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
Related Articles
- EP ID EP600956
- DOI 10.16768/j.issn.1004-874X.2018.06.008
- Views 83
- Downloads 0
Ecological environment evaluation and index optimization analysis of Chongming Eco-island
Chongming Island has a good ecological environment and abundant natural resources, which is the reserve space of sustainable development in Shanghai. Based on the PSR model, this paper constructed Chongming island ecolog...
Analysis on cotton production in Jiangxi province and countermeasures for its development
"Through comprehensively analyzing the status and changes of Jiangxi’s cotton production in recent years, the current situation and problems of cotton production in Jiangxi can be further understood. Based on the data of...
Analysis of the impact of oil price on natural rubber price—An empirical study based on VAR model
"In recent years, the price of oil has gradually presented negative correlation with the price of natural rubber, and it is contradictory to the previous study conclusion that the price of oil and the price of natural ru...
Measurement study of agricultural product financialization based on natural rubber futures market
"With the week data from January 2011 to April 2017 on the Chinese natural rubber futures market， The paper analyzed the information spillover effects and the time-varying characteristics of natural rubber futures at ho...
Study on the influence mechanism of farmers’ social network on their willingness to online purchase agricultural materials
"Based on social network theory，this study constructed the farmer agricultural capital formation mechanism model of online shopping intention，analysesed the influence of farmers network centricity on its agricultural m...