生物
拟南芥
韧皮部
木质部
生长素
调节器
抑制因子
细胞生物学
主调节器
基因
细胞分裂素
转录因子
植物
负调节器
野生型
转录调控
遗传学
突变体
作者
Haoran Qi,Heng Cai,Xin Liu,Sian Liu,Changjun Ding,Meng Xu
出处
期刊:Plant Science
[Elsevier]
日期:2022-12-01
卷期号:325: 111456-111456
被引量:4
标识
DOI:10.1016/j.plantsci.2022.111456
摘要
Adventitious root (AR) development is an ecologically and economically important biological process that maintains ecological balance, improves plant survivability, and allows for massive vegetative propagation, but its genetic mechanisms are not well understood. Here, eight Arabidopsis response regulator (ARR) genes were cloned and identified in poplar, most of which were detected in the AR, phloem, and xylem and showed remarkable induction at different time points during AR development. Subcellular localization indicated that most of these PeRR genes are in the nucleus. Based on qRT-PCR expression analysis of some genes related to AR development, we inferred that overexpression of PeRR12 (OE_PeRR12) may inhibited AR formation by suppressing the transcription of PeWOX11, PeWOX5, PePIN1 and PePIN3 in poplar while promoting type-A RR transcripts. Correspondingly, exogenous auxin partially restored the rooting of OE_PeRR12 poplar by inhibiting PeRR12 expression. Moreover, the activities of the antioxidant systems of OE_PeRR12 poplars were lower than those of wild-type poplars under salt stress conditions, indicating that PeRR12 may acts as a repressor that mediates salt tolerance by suppressing the expression of PeHKT1;1. Altogether, these results suggest that PeRR12 plays essential roles in mediating AR formation and salinity tolerance in poplar.
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