文献类型：期刊文献

英文题名：A Bimodal Pattern and Age-Related Growth of Intra-Annual Wood Cell Development of Chinese Fir in Subtropical China

作者：Jiang, Yanyan[1,2] Zhang, Xiongqing[1,2] Chhin, Sophan[3] Zhang, Jianguo[1]

第一作者：Jiang, Yanyan

通信作者：Zhang, XQ[1];Zhang, XQ[2]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat Natl Forestry &, Beijing, Peoples R China;[2]Nanjing Forestry Univ, Collaborat Innovat Ctr Sustainable Forestry South, Nanjing, Peoples R China;[3]West Virginia Univ, Div Forestry & Nat Resources, Morgantown, WV 26506 USA

年份：2021

卷号：12

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;Scopus(收录号：2-s2.0-85121757862);WOS:【SCI-EXPANDED(收录号:WOS:000738327100001)】；

基金：We would like to thank Prof. Jianguo Huang and Dr. Wenjing Wang for helping with lab work. We also thank the Fundamental Research Funds for the Central Non-profit Research Institution of CAF in China (CAFYBB2020SZ001-1).

语种：英文

外文关键词：age; wood cell development; microcores; Chinese fir; bimodal pattern

摘要：Age plays an important role in regulating the intra-annual changes in wood cell development. Investigating the effect of age on intra-annual wood cell development would help to understand cambial phenology and xylem formation dynamics of trees and predict the growth of trees accurately. Five intermediate trees in each stand (total of 5 stands) in five age groupings of Chinese fir (Cunninghamia lanceolata Hook.) plantations in subtropical China were monitored on micro-cores collected weekly or biweekly from January to December in 2019. We modeled the dynamics of wood cell development with a mixed effects model, analyzed the age effect on intra-annual wood cell development, and explored the contribution of rate and duration of wood cell development on intra-annual wood cell development. We found a bimodal pattern of wood cell development in all age classes, and no matter the date of peak or the maximal number of cells the bimodal patterns were similar in all age classes. In addition, compared with the older trees, the younger trees had the longest duration of wood cell development because of the later end of wood cell development and a larger number of wood cells. The younger trees had the faster growth rate than the older trees, but the date of the maximal growth rate in older trees was earlier than younger trees, which led to the production of more wood cells in the younger trees. Moreover, we found that the number of cells in wood cell formation was mostly affected by the rate (92%) rather than the duration (8%) of wood cell formation.