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Nucleoredoxin2 (NRX2) Promotes Jasmonate-Mediated Trichome Formation in Arabidopsis

한국식물학회지 2020년 63권 6호 p.495 ~ 503
이은선, 박정훈, 황광용, 치용훈, 강창호, 채호병, 팽설기, 위성동, 배수빈, Phan Kieu Anh Thi, 이상열,
소속 상세정보
이은선 ( Lee Eun-Seon ) - Gyeongsang National University Division of Applied Life Science
박정훈 ( Park Joung-Hun ) - Gyeongsang National University Division of Applied Life Science
황광용 ( Hwang Gwang-Yong ) - Gyeongsang National University Division of Applied Life Science
치용훈 ( Chi Yong-Hun ) - Sejong National Arboretum Plant Production Division
강창호 ( Kang Chang-Ho ) - Gyeongsang National University Division of Applied Life Science
채호병 ( Chae Ho-Byoung ) - Gyeongsang National University Division of Applied Life Science
팽설기 ( Paeng Seol-Ki ) - Gyeongsang National University Division of Applied Life Science
위성동 ( Wi Seong-Dong ) - Gyeongsang National University Division of Applied Life Science
배수빈 ( Bae Su-Bin ) - Gyeongsang National University Division of Applied Life Science
 ( Phan Kieu Anh Thi ) - Gyeongsang National University Division of Applied Life Science
이상열 ( Lee Sang-Yeol ) - Gyeongsang National University Division of Applied Life Science

Abstract


Thioredoxin (Trx) proteins are essential for the maintenance of cellular redox balance through thiol/disulfide exchange modification. In Arabidopsis, the Trx superfamily consists of multiple protein isotypes distributed in most cellular compartments. Although the functions of chloroplastic and cytosolic Trxs have been investigated in plants, the physiological role of nuclear Trx proteins remains elusive. Nucleoredoxin (NRX) is a nuclear Trx first identified in eukaryotic organisms. Arabidopsis possesses two NRX genes (AtNRX1 and AtNRX2), and the function of AtNRX2 has not been elucidated to date. In this study, we characterized the function of AtNRX2 using the atnrx2 knockout mutant, based on its comparison with the atnrx1 mutant. In atnrx2 knockout mutant plants, trichome number was significantly reduced compared with the wild type (WT; Col-0) and the atnrx1 mutant. In response to JA induction of trichome, trichome formation was markedly diminished in the atnrx2 mutant. In addition, expression levels of genes involved in trichome formation were reduced in the atnrx2 mutant compared with the WT and atnrx1 mutant. Overall, our results suggest that AtNRX2 plays a physiological role in JA-mediated trichome formation in Arabidopsis.

키워드

Arabidopsis; Jasmonate; Nucleoredoxin; Redox protein; Trichome

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