Shy Girl , a kiwifruit suppressor of feminization, restricts gynoecium development via regulation of cytokinin metabolism and signaling

2021 ◽  
Author(s):  
Erika Varkonyi‐Gasic ◽  
Tianchi Wang ◽  
Janine Cooney ◽  
Subin Jeon ◽  
Charlotte Voogd ◽  
...  
Keyword(s):  
Cytokinin Metabolism ◽  
Gynoecium Development

scholarly journals The Relationship between AGAMOUS and Cytokinin Signaling in the Establishment of Carpeloid Features

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 827
Author(s):  
Andrea Gómez-Felipe ◽  
Daniel Kierzkowski ◽  
Stefan de Folter
Keyword(s):  
Regulatory Network ◽  
Dependent Manner ◽  
Mads Box ◽  
Type B ◽  
Cytokinin Signaling ◽  
Reproductive Structures ◽  
Carpel Development ◽  
Gene Regulatory ◽  
The Relationship ◽  
Gynoecium Development

Gynoecium development is dependent on gene regulation and hormonal pathway interactions. The phytohormones auxin and cytokinin are involved in many developmental programs, where cytokinin is normally important for cell division and meristem activity, while auxin induces cell differentiation and organ initiation in the shoot. The MADS-box transcription factor AGAMOUS (AG) is important for the development of the reproductive structures of the flower. Here, we focus on the relationship between AG and cytokinin in Arabidopsis thaliana, and use the weak ag-12 and the strong ag-1 allele. We found that cytokinin induces carpeloid features in an AG-dependent manner and the expression of the transcription factors CRC, SHP2, and SPT that are involved in carpel development. AG is important for gynoecium development, and contributes to regulating, or else directly regulates CRC, SHP2, and SPT. All four genes respond to either reduced or induced cytokinin signaling and have the potential to be regulated by cytokinin via the type-B ARR proteins. We generated a model of a gene regulatory network, where cytokinin signaling is mainly upstream and in parallel with AG activity.

scholarly journals Isoprene enhances leaf cytokinin metabolism and induces early senescence

2021 ◽  
Author(s):  
Kaidala Ganesha Srikanta Dani ◽  
Susanna Pollastri ◽  
Sara Pinosio ◽  
Michael Reichelt ◽  
Thomas D Sharkey ◽  
...  
Keyword(s):  
Cytokinin Metabolism

scholarly journals STY1 and STY2 promote the formation of apical tissues during Arabidopsis gynoecium development

Development ◽  
2002 ◽  
Vol 129 (20) ◽  
pp. 4707-4717 ◽  
Author(s):  
Sandra Kuusk ◽  
Joel J. Sohlberg ◽  
Jeff A. Long ◽  
Ingela Fridborg ◽  
Eva Sundberg
Keyword(s):  
Double Mutant ◽  
Ectopic Expression ◽  
Ring Finger ◽  
Regional Differentiation ◽  
35S Promoter ◽  
Insertion Mutation ◽  
Wild Type ◽  
Transposon Insertion ◽  
Visible Effect ◽  
Gynoecium Development

Gynoecium ontogenesis in Arabidopsis is accomplished by the co-ordinated activity of genes that control patterning and the regional differentiation of tissues, and ultimately results in the formation of a basal ovary, a short style and an apical stigma. A transposon insertion in the STYLISH1 (STY1) gene results in gynoecia with aberrant style morphology, while an insertion mutation in the closely related STYLISH2 (STY2) gene has no visible effect on gynoecium development. However, sty1-1 sty2-1 double mutant plants exhibit an enhanced sty1-1 mutant phenotype and are characterized by a further reduction in the amount of stylar and stigmatic tissues and decreased proliferation of stylar xylem. These data imply that STY1 and STY2 are partially redundant and that both genes promote style and stigma formation and influence vascular development during Arabidopsis gynoecium development. Consistently, STY1 and STY2 are expressed in the apical parts of the developing gynoecium and ectopic expression of either STY1 or STY2 driven by the CaMV 35S promoter is sufficient to transform valve cells into style cells. STY1::GUS and STY2::GUS activity is detected in many other organs as well as the gynoecium, suggesting that STY1 and STY2 may have additional functions. This is supported by the sty1-1 sty2-1 double mutants producing rosette and cauline leaves with a higher degree of serration than wild-type leaves. STY1 and STY2 are members of a small gene family, and encode proteins with a RING finger-like motif. Double mutant analyses indicate that STY1 genetically interacts with SPATULA and possibly also with CRABS CLAW.

The stay-green phenotype of wheat mutant tasg1 is associated with altered cytokinin metabolism

2015 ◽  
Vol 35 (3) ◽  
pp. 585-599 ◽  
Author(s):  
Wenqiang Wang ◽  
Qunqun Hao ◽  
Fengxia Tian ◽  
Qinxue Li ◽  
Wei Wang
Keyword(s):  
Cytokinin Metabolism ◽  
Stay Green ◽  
Wheat Mutant

Cytokinin Metabolism and Signal Transduction

2007 ◽  
pp. 93-123 ◽  
Author(s):  
Alexander Heyl ◽  
Tomás̆ Werner ◽  
Thomas Schmülling
Keyword(s):  
Signal Transduction ◽  
Cytokinin Metabolism

4 Molecular Genetics of Gynoecium Development in Arabidopsis

1999 ◽  
pp. 155-205 ◽  
Author(s):  
John L. Bowman ◽  
Stuart F. Baum ◽  
Yuval Eshed ◽  
Joanna Putterill ◽  
John Alvarez
Keyword(s):  
Molecular Genetics ◽  
Gynoecium Development
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