文献类型：期刊文献

英文题名：Spatial variations and pools of non-structural carbohydrates in young Catalpa bungei undergoing different fertilization regimes

作者：Guan, Zhuizhui[1] Lu, Qifeng[1] Lin, Yubiao[1] Lin, Daiyi[1] Lu, Yizeng[2] Han, Qingjun[2] Li, Ningning[2] Ma, Wenjun[3] Wang, Junhui[3] Su, Yan[1] Li, Jiyue[1] Qiu, Quan[1] He, Qian[1]

第一作者：Guan, Zhuizhui

通信作者：Qiu, Q[1];He, Q[1]

机构：[1]South China Agr Univ, Coll Forestry & Landscape Architecture, Guangdong Key Lab Innovat Dev & Utilizat Forest Pl, Guangzhou, Peoples R China;[2]Shandong Prov Ctr Forest & Grass Germplasm Resourc, Jinan, Peoples R China;[3]Chinese Acad Forestry, Inst Resource Cultivat, Res Inst Forestry, Beijing, Peoples R China

年份：2022

卷号：13

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000868067900001)】；

基金：Funding This research was supported by the grants from National Key Research and Development Program of China (2017YFD0600604, 2017YFD060060404).

语种：英文

外文关键词：spatial variation; non-structure carbohydrate (NSC); sugar and starch pool; carbon allocation; integration of water and fertilizer

摘要：Despite the importance of non-structural carbohydrates (NSC) for growth and survival in woody plants, we know little about whole-tree NSC storage. Here, Catalpa bungei trees fertilized using different schedules, including water and fertilizer integration, hole application, and no fertilization, were used to measure the spatial variations of sugar, starch, and NSC concentrations in the leaf, branch, stem, bark, and root. By calculating the volume of whole-tree NSC pools and the contribution of distinct organs, we were also able to compare the storage under various fertilization regimes. We found that the spatial distribution patterns of each organ undergoing different fertilization regimes were remarkably similar. Height-related increases in the sugar and NSC concentrations of the leaf and bark were observed. The concentrations of sugar and NSC in the branch did not appear to vary longitudinally or horizontally. The sugar and NSC concentrations in the stem fluctuated with height, first falling and then rising. The coarse root contained larger amounts of NSC components in comparison to fine root. Contrary to no fertilization, fertilization enhanced the distribution ratio of the leaf, branch, and stem NSC pools while decreasing the distribution ratio of the root NSC pool. Particularly, the addition of fertilizer and water significantly increased the biomass of the organs, enhancing the carbon sink of each organ and whole-tree in comparison to other fertilization regimes. Our main goal was to strengthen the empirical groundwork for comprehending the functional significance of NSC allocation and stock variations at the organ-level of C. bungei trees.