The Homeotic Protein AGAMOUS Controls Late Stamen Development by Regulating a Jasmonate Biosynthetic Gene in Arabidopsis.

The Homeotic Protein AGAMOUS Controls Late Stamen Development by Regulating a Jasmonate Biosynthetic Gene in Arabidopsis. Research Abstract Details 

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The Homeotic Protein AGAMOUS Controls Late Stamen Development by Regulating a Jasmonate Biosynthetic Gene in Arabidopsis. Abstract Text:

Toshiro Ito,Kian-Hong Ng,Tze-Soo Lim,Hao Yu,Elliot M Meyerowitz,Toshiro Ito,Kian-Hong Ng,Tze-Soo Lim,Hao Yu,Elliot M Meyerowitz,

The Arabidopsis thaliana floral homeotic gene AGAMOUS (AG) plays a central role in reproductive organ (stamen and carpel) development. AG RNA is expressed in the center of floral primordia from a time prior to the initiation of stamen and carpel primordia until late in flower development. While early AG expression acts in specification of stamens and carpels, the role, if any, of continued AG expression in later flower development is unknown. To examine the timing of AG action and its possible late-stage functions, we performed a series of time-course experiments using a transgenic line with inducible AG activity in an ag homozygous mutant background. We show that AG controls late-stage stamen development, including anther morphogenesis and dehiscence, as well as filament formation and elongation. We further show that AG coordinates late stamen maturation by controlling a biosynthetic gene of the lipid-derived phytohormone jasmonic acid (JA). Expression analysis and in vivo binding of AG indicate that AG directly regulates the transcription of a catalytic enzyme of JA, DEFECTIVE IN ANTHER DEHISCENCE1. Our results indicate that stamen identity and differentiation control by AG is achieved by the regulation of different transcriptional cascades in different floral stages, with organ specification induced early, followed by phytohormone biosynthesis to coordinate stamen maturation.

The Homeotic Protein AGAMOUS Controls Late Stamen Development by Regulating a Jasmonate Biosynthetic Gene in Arabidopsis. Publishing Authors By Initials

T Ito,KH Ng,TS Lim,H Yu,EM Meyerowitz,T Ito,KH Ng,TS Lim,H Yu,EM Meyerowitz,

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The Homeotic Protein AGAMOUS Controls Late Stamen Development by Regulating a Jasmonate Biosynthetic Gene in Arabidopsis. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Plant cell

VOLUME: 19

Page Numbers: 3516-29

Journal Abbreviation: Plant Cell

ISSN: 1040-4651

DAY: 2

MONTH: 11

YEAR: 2007

The Homeotic Protein AGAMOUS Controls Late Stamen Development by Regulating a Jasmonate Biosynthetic Gene in Arabidopsis. Information

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LANGUAGE: eng

NlmUniqueID: 9208688

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AFFILIATION: Temasek Life Sciences Laboratory, National University of Singapore, Singapore 117604, Singapore.

Country: United States

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MEDLINETA: Plant Cell

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