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ER-localized auxin transporter PIN8 regulates auxin homeostasis and male gametophyte development in Arabidopsis

by Petrášek, Jan , Wang, Bangjun , Mravec, Jozef , Pollmann, Stephan , Orellana, Ariel , Friml, Jiří , Simon, Sibu , Ding, Zhaojun , Moreno, Ignacio , Chen, Xu , Zažímalová, Eva , Carraro, Nicola , Murphy, Angus , Geisler, Markus , Reemmer, Jesica , Tejos, Ricardo , Pěnčík, Aleš , Dupláková, Nikoleta , Honys, David , Rolčík, Jakub , Skůpa, Petr

in 631/449/1741/1576 / 631/449/2653 / 631/449/2675 / 631/449/448/2651 / Arabidopsis - genetics / Arabidopsis - growth & development / Arabidopsis - metabolism / Arabidopsis Proteins - genetics / Arabidopsis Proteins - metabolism / Endoplasmic Reticulum - metabolism / Gene Expression Regulation, Plant / Humanities and Social Sciences / Indoleacetic Acids - metabolism / multidisciplinary / Pollen / Pollen - growth & development / Pollen - metabolism / Science / Science (multidisciplinary)

2012

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ER-localized auxin transporter PIN8 regulates auxin homeostasis and male gametophyte development in Arabidopsis

2012

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ER-localized auxin transporter PIN8 regulates auxin homeostasis and male gametophyte development in Arabidopsis

2012

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Journal Article

ER-localized auxin transporter PIN8 regulates auxin homeostasis and male gametophyte development in Arabidopsis

Petrášek, Jan,

Wang, Bangjun,

Mravec, Jozef,

Pollmann, Stephan,

Orellana, Ariel,

Friml, Jiří,

Simon, Sibu,

Ding, Zhaojun,

Moreno, Ignacio,

Chen, Xu,

Zažímalová, Eva,

Carraro, Nicola,

Murphy, Angus,

Geisler, Markus,

Reemmer, Jesica,

Tejos, Ricardo,

Pěnčík, Aleš,

Dupláková, Nikoleta,

Honys, David,

Rolčík, Jakub,

Skůpa, Petr

2012

Overview

Auxin is a key coordinative signal required for many aspects of plant development and its levels are controlled by auxin metabolism and intercellular auxin transport. Here we find that a member of PIN auxin transporter family, PIN8 is expressed in male gametophyte of Arabidopsis thaliana and has a crucial role in pollen development and functionality. Ectopic expression in sporophytic tissues establishes a role of PIN8 in regulating auxin homoeostasis and metabolism. PIN8 co-localizes with PIN5 to the endoplasmic reticulum (ER) where it acts as an auxin transporter. Genetic analyses reveal an antagonistic action of PIN5 and PIN8 in the regulation of intracellular auxin homoeostasis and gametophyte as well as sporophyte development. Our results reveal a role of the auxin transport in male gametophyte development in which the distinct actions of ER-localized PIN transporters regulate cellular auxin homoeostasis and maintain the auxin levels optimal for pollen development and pollen tube growth. Plant hormones, such as auxin, coordinate plant development. In this study, an auxin transporter—PIN8—that is expressed in the male gametophyte of Arabidopsis thaliana , is found to regulate cellular homoeostasis and maintain optimal levels of auxin for pollen development.

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Publisher

Nature Publishing Group UK,Nature Publishing Group

Subject

/ Arabidopsis - genetics

/ Arabidopsis - growth & development

/ Arabidopsis - metabolism