广西植物2025，Vol.45Issue(9)：1553-1562,10.DOI:10.11931/guihaia.gxzw202404007
秋茄新生小枝生长性状季节动态规律研究
Seasonal dynamics in growth traits of newly emerged twigs of Kandelia obovata
摘要
Abstract
Newly emerged twigs are the most active part of plant branch systems and are most sensitive to changes in habitat such as light and temperature.Analyzing the differences in stem and leaf traits of new twigs and evaluating their growth status is crucial for understanding the growth and survival strategies of plants and their adaptability mechanisms.As an evergreen broad-leaved small tree,the crown of Kandelia obovata produces a certain number of new twigs in different seasons within a year.To gain a deeper understanding of the growth status and seasonal dynamics of new twigs of K.obovata,this study investigated the growth traits of the stems and leaves of new twigs.Statistical methods such as analysis of variance,multiple comparisons,and principal component analysis(PCA)were used to comprehensively evaluate the growth performance of the twigs in different seasons and to explore the growth and survival strategies of mangrove plants,represented by K.obovata.The results were as follows:(1)The 14 trait indicators characterizing the growth status of the twigs showed significant variation,with a coefficient of variation ranging from 13.856%to 56.469%,and a strong correlation between the indicators.(2)The growth traits of the twigs varied significantly in different seasons(P<0.05),with the overall performance being July>May>March>October.Additionally,the importance of the growth traits was ranked as leaf traits>biomass>stem configuration.(3)The importance of growth traits was ranked as leaf traits(55.050%)>biomass(35.480%)>stem configuration(9.470%).The total weight proportion of the seven trait indicators such as leaf density,leaf and stem biomass ratio,leaf number,leaf biomass,big leaf area,stem length,and leaf area ratio was 87.146%,which were the key indicators characterizing the growth status of the twigs of K.obovata.In conclusion,the growth status of the twigs reflects the adaptation strategy of the tree to resource levels,influenced by external factors such as light and temperature,as well as internal factors such as growth strategies.These research results provide insight into the response of the twigs to environmental changes in different seasons and offer a reference basis for the protection and sustainable development of K.obovata population.关键词
生长性状/主成分分析/生长策略/红树植物/植物生态Key words
growth traits/principal component analysis(PCA)/growth strategies/mangrove plants/plant ecology分类
农业科技引用本文复制引用
许丙岩,李键,洪滔..秋茄新生小枝生长性状季节动态规律研究[J].广西植物,2025,45(9):1553-1562,10.基金项目
国家自然科学基金(31400533) （31400533）
福州市生态城市建设及社会发展综合项目(榕科[2022]253号). （榕科[2022]253号）
