Biology and Agriculture Division, Bhabha Atomic Research Centre, Bombay 400 085, India.
Plant Physiol. 1977 May;59(5):961-4. doi: 10.1104/pp.59.5.961.
Effects of depetiolation on protein metabolism during senescence of detached betel (Piper betle L.) leaves have been studied. In normal petiolated leaves, the level of chlorophyll and proteins and extent of protein synthesis declined, while the protease activity registered manifold increase with the advancement of senescence. All of these changes were delayed by depetiolation/de-midribbing treatments, though without affecting the general pattern of senescence. Thus, the presence of petiole seems to expedite protein degradation, probably due to earlier attainment of optimal concentration of proposed senescence factor(s) (Mishra and Gaur 1970 Science 167: 387).
已研究去叶柄（去中脉）对离体菝葜（Piper betle L.）叶片衰老过程中蛋白质代谢的影响。在正常有叶柄的叶片中，叶绿素和蛋白质的水平以及蛋白质合成的程度下降，而蛋白酶活性随着衰老的发展呈倍数增加。尽管这些变化没有影响衰老的总体模式，但去叶柄/去中脉处理延迟了所有这些变化。因此，叶柄的存在似乎加速了蛋白质的降解，可能是由于更早地达到了所提出的衰老因子（Mishra 和 Gaur 1970 Science 167:387）的最佳浓度。
