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NbCycB2 represses Nbwo activity via a negative feedback loop in the tobacco trichome developmemt
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Abstract
The wo protein and its downstream gene,
SlCycB2
have been demonstrated to regulate the trichome development in tomato. It was shown that only gain-of-function mutant form of
wo, Wo
v
(wo woolly motif mutant allele) could induce the increase of trichome density. However, it is still unclear the relationships between wo,
Wo
v
and
SlCycB2
in trichome regulation. In this study, we demonstrated Nbwo (NbWo
v
) directly regulated the expressions
NbCycB2
by binding to the promoter of
NbCycB2
and its genomic sequences. As a feedback regulation, NbCycB2 negatively regulates the trichome formation by repressing Nbwo activity at protein level. We further found that the mutations of Nbwo woolly motif could prevent repression of NbWo
v
by NbCycB2, which results in the significant increase of active
Nbwo
proteins, trichome density and branches. Our results revealed a novel reciprocal mechanism between
NbCycB2
and
Nbwo
during the trichome formation in
Nicotiana benthamiana
.
Highlight
NbCycB2
is specifically expressed in trichomes of
Nicotiana benthamiana
and represses the Nbwo activity via a negative feedback loop in tobacco trichome developmemt.
Title: NbCycB2 represses Nbwo activity via a negative feedback loop in the tobacco trichome developmemt
Description:
Abstract
The wo protein and its downstream gene,
SlCycB2
have been demonstrated to regulate the trichome development in tomato.
It was shown that only gain-of-function mutant form of
wo, Wo
v
(wo woolly motif mutant allele) could induce the increase of trichome density.
However, it is still unclear the relationships between wo,
Wo
v
and
SlCycB2
in trichome regulation.
In this study, we demonstrated Nbwo (NbWo
v
) directly regulated the expressions
NbCycB2
by binding to the promoter of
NbCycB2
and its genomic sequences.
As a feedback regulation, NbCycB2 negatively regulates the trichome formation by repressing Nbwo activity at protein level.
We further found that the mutations of Nbwo woolly motif could prevent repression of NbWo
v
by NbCycB2, which results in the significant increase of active
Nbwo
proteins, trichome density and branches.
Our results revealed a novel reciprocal mechanism between
NbCycB2
and
Nbwo
during the trichome formation in
Nicotiana benthamiana
.
Highlight
NbCycB2
is specifically expressed in trichomes of
Nicotiana benthamiana
and represses the Nbwo activity via a negative feedback loop in tobacco trichome developmemt.
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