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An Arabidopsis thaliana copper-sensitive mutant suggests a role of phytosulfokine in ethylene production

Wu, Tao, Kamiya, Takehiro, Yumoto, Hiroko, Sotta, Naoyuki, Katsushi, Yamaguchi, Shigenobu, Shuji, Matsubayashi, Yoshikatsu and Fujiwara, Toru 2015. An Arabidopsis thaliana copper-sensitive mutant suggests a role of phytosulfokine in ethylene production. Journal of Experimental Botany 66 (13) , pp. 3657-3667. 10.1093/jxb/erv105

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Abstract

To increase our understanding of the adaptation for copper (Cu) deficiency, Arabidopsis mutants with apparent alterations under Cu deficiency were identified. In this report, a novel mutant, tpst-2, was found to be more sensitive than wild-type (Col-0) plants to Cu deficiency during root elongation. The positional cloning of tpst-2 revealed that this gene encodes a tyrosylprotein sulfotransferase (TPST). Moreover, the ethylene production of tpst-2 mutant was higher than that of Col-0 under Cu deficiency, and adding the ethylene response inhibitor AgNO3 partially rescued defects in root elongation. Interestingly, peptide hormone phytosulfokine (PSK) treatment also repressed the ethylene production of tpst-2 mutant plants. Our results revealed that TPST suppressed ethylene production through the action of PSK.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Publisher: Oxford University Press
ISSN: 0022-0957
Date of First Compliant Deposit: 14 May 2019
Date of Acceptance: 16 February 2015
Last Modified: 10 Nov 2021 02:23
URI: https://orca.cardiff.ac.uk/id/eprint/122323

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