Universität zu Köln

Racca, Sofia, Welchen, Elina, Gras, Diana E., Tarkowska, Danuse ORCID: 0000-0003-1478-1904, Tureckova, Veronika, Maurino, Veronica G. and Gonzalez, Daniel H. (2018). Interplay between cytochrome c and gibberellins during Arabidopsis vegetative development. Plant J., 94 (1). S. 105 - 122. HOBOKEN: WILEY. ISSN 1365-313X

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Abstract

We studied the effect of reducing the levels of the mitochondrial electron carrier cytochrome c (CYTc) in Arabidopsis thaliana. Plants with CYTc deficiency have delayed growth and development, and reach flowering several days later than the wild-type but with the same number of leaves. CYTc-deficient plants accumulate starch and glucose during the day, and contain lower levels of active gibberellins (GA) and higher levels of DELLA proteins, involved in GA signaling. GA treatment abolishes the developmental delay and reduces glucose accumulation in CYTc-deficient plants, which also show a lower raise in ATP levels in response to glucose. Treatment of wild-type plants with inhibitors of mitochondrial energy production limits plant growth and increases the levels of DELLA proteins, thus mimicking the effects of CYTc deficiency. In addition, an increase in the amount of CYTc decreases DELLA protein levels and expedites growth, and this depends on active GA synthesis. We conclude that CYTc levels impinge on the activity of the GA pathway, most likely through changes in mitochondrial energy production. In this way, hormone-dependent growth would be coupled to the activity of components of the mitochondrial respiratory chain. Significance Statement The mitochondrial electron carrier cytochrome c participates in the canonical, energy-producing pathway of respiration. Here, we show that changes in the amount of cytochrome c influence the levels of DELLA proteins, which are inhibitors of the response to the growth-promoting hormones gibberellins, thus linking mitochondrial function to hormone-dependent growth.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Racca, Sofia UNSPECIFIED UNSPECIFIED UNSPECIFIED Welchen, Elina UNSPECIFIED UNSPECIFIED UNSPECIFIED Gras, Diana E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tarkowska, Danuse UNSPECIFIED orcid.org/0000-0003-1478-1904 UNSPECIFIED Tureckova, Veronika UNSPECIFIED UNSPECIFIED UNSPECIFIED Maurino, Veronica G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gonzalez, Daniel H. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-191564
DOI:	10.1111/tpj.13845
Journal or Publication Title:	Plant J.
Volume:	94
Number:	1
Page Range:	S. 105 - 122
Date:	2018
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1365-313X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MITOCHONDRIAL COMPLEX I; ELECTRON-TRANSPORT; PLANT-GROWTH; ALTERNATIVE OXIDASE; MASS-SPECTROMETRY; SEED-GERMINATION; STRESS RESPONSES; GENE ENCODES; EXPRESSION; THALIANA Multiple languages Plant Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19156