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

Wu, Tao, Kamiya, Takehiro, Yumoto, Hiroko, Sotta, Naoyuki ORCID: https://orcid.org/0000-0001-5558-5155, 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:	04 May 2023 22:15
URI:	https://orca.cardiff.ac.uk/id/eprint/122323

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