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

Abstract:

: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 PvPIN1gene 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 toPvPIN1 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 inducedPvPIN1 gene overexpression or suppression altered tiller number and the shoot/root ratio. These data suggest that PvPIN1plays an important role in auxin-dependent adventitious root emergence and tillering.

journal_name

Genet Mol Biol

authors

Xu K,Sun F,Wang Y,Shi L,Liu S,Xi Y

doi

10.1590/1678-4685-GMB-2014-0300

subject

Has Abstract

pub_date

2016-03-01 00:00:00

pages

62-72

issue

1

eissn

1415-4757

issn

1678-4685

pii

S1415-47572016000100062

journal_volume

39

pub_type

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