或更多，并且延迟 1 天。与未处理的花朵相比，用激动素处理的花朵对施加的乙烯（3 小时 100 μl/l）的反应性较低。讨论了细胞分裂素在康乃馨花衰老中的可能自然作用。
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