The legacy effects of rubber defoliation period on the refoliation phenology,leaf disease,and latex yield  

作　　者：De-Li Zhai Jian-Chu Xu 

机构地区：[1]Center for Mountain Futures,Kunming Institute of Botany,Kunming 650201,Yunnan,China [2]Institute of Environment and Ecology,School of the Environment and Safety Engineering,Jiangsu University,301 Xuefu Road,Zhenjiang,212013,Jiangsu Province,China [3]Key Laboratory for Economic Plants and Biotechnology,Kunming Institute of Botany,Chinese Academy of Sciences,132 Lanhei Road,Kunming 650201,Yunnan,China [4]East and Central Asia Regional Office,World Agroforestry(ICRAF),Kunming 650201,Yunnan,China

出　　处：《Plant Diversity》2023年第1期98-103,共6页植物多样性（英文版）

基　　金：financially supported by the Key Research Program of Frontier Sciences,the Chinese Academy of Sciences (No.QYZDY-SSW-SMC014);the National Natural Science Foundation of China (No.32171576)。

摘　　要：The leaf phenology of trees has received particular attention for its crucial role in the global water and carbon balances,ecosystem,and species distribution.However,current studies on leaf phenology have mainly focused on temperate trees,while few studies including tropical trees.Little attention has been paid to globally extensive industrial plantations.Rubber plantations are important to both the local and global economies.In this study,we investigated the legacy effects of defoliation phenology on the following year’s leaf flushing,leaf disease,and also latex yield of rubber trees,an economically important tree to local people and the world.Results show that extended duration of defoliation increased the subsequent duration of refoliation and rates of infection by powdery mildew disease,but led to reduced latex yield in March.This legacy effect of rubber defoliation may relate to the carbohydrate reserved in the trees.A longer duration of defoliation would consume more reserved carbohydrates,reducing available reserves for disease defense and latex production.Extended duration of defoliation period was associated with either a lower temperature before the cessation of latex tapping in October-November and/or a higher temperature after the cessation of latex tapping in December-January.Leaf falling signals the end of photosynthetic activities in deciduous trees.Thus,the leaf falling phenology will impact ecological processes involving rubber trees.Our findings indicated that the inclusion of defoliation periods in future rubber trees’ research,will be crucial to furthering our understanding of leaf flushing,powdery mildew disease,and latex yield.

关 键 词：CARBOHYDRATE DEFOLIATION Legacy effect PHENOLOGY Rubber trees 

分 类 号：Q948[生物学—植物学]