文献类型：期刊文献

英文题名：Secondary Stem Growth in Tobacco (Nicotiana Tabacum) is Strongly Impacted by Plant Spacing

作者：Xu, Na[1] Xu, Yanli[1] Tang, Fang[2] Du, Shasha[1] Song, Wenjing[1]

第一作者：Xu, Na

机构：[1] Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture, Tobacco Research Institute, Chinese Academy of Agricultural Sciences [CAAS], Qingdao, 266101, China; [2] State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220373887)

语种：英文

外文关键词：Cellulose - Genes

摘要：Plant spacing in tobacco ( Nicotiana tabacum ) production refers to the distance between plants within and between rows in the field. Variations in plant spacing often affect secondary growth of tobacco stems. NtHB8 and NtNST3 genes, which have transcriptional activation activity, were upregulated during tobacco stem secondary growth. Plants spaced 60 cm apart had significantly higher levels of lignin, cellulose, and hemicellulose; cambium activity; vascular bundle thickness; accumulation of nitrogen, phosphorus, and potassium in the shoot; and expression levels of NtHB8sy , NtHB8to, and NtNST3sy compared to plants spaced 30 cm apart. The promoters of NtHB8 and NtNST3 genes were found to be rich in light-response elements, suggesting that light may be the main environmental factor involved in regulating secondary stem growth that is impacted by plant spacing. Our results highlight the utility of tobacco as a model plant for the study of secondary growth and wood formation. ? 2022, The Authors. All rights reserved.