Universität zu Köln

Ponnu, Jathish ORCID: 0000-0002-3276-7068, Schlereth, Armin ORCID: 0000-0001-9383-2145, Zacharaki, Vasiliki ORCID: 0000-0002-5543-2332, Dzialo, Magdalena A., Abel, Christin, Feil, Regina ORCID: 0000-0002-9936-1337, Schmid, Markus ORCID: 0000-0002-0068-2967 and Wahl, Vanessa (2020). The trehalose 6-phosphate pathway impacts vegetative phase change in Arabidopsis thaliana. Plant J., 104 (3). S. 768 - 781. HOBOKEN: WILEY. ISSN 1365-313X

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Abstract

The vegetative phase change marks the beginning of the adult phase in the life cycle of plants and is associated with a gradual decline in the microRNA miR156, in response to sucrose status. Trehalose 6-phosphate (T6P) is a sugar molecule with signaling function reporting the current sucrose state. To elucidate the role of T6P signaling in vegetative phase change, molecular, genetic, and metabolic analyses were performed using Arabidopsis thalianaloss-of-function lines in TREHALOSE PHOSPHATE SYNTHASE1(TPS1), a gene coding for an enzyme that catalyzes the production of T6P. These lines show a significant delay in vegetative phase change, under both short and long day conditions. Induced expression of TPS1 complements this delay in the TPS1 knockout mutant (tps1-2 GVG::TPS1). Further analyses indicate that the T6P pathway promotes vegetative phase transition by suppressing miR156 expression and thereby modulating the levels of its target transcripts, the SQUAMOSA PROMOTER BINDING PROTEIN-LIKE genes.TPS1 knockdown plants, with a delayed vegetative phase change phenotype, accumulate significantly more sucrose than wild-type plants as a result of a feedback mechanism. In summary, we conclude that the T6P pathway forms an integral part of an endogenous mechanism that influences phase transitions dependent on the metabolic state.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ponnu, Jathish UNSPECIFIED orcid.org/0000-0002-3276-7068 UNSPECIFIED Schlereth, Armin UNSPECIFIED orcid.org/0000-0001-9383-2145 UNSPECIFIED Zacharaki, Vasiliki UNSPECIFIED orcid.org/0000-0002-5543-2332 UNSPECIFIED Dzialo, Magdalena A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Abel, Christin UNSPECIFIED UNSPECIFIED UNSPECIFIED Feil, Regina UNSPECIFIED orcid.org/0000-0002-9936-1337 UNSPECIFIED Schmid, Markus UNSPECIFIED orcid.org/0000-0002-0068-2967 UNSPECIFIED Wahl, Vanessa UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-319709
DOI:	10.1111/tpj.14965
Journal or Publication Title:	Plant J.
Volume:	104
Number:	3
Page Range:	S. 768 - 781
Date:	2020
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1365-313X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SHOOT MATURATION; TREHALOSE-6-PHOSPHATE SYNTHASE-1; GENES; SUGAR; MICRORNAS; SUCROSE; LEAF; MORPHOGENESIS; METABOLISM; TRANSITION Multiple languages Plant Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/31970