Comparative study on seasonal changes in physiological characteristics of three species of Podocarpus
Journal Title: 广东农业科学 - Year 2018, Vol 45, Issue 6
Abstract
"The seasonal changes in physiological and biochemical of Podocarpus. princess，P. annamiensis and P. macrophyllus were studied in Nanning of Guangxi. The results showed that the physiological and biochemical normal changed with seasons changes in three species of Podocarpus. Among the permeability regulating substance change， the content of soluble sugar was the lowest in summer and the highest in winter，the average value is P. princess>P. annamiensis>P. macrophyllus ；soluble protein content is autumn> spring> summer> winter，the average value is P. annamiensis>P. macrophyllus >P. annamiensis ；seasonal variation of proline content in P. princess is winter> spring >autumn>summer and the changes between seasons were relatively gentle. Both P. annamiensis and P. macrophyllus were autumn>spring>winter>summer and there were significant differences between seasons. In the enzyme protection system，the dynamic changes of SOD activity in the four seasons of three types of Podocarpus were basically the same as that of the first hight and then the downward trend，which was autumn> winter> spring> summer；the POD activity in the four seasons was spring> summer> winter> autumn. Among them，the POD activity of P. annamiensis was highest in spring；the seasonal variation of CAT activity was winter> summer> spring> autumn；the activities of SOD，POD，and CAT were P. annamiensis >P. macrophyllus >P. princess. In the seasonal change of photosynthetic pigment content，the content of chlorophyll a was the lowest in summer and the seasonal variation was summer> autumn> spring> winter；the changing rules of chlorophyll b and carotenoid content were basically the same in summer> spring> autumn> winter，P. annamiensis> P. macrophyllus>P. princess. In summary，changes in the seasons have different degrees of influence on the physiological and biochemical indexes of three types of Podocarpus. Among them，the physiological and biochemical indexes of P. annamiensis are stronger than those of the other two species Podocarpus，which shows that in the natural environment P. annamiensis growth is even more dominant."
Authors and Affiliations
Xiang-ling HUANG, Li-jun ZHAO
Keywords
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- EP ID EP600956
- DOI 10.16768/j.issn.1004-874X.2018.06.008
- Views 81
- Downloads 0
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