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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.12
- 수록면
- 1,033 - 1,044 (12page)
- DOI
- 10.14348/molcells.2018.0363
이용수
초록· 키워드
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As sessile organisms, plants have evolved to adjust their growth and development to environmental changes. It has been well documented that the crosstalk between different plant hormones plays important roles in the coordination of growth and development of the plant. Here, we describe a novel recessive mutant, mildly insensitive to ethylene (mine), which displayed insensitivity to the ethylene precursor, ACC (1-aminocyclopropane-1-carboxylic acid), in the root under the dark-grown conditions. By contrast, mine roots exhibited a normal growth response to exogenous IAA (indole-3-acetic acid). Thus, it appears that the growth responses of mine to ACC and IAA resemble those of weak ethylene insensitive (wei) mutants. To understand the molecular events underlying the crosstalk between ethylene and auxin in the root, we identified the MINE locus and found that the MINE gene encodes the pyridoxine 5′-phosphate (PNP)/pyridoxamine 5′-phosphate (PMP) oxidase, PDX3. Our results revealed that MINE/PDX3 likely plays a role in the conversion of the auxin precursor tryptophan to indole-3-pyruvic acid in the auxin biosynthesis pathway, in which TAA1 (TRYPTOPHAN AMINOTRANSFERASE OF ARABIDOPSIS 1) and its related genes (TRYPTOPHAN AMINOTRANSFERASE RELATED 1 and 2; TAR1 and TAR2) are involved. Considering that TAA1 and TARs belong to a subgroup of PLP (pyridoxal-5′-phosphate)-dependent enzymes, we propose that PLP produced by MINE/PDX3 acts as a cofactor in TAA1/TAR-dependent auxin biosynthesis induced by ethylene, which in turn influences the crosstalk between ethylene and auxin in the Arabidopsis root.
목차
등록된 정보가 없습니다.
참고문헌 (73)
참고문헌 신청
Abel, S. / 1995 / ACS4, a primary indoleacetic acid-responsive gene encoding 1-aminocyclopropane-1-carboxylate synthase in Arabidopsis thaliana. Structural characterization, expression in Escherichia coli, and expression characteristics in response to auxin [corrected] / J. Biol. Chem 270:19093~19099
Achard, P. / 2009 / Gibberellin signaling controls cell proliferation rate in Arabidopsis / Curr. Biol 19:1188~1193
Alarcón, M. V. / 2014 / Synergistic action of auxin and ethylene on root elongation inhibition is caused by a reduction of epidermal cell length / Plant Signal. Behav 9:e28361
Alonso, J. M. / 1999 / EIN2, a bifunctional transducer of ethylene and stress responses in Arabidopsis / Science 284:2148~2152
Alonso, J. M. / 2003 / Five components of the ethylene-response pathway identified in a screen for weak ethylene insensitive mutants in Arabidopsis / Proc. Natl. Acad. Sci. USA 100:2992~2997
Achard, P. / 2009 / Gibberellin signaling controls cell proliferation rate in Arabidopsis / Curr. Biol 19:1188~1193
Alarcón, M. V. / 2014 / Synergistic action of auxin and ethylene on root elongation inhibition is caused by a reduction of epidermal cell length / Plant Signal. Behav 9:e28361
Alonso, J. M. / 1999 / EIN2, a bifunctional transducer of ethylene and stress responses in Arabidopsis / Science 284:2148~2152
Alonso, J. M. / 2003 / Five components of the ethylene-response pathway identified in a screen for weak ethylene insensitive mutants in Arabidopsis / Proc. Natl. Acad. Sci. USA 100:2992~2997
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