文献类型：期刊文献

英文题名：Superoxide anions induce tension wood formation by promoting cambium cell activity

作者：Huang, Li-Chao[1,2] Li, Yu-Yu[1] Lai, Jian-Xin[1] An, Yi[1] Song, Xue-Qin[3] Zhao, Shu-Tang[3] Zhang, Jin[1] Lu, Meng-Zhu[1]

第一作者：Huang, Li-Chao

通信作者：Lu, MZ[1]

机构：[1]Zhejiang A&F Univ, Coll Forestry & Biotechnol, State Key Lab Subtrop Silviculture, Hangzhou 311300, Peoples R China;[2]Zhejiang A&F Univ, Zhejiang Prov Key Lab Forest Aromat Plants Based H, Hangzhou 311300, Peoples R China;[3]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Beijing 100094, Peoples R China

年份：2025

卷号：197

期号：1

外文期刊名：PLANT PHYSIOLOGY

收录：;Scopus(收录号：2-s2.0-85215145704);WOS:【SCI-EXPANDED(收录号:WOS:001390059500001)】；

基金：This work was supported by the National Key Research and Development Program of China "International Cooperation in Science and Technology Innovation between Governments" (grant no. 2019YFE0119100), the National Natural Science Foundation of China (grant no. 32201582), the Zhejiang Provincial Natural Science Foundation of China (LQ22C160008), and the Research Foundation of Zhejiang A&F University (2018FR013).

语种：英文

摘要：Tension wood (TW), characterized by increased cambium cell proliferation and few vessels, is a classical model for the mechanical analysis of wood formation. In this study, we found higher superoxide anion (O2.-) levels in the cambium zone of poplar (Populus alba x P. glandulosa clone "84K") TW than in that of opposite wood during gravistimulation. Treatment with an O2.- activator (methyl viologen) resulted in tension-wood-like xylem tissue formation, and transgenic plants with reduced cambium O2.- levels presented an attenuated gravity response. Time-course detection of O2.- and indole-3-acetic acid (IAA) levels revealed that auxin responses were enhanced following increases in O2.- levels, suggesting that IAA mediates TW induction downstream of O2.-. Rapid division but advanced programmed cell death in cambium cells was detected in both gravistimulated and O2.- activator-treated plants. These findings suggest that high O2.- levels trigger downstream IAA signaling to promote cambium cell proliferation and induce TW formation. Superoxide anions trigger auxin signaling and promote cambium cell proliferation in poplar, thereby inducing tension wood formation.