The PIN1 family gene PvPIN1 is involved in auxin-dependent root emergence and tillering in switchgrass

文献类型： 外文期刊

第一作者： Kaijie Xu

作者： Kaijie Xu;Fengli Sun;Yongfeng Wang;Lili Shi;Shudong Liu;Yajun Xi

作者机构：

关键词： Auxin transporter;PvPIN1 gene;TIBA treatment;tillering;switchgrass

期刊名称：GENETICS AND MOLECULAR BIOLOGY （ 影响因子：1.771； 五年影响因子：2.584 ）

ISSN： 1415-4757

年卷期： 2016 年 39 卷 1 期

页码：

收录情况： SCI

摘要： Switchgrass (Panicum virgatum L.; family Poaceae) is a warm-season C4 perennial grass. Tillering plays an important role in determining the morphology of aboveground parts and the final biomass yield of switchgrass. Auxin distribution in plants can affect a variety of important growth and developmental processes, including the regulation of shoot and root branching, plant resistance and biological yield. Auxin transport and gradients in plants are mediated by influx and efflux carriers. PvPIN1, a switchgrass PIN1-like gene that is involved in regulating polar transport, is a putative auxin efflux carrier. Neighbor-joining analysis using sequences deposited in NCBI databases showed that the PvPIN1 gene belongs to the PIN1 family and is evolutionarily closer to the Oryza sativa japonica group. Tiller emergence and development was significantly promoted in plants subjected to PvPIN1 RNA interference (RNAi), which yielded a phenotype similar to that of wild-type plants treated with the auxin transport inhibitor TIBA (2,3,5-triiodobenzoic acid). A transgenic approach that induced PvPIN1 gene overexpression or suppression altered tiller number and the shoot/root ratio. These data suggest that PvPIN1 plays an important role in auxin-dependent adventitious root emergence and tillering.

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