Universität zu Köln

Brilhaus, Dominik ORCID: 0000-0001-9021-3197, Braeutigam, Andrea, Mettler-Altmann, Tabea, Winter, Klaus and Weber, Andreas P. M. (2016). Reversible Burst of Transcriptional Changes during Induction of Crassulacean Acid Metabolism in Talinum triangulare. Plant Physiol., 170 (1). S. 102 - 123. ROCKVILLE: AMER SOC PLANT BIOLOGISTS. ISSN 1532-2548

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Abstract

Drought tolerance is a key factor for agriculture in the 21st century as it is a major determinant of plant survival in natural ecosystems as well as crop productivity. Plants have evolved a range of mechanisms to cope with drought, including a specialized type of photosynthesis termed Crassulacean acid metabolism(CAM). CAM is associated with stomatal closure during the day as atmospheric CO2 is assimilated primarily during the night, thus reducing transpirational water loss. The tropical herbaceous perennial species Talinum triangulare is capable of transitioning, in a facultative, reversible manner, from C-3 photosynthesis to weakly expressed CAM in response to drought stress. The transcriptional regulation of this transition has been studied. Combining mRNA-Seq with targeted metabolite measurements, we found highly elevated levels of CAM-cycle enzyme transcripts and their metabolic products in T. triangulare leaves upon water deprivation. The carbohydrate metabolism is rewired to reduce the use of reserves for growth to support the CAM-cycle and the synthesis of compatible solutes. This large-scale expression dataset of drought-induced CAM demonstrates transcriptional regulation of the C-3-CAM transition. We identified candidate transcription factors to mediate this photosynthetic plasticity, which may contribute in the future to the design of more drought-tolerant crops via engineered CAM.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Brilhaus, Dominik UNSPECIFIED orcid.org/0000-0001-9021-3197 UNSPECIFIED Braeutigam, Andrea UNSPECIFIED UNSPECIFIED UNSPECIFIED Mettler-Altmann, Tabea UNSPECIFIED UNSPECIFIED UNSPECIFIED Winter, Klaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Weber, Andreas P. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-293350
DOI:	10.1104/pp.15.01076
Journal or Publication Title:	Plant Physiol.
Volume:	170
Number:	1
Page Range:	S. 102 - 123
Date:	2016
Publisher:	AMER SOC PLANT BIOLOGISTS
Place of Publication:	ROCKVILLE
ISSN:	1532-2548
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PHOSPHOENOLPYRUVATE CARBOXYLASE KINASE; 2C PROTEIN PHOSPHATASES; ZINC-FINGER PROTEIN; COMMON ICE PLANT; ABSCISIC-ACID; MESEMBRYANTHEMUM-CRYSTALLINUM; MESSENGER-RNA; ENZYMATIC CHARACTERISTICS; SIGNAL-TRANSDUCTION; C-4 PHOTOSYNTHESIS Multiple languages Plant Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/29335