文献类型：期刊文献

英文题名：Why can Mikania micrantha cover trees quickly during invasion?

作者：Chen, Lihua[1] Cai, Minling[2] Zhang, Qilei[3] Pan, Yanru[1] Chen, Manting[1] Zhang, Xiaowen[1] Wu, Jirong[1] Luo, Haoshen[4] Peng, Changlian[1]

第一作者：Chen, Lihua

通信作者：Peng, CL[1]

机构：[1]South China Normal Univ, Guangzhou Key Lab Subtrop Biodivers & Biomonitorin, Guangdong Prov Key Lab Biotechnol Plant Dev, Sch Life Sci, Guangzhou 510631, Peoples R China;[2]Huizhou Univ, Sch Life Sci, Huizhou 516007, Peoples R China;[3]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Peoples R China;[4]South China Agr Univ, Coll Life Sci, Guangzhou 510642, Peoples R China

年份：2024

卷号：24

期号：1

外文期刊名：BMC PLANT BIOLOGY

收录：;Scopus(收录号：2-s2.0-85195439268);WOS:【SCI-EXPANDED(收录号:WOS:001244352700001)】；

基金：This work was supported by the National Natural Science Foundation of China (32171493, 31870374).

语种：英文

外文关键词：Sugars; Plant hormone; Branches; Tree canopy; Biological invasion; Mikania micrantha

摘要：The invasion of Mikania micrantha by climbing and covering trees has rapidly caused the death of many shrubs and trees, seriously endangering forest biodiversity. In this study, M. micrantha seedlings were planted together with local tree species (Cryptocarya concinna) to simulate the process of M. micrantha climbing under the forest. We found that the upper part of the M. micrantha stem lost its support after climbing to the top of the tree, grew in a turning and creeping manner, and then grew branches rapidly to cover the tree canopy. Then, we simulated the branching process through turning treatment. We found that a large number of branches had been formed near the turning part of the M. micrantha stem (TP). Compared with the upper part of the main stem (UP), the contents of plant hormones (auxin, cytokinin, gibberellin), soluble sugars (sucrose, glucose, fructose) and trehalose-6-phosphate (T6P) were significantly accumulated at TP. Further combining the transcriptome data of different parts of the main stem under erect or turning treatment, a hypothetical regulation model to illustrate how M. micrantha can quickly cover trees was proposed based on the regulation of sugars and hormones on plant branching; that is, the lack of support after ascending the top of the tree led to turning growth of the main stem, and the enhancement of sugars and T6P levels in the TP may first drive the release of nearby dormant buds. Plant hormone accumulation may regulate the entrance of buds into sustained growth and maintain the elongation of branches together with sugars to successfully covering trees.