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The jasmonate-responsive GTR1 transporter is required for gibberellin-mediated stamen development in Arabidopsis.


ABSTRACT: Plant hormones are transported across cell membranes during various physiological events. Recent identification of abscisic acid and strigolactone transporters suggests that transport of various plant hormones across membranes does not occur by simple diffusion but requires transporter proteins that are strictly regulated during development. Here, we report that a major glucosinolate transporter, GTR1/NPF2.10, is multifunctional and may be involved in hormone transport in Arabidopsis thaliana. When heterologously expressed in oocytes, GTR1 transports jasmonoyl-isoleucine and gibberellin in addition to glucosinolates. gtr1 mutants are severely impaired in filament elongation and anther dehiscence resulting in reduced fertility, but these phenotypes can be rescued by gibberellin treatment. These results suggest that GTR1 may be a multifunctional transporter for the structurally distinct compounds glucosinolates, jasmonoyl-isoleucine and gibberellin, and may positively regulate stamen development by mediating gibberellin supply.

SUBMITTER: Saito H 

PROVIDER: S-EPMC4347201 | biostudies-literature | 2015 Feb

REPOSITORIES: biostudies-literature

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The jasmonate-responsive GTR1 transporter is required for gibberellin-mediated stamen development in Arabidopsis.

Saito Hikaru H   Oikawa Takaya T   Hamamoto Shin S   Ishimaru Yasuhiro Y   Kanamori-Sato Miyu M   Sasaki-Sekimoto Yuko Y   Utsumi Tomoya T   Chen Jing J   Kanno Yuri Y   Masuda Shinji S   Kamiya Yuji Y   Seo Mitsunori M   Uozumi Nobuyuki N   Ueda Minoru M   Ohta Hiroyuki H  

Nature communications 20150204


Plant hormones are transported across cell membranes during various physiological events. Recent identification of abscisic acid and strigolactone transporters suggests that transport of various plant hormones across membranes does not occur by simple diffusion but requires transporter proteins that are strictly regulated during development. Here, we report that a major glucosinolate transporter, GTR1/NPF2.10, is multifunctional and may be involved in hormone transport in Arabidopsis thaliana. W  ...[more]

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