文献类型：期刊文献

英文题名：Root Response of Moso Bamboo (Phyllostachys edulis (Carriere) J. Houz.) Seedlings to Drought with Different Intensities and Durations

作者：Yang, Zhenya[1,2,3] Cao, Yonghui[1,3] Zhao, Jiancheng[2] Zhou, Benzhi[1,3] Ge, Xiaogai[1,3] Li, Qin[2] Li, Maihe[4,5]

第一作者：Yang, Zhenya

通信作者：Zhou, BZ[1];Zhou, BZ[2]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Peoples R China;[2]Zhejiang Acad Forestry, Zhejiang Prov Key Lab Bamboo Res, Hangzhou 310023, Peoples R China;[3]Natl Forestry & Grassland Adm, Qianjiangyuan Forest Ecosyst Res Stn, Hangzhou 311400, Peoples R China;[4]Swiss Fed Res Inst WSL, Forest Dynam, CH-8903 Birmensdorf, Switzerland;[5]Northeast Normal Univ, Sch Geog Sci, Key Lab Geog Proc & Ecol Secur Changbai Mt, Minist Educ, Changchun 130024, Peoples R China

年份：2021

卷号：12

期号：1

外文期刊名：FORESTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000610209900001)】；

基金：This study was supported by funding from the National Natural Science Foundation of China (NSFC)(Nos. 31670607, 30840064), National Key R&D Program of China (No. 2016YFD06002024) and the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (Nos. CAFYBB2017ZX002-2, CAFYBB2018GB001).

语种：英文

外文关键词：drought; adaptation strategy; root architecture; non-structural carbohydrates

摘要：The root of Moso bamboo (Phyllostachys edulis (Carriere) J. Houz.) develops extremely rapidly at seedling phase and is highly sensitive to water content in soil, but its response patterns and adaptation strategies of its root to drought are little known. The aim of this study was to investigate the response of root morphology and architecture of Moso bamboo to drought at seedling phase and then to explore the drought adaptation strategies of its root. One-year-old potted seedlings of Moso bamboo were planted under three drought treatments (control, moderate drought and severe drought) for three months. Seedling growth, specific root length (SRL), root architecture (fractal dimension (FD), root branching angle (RBA) and root topological index (TI)) and non-structural carbohydrate (NSC) concentrations in roots were measured every month. The results are as follows: (i) The dry weight of root and shoot decreased significantly under drought stress. (ii) The SRL decreased under drought stress in the early duration (the first month), and then increased in the late duration (the third month). Both FD and RBA decreased, while TI and the concentrations of NSCs increased under drought stress. (iii) The NSC concentrations were positively correlated with SRL and TI, but exhibited an inverse relationship to FD and RBA. Our results indicated that Moso bamboo seedlings formed a "steeper, simpler, expensive (low SRL and high TI)" root architecture to adapt to a short-term drought (one month), and formed a "cheaper (high SRL)" root to adapt to a long-term drought (three months). Increase of NSC concentrations supported the root architecture plasticity to some extent.