Universität zu Köln

Bucher, Marcel ORCID: 0000-0003-1680-9413, Hause, Bettina, Krajinski, Franziska and Kuester, Helge (2014). Through the doors of perception to function in arbuscular mycorrhizal symbioses. New Phytol., 204 (4). S. 833 - 841. HOBOKEN: WILEY. ISSN 1469-8137

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Abstract

The formation of an arbuscular mycorrhizal (AM) symbiosis is initiated by the bidirectional exchange of diffusible molecules. While strigolactone hormones, secreted from plant roots, stimulate hyphal branching and fungal metabolism, fungal short-chain chitin oligomers as well as sulfated and nonsulfated lipochitooligosaccharides (s/nsMyc-LCOs) elicit pre-symbiosis responses in the host. Fungal LCO signals are structurally related to rhizobial Nod-factor LCOs. Genome-wide expression studies demonstrated that defined sets of genes were induced by Nod-, sMyc- and nsMyc-LCOs, indicating LCO-specific perception in the pre-symbiosis phase. During hyphopodium formation and the subsequent root colonization, cross-talk between plant roots and AM fungi also involves phytohormones. Notably, gibberellins control arbuscule formation via DELLA proteins, which themselves serve as positive regulators of arbuscule formation. The establishment of arbuscules is accompanied by a substantial transcriptional and post-transcriptional reprogramming of host roots, ultimately defining the unique protein composition of arbuscule-containing cells. Based on cellular expression profiles, key checkpoints of AM development as well as candidate genes encoding transcriptional regulators and regulatory microRNAs were identified. Detailed functional analyses of promoters specified short motifs sufficient for cell-autonomous gene regulation in cells harboring arbuscules, and suggested simultaneous, multi-level regulation of the mycorrhizal phosphate uptake pathway by integrating AM symbiosis and phosphate starvation response signaling. Featured paper: See also the Editorial by Hetherington

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bucher, Marcel UNSPECIFIED orcid.org/0000-0003-1680-9413 UNSPECIFIED Hause, Bettina UNSPECIFIED UNSPECIFIED UNSPECIFIED Krajinski, Franziska UNSPECIFIED UNSPECIFIED UNSPECIFIED Kuester, Helge UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-422762
DOI:	10.1111/nph.12862
Journal or Publication Title:	New Phytol.
Volume:	204
Number:	4
Page Range:	S. 833 - 841
Date:	2014
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1469-8137
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Biology > Botanical Institute
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MEDICAGO-TRUNCATULA ROOTS; GENE-EXPRESSION; NODULE DEVELOPMENT; STRIGOLACTONE BIOSYNTHESIS; PHOSPHATE TRANSPORTER; SIGNAL-TRANSDUCTION; LOTUS-JAPONICUS; CORTICAL-CELLS; CA2+ SPIKING; FUNGI Multiple languages Plant Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/42276