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Received: 2012-12-17

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Journal of Zhejiang University SCIENCE B 2013 Vol.14 No.7 P.563-569


GLABROUS INFLORESCENCE STEMS regulates trichome branching by genetically interacting with SIM in Arabidopsis

Author(s):  Li-li Sun, Zhong-jing Zhou, Li-jun An, Yan An, Yong-qin Zhao, Xiao-fang Meng, Clare Steele-King, Yin-bo Gan

Affiliation(s):  Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China; more

Corresponding email(s):   ygan@zju.edu.cn

Key Words:  Arabidopsis thaliana, GLABROUS INFLORESCENCE STEMS (GIS), Endoreduplication, SIAMESE (SIM), Trichome branching, Genetic interaction

Li-li Sun, Zhong-jing Zhou, Li-jun An, Yan An, Yong-qin Zhao, Xiao-fang Meng, Clare Steele-King, Yin-bo Gan. GLABROUS INFLORESCENCE STEMS regulates trichome branching by genetically interacting with SIM in Arabidopsis[J]. Journal of Zhejiang University Science B, 2013, 14(7): 563-569.

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author="Li-li Sun, Zhong-jing Zhou, Li-jun An, Yan An, Yong-qin Zhao, Xiao-fang Meng, Clare Steele-King, Yin-bo Gan",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

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%T GLABROUS INFLORESCENCE STEMS regulates trichome branching by genetically interacting with SIM in Arabidopsis
%A Li-li Sun
%A Zhong-jing Zhou
%A Li-jun An
%A Yan An
%A Yong-qin Zhao
%A Xiao-fang Meng
%A Clare Steele-King
%A Yin-bo Gan
%J Journal of Zhejiang University SCIENCE B
%V 14
%N 7
%P 563-569
%@ 1673-1581
%D 2013
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1200349

T1 - GLABROUS INFLORESCENCE STEMS regulates trichome branching by genetically interacting with SIM in Arabidopsis
A1 - Li-li Sun
A1 - Zhong-jing Zhou
A1 - Li-jun An
A1 - Yan An
A1 - Yong-qin Zhao
A1 - Xiao-fang Meng
A1 - Clare Steele-King
A1 - Yin-bo Gan
J0 - Journal of Zhejiang University Science B
VL - 14
IS - 7
SP - 563
EP - 569
%@ 1673-1581
Y1 - 2013
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B1200349

Arabidopsis trichomes are large branched single cells that protrude from the epidermis. The first morphological indication of trichome development is an increase in nuclear content resulting from an initial cycle of endoreduplication. Our previous study has shown that the C2H2 zinc finger protein GLABROUS INFLORESCENCE STEMS (GIS) is required for trichome initiation in the inflorescence organ and for trichome branching in response to gibberellic acid signaling, although GIS gene does not play a direct role in regulating trichome cell division. Here, we describe a novel role of GIS, controlling trichome cell division indirectly by interacting genetically with a key endoreduplication regulator SIAMESE (SIM). Our molecular and genetic studies have shown that GIS might indireclty control cell division and trichome branching by acting downstream of SIM. A loss of function mutation of SIM signficantly reduced the expression of GIS. Futhermore, the overexpression of GIS rescued the trichome cluster cell phenotypes of sim mutant. The gain or loss of function of GIS had no significant effect on the expression of SIM. These results suggest that GIS may play an indirect role in regulating trichome cell division by genetically interacting with SIM.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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