ISHS Acta Horticulturae 774: XXVII International Horticultural Congress - IHC2006: International Symposium on Endogenous and Exogenous Plant Bioregulators
DYNAMICS OF ENDOGENOUS POLYAMINES IN SEEDLING TREES OF PYRUS USSURIENSIS MAXIM. × P. BRETSCHNEIDERI REHD. |
| Authors: | Chun Min Li, Xin Zhong Zhang, Wen Quan Yue, Yong Bo Zhao, Wen Fang Zu, Guang Peng Wang, Rui Feng Chang, Huai Rui Shu |
| Keywords: | phase change, polyamines, Pyrus |
| Abstract:
The endogenous polyamine contents were analyzed both qualitatively and quantitatively in leaves and phloem of pear seedling trees ('Jingbai' × 'Ya Pear') by high performance liquid chromatography. The putrescine concentration peaked at the node nos. 86-90. And the ratio of putrescine/spermidine+spermine was exceeded 1 in samples taken from the nodes higher than the node nos. 86-90. The results implicated that the node nos. 81-85 would be an important physiological transition point of interspecific hybrid seedling trees in Pyrus. | |
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