文献类型：期刊文献

英文题名：Root response of moso bamboo (Phyllostachys edulis (carrière) 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, Benzhi

机构：[1] Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, 311400, China; [2] Zhejiang Provincial Key Laboratory of Bamboo Research, Zhejiang Academy of Forestry, Hangzhou, 310023, China; [3] Qianjiangyuan Forest Ecosystem Research Station, National Forestry and Grassland Administration, Hangzhou, 311400, China; [4] Forest Dynamics, Swiss Federal Research Institute WSL, Birmensdorf, CH-8903, Switzerland; [5] Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, 130024, China

年份：2021

卷号：12

期号：1

起止页码：1-17

外文期刊名：Forests

收录：EI(收录号：20210209767083);Scopus(收录号：2-s2.0-85099132982)

基金：Funding: 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. 2016YFD0600202-4) 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：Bamboo - Finite difference method - Fractal dimension - Seed

摘要：The root of Moso bamboo (Phyllostachys edulis (Carrière) 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. ? 2020 by the authors. Licensee MDPI, Basel, Switzerland.