NDLI: Functional characterization of duplicated B-class MADS-box genes in Japanese gentian

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Functional characterization of duplicated B-class MADS-box genes in Japanese gentian

Content Provider	Springer Nature Link
Author	Nakatsuka, Takashi Saito, Misa Nishihara, Masahiro
Copyright Year	2016
Abstract	The heterodimer formation between B-class MADS-box proteins of GsAP3a and GsPI2 proteins plays a core role for petal formation in Japanese gentian plants. We previously isolated six B-class MADS-box genes (GsAP3a, GsAP3b, GsTM6, GsPI1, GsPI2, and GsPI3) from Japanese gentian (Gentiana scabra). To study the roles of these MADS-box genes in determining floral organ identities, we investigated protein–protein interactions among them and produced transgenic Arabidopsis and gentian plants overexpressing GsPI2 alone or in combination with GsAP3a or GsTM6. Yeast two-hybrid and bimolecular fluorescence complementation analyses revealed that among the GsPI proteins, GsPI2 interacted with both GsAP3a and GsTM6, and that these heterodimers were localized to the nuclei. The heterologous expression of GsPI2 partially converted sepals into petaloid organs in transgenic Arabidopsis, and this petaloid conversion phenomenon was accelerated by combined expression with GsAP3a but not with GsTM6. In contrast, there were no differences in morphology between vector-control plants and transgenic Arabidopsis plants expressing GsAP3a or GsTM6 alone. Transgenic gentian ectopically expressing GsPI2 produced an elongated tubular structure that consisted of an elongated petaloid organ in the first whorl and stunted inner floral organs. These results imply that the heterodimer formation between GsPI2 and GsAP3a plays a core role in determining petal and stamen identities in Japanese gentian, but other B-function genes might be important for the complete development of petal organs.
Starting Page	895
Ending Page	904
Page Count	10
File Format	PDF
ISSN	07217714
Journal	Plant Cell Reports
Volume Number	35
Issue Number	4
e-ISSN	1432203X
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-01-14
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	B-class MADS-box gene Japanese gentian Modified ABC model Petal identity Transgenic plant Plant Sciences Cell Biology Biotechnology Plant Biochemistry
Content Type	Text
Resource Type	Article
Subject	Plant Science Medicine Agronomy and Crop Science

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