The Department of Plant Physiology The Negev Institute for Arid Zone Kesearch, Beer-Sheva, Israel.
Physiol Plant. 1969;22(6):1207-16. doi: 10.1111/j.1399-3054.1969.tb09111.x.
The relation hetween the effects of kinetin and gibberellin on retardation of leaf senescence was studied. Leaf discs were incubated for five days in several hormone concentrations, the chlorophyll was extracted and its amount estimated spectrophotometrically. Investigation of leaves from actively growing plants of Taraxacum megalorrhizon and Tropaeolum majus showed that an interaction existed between the effect of both hormones. Leaf age, light intensity and day length had a marked effect on the degree of response to the hormonal treatments, hut the change in response effected by these conditions remained similar for both hormones. Possible interpretations of the interaction observed between the effects of kinetin and gibberellin are discussed.
研究了激动素和赤霉素对延缓叶片衰老的影响。将叶片圆盘在几种激素浓度下培养五天，然后提取叶绿素并通过分光光度法估计其含量。对 actively growing 的蒲公英和金莲花叶片的研究表明，这两种激素的作用存在相互作用。叶片年龄、光照强度和日照长度对激素处理的反应程度有显著影响，但这些条件引起的反应变化对两种激素来说仍然相似。讨论了观察到的激动素和赤霉素作用之间相互作用的可能解释。
