Universität zu Köln

Breuillin, Florence, Schramm, Jonathan, Hajirezaei, Mohammad, Ahkami, Amir, Favre, Patrick, Druege, Uwe, Hause, Bettina, Bucher, Marcel, Kretzschmar, Tobias, Bossolini, Eligio, Kuhlemeier, Cris, Martinoia, Enrico, Franken, Philipp, Scholz, Uwe ORCID: 0000-0001-6113-3518 and Reinhardt, Didier ORCID: 0000-0003-3495-6783 (2010). Phosphate systemically inhibits development of arbuscular mycorrhiza in Petunia hybrida and represses genes involved in mycorrhizal functioning. Plant J., 64 (6). S. 1002 - 1018. HOBOKEN: WILEY. ISSN 1365-313X

Full text not available from this repository.

Abstract

P>Most terrestrial plants form arbuscular mycorrhiza (AM), mutualistic associations with soil fungi of the order Glomeromycota. The obligate biotrophic fungi trade mineral nutrients, mainly phosphate (P-i), for carbohydrates from the plants. Under conditions of high exogenous phosphate supply, when the plant can meet its own P requirements without the fungus, AM are suppressed, an effect which could be interpreted as an active strategy of the plant to limit carbohydrate consumption of the fungus by inhibiting its proliferation in the roots. However, the mechanisms involved in fungal inhibition are poorly understood. Here, we employ a transcriptomic approach to get insight into potential shifts in metabolic activity and symbiotic signalling, and in the defence status of plants exposed to high P-i levels. We show that in mycorrhizal roots of petunia, a similar set of symbiosis-related genes is expressed as in mycorrhizal roots of Medicago, Lotus and rice. P-i acts systemically to repress symbiotic gene expression and AM colonization in the root. In established mycorrhizal roots, P-i repressed symbiotic gene expression rapidly, whereas the inhibition of colonization followed with a lag of more than a week. Taken together, these results suggest that P-i acts by repressing essential symbiotic genes, in particular genes encoding enzymes of carotenoid and strigolactone biosynthesis, and symbiosis-associated phosphate transporters. The role of these effects in the suppression of symbiosis under high P-i conditions is discussed.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Breuillin, Florence UNSPECIFIED UNSPECIFIED UNSPECIFIED Schramm, Jonathan UNSPECIFIED UNSPECIFIED UNSPECIFIED Hajirezaei, Mohammad UNSPECIFIED UNSPECIFIED UNSPECIFIED Ahkami, Amir UNSPECIFIED UNSPECIFIED UNSPECIFIED Favre, Patrick UNSPECIFIED UNSPECIFIED UNSPECIFIED Druege, Uwe UNSPECIFIED UNSPECIFIED UNSPECIFIED Hause, Bettina UNSPECIFIED UNSPECIFIED UNSPECIFIED Bucher, Marcel UNSPECIFIED UNSPECIFIED UNSPECIFIED Kretzschmar, Tobias UNSPECIFIED UNSPECIFIED UNSPECIFIED Bossolini, Eligio UNSPECIFIED UNSPECIFIED UNSPECIFIED Kuhlemeier, Cris UNSPECIFIED UNSPECIFIED UNSPECIFIED Martinoia, Enrico UNSPECIFIED UNSPECIFIED UNSPECIFIED Franken, Philipp UNSPECIFIED UNSPECIFIED UNSPECIFIED Scholz, Uwe UNSPECIFIED orcid.org/0000-0001-6113-3518 UNSPECIFIED Reinhardt, Didier UNSPECIFIED orcid.org/0000-0003-3495-6783 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-492008
DOI:	10.1111/j.1365-313X.2010.04385.x
Journal or Publication Title:	Plant J.
Volume:	64
Number:	6
Page Range:	S. 1002 - 1018
Date:	2010
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1365-313X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MEDICAGO-TRUNCATULA ROOTS; CAROTENOID METABOLISM; EXPRESSION PATTERNS; PHOSPHORUS STRESS; TRANSPORTER GENE; PLANT-RESPONSES; FUNGI; ARABIDOPSIS; SYMBIOSIS; PATHWAY Multiple languages Plant Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/49200