文献类型：期刊文献

英文题名：Competing Endogenous RNA Networks Underlying Anatomical and Physiological Characteristics of Poplar Wood in Acclimation to Low Nitrogen Availability

作者：Lu, Yan[1] Deng, Shurong[1] Li, Zhuorong[1] Wu, Jiangting[1] Liu, Qifeng[1] Liu, Wenzhe[1] Yu, Wen-Jian[1] Zhang, Yuhong[1] Shi, Wenguang[1] Zhou, Jing[1] Li, Hong[2] Polle, Andrea[3] Luo, Zhi-Bin[1]

通信作者：Luo, ZB[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Silviculture Natl Forestry & Grassland Ad, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Postgrad Sch, Beijing 100091, Peoples R China;[3]Univ Goettingen, Forest Bot & Tree Physiol, Busgenweg 2, D-37077 Gottingen, Germany

年份：2019

卷号：60

期号：11

起止页码：2478-2495

外文期刊名：PLANT AND CELL PHYSIOLOGY

收录：;Scopus(收录号：2-s2.0-85074674775);WOS:【SCI-EXPANDED(收录号:WOS:000501735800011)】；

基金：The National Key Research and Development Program [2016YFD0600105] and the National Natural Science Foundation of China [31670609].

语种：英文

外文关键词：Amino acids; Carbohydrates; Metabolomics; Phytohormones; Populus; Secondary xylem

摘要：Although poplar plantations are often established on nitrogen (N)-poor soil, the physiological and molecular mechanisms underlying wood properties of poplars in acclimation to low N availability remain largely unknown. To investigate wood properties of poplars in acclimation to low N, Populus canescens saplings were exposed to either 50 (low N) or 500 (normal N) M NH4NO3 for 2 months. Low N resulted in decreased xylem width and cell layers of the xylem (the number of cells counted along the ray parenchyma on the stem cross section), narrower lumina of vessels and fibers, greater thickness of double fiber walls (the walls between two adjacent fiber cells), more hemicellulose and lignin deposition, and reduced cellulose accumulation in poplar wood. Consistently, concentrations of gibberellins involved in cell size determination and the abundance of various metabolites including amino acids, carbohydrates and precursors for cell wall biosynthesis were decreased in low N-supplied wood. In line with these anatomical and physiological changes, a number of mRNAs, long noncoding RNAs (lncRNAs) and microRNAs (miRNAs) were significantly differentially expressed. Competing endogenous RNA regulatory networks were identified in the wood of low N-treated poplars. Overall, these results indicate that miRNAs-lncRNAs-mRNAs networks are involved in regulating wood properties and physiological processes of poplars in acclimation to low N availability.