Universität zu Köln

Ramirez, Vicente ORCID: 0000-0001-9786-497X and Pauly, Markus ORCID: 0000-0002-3116-2198 (2019). Genetic dissection of cell wall defects and the strigolactone pathway in Arabidopsis. Plant Direct, 3 (6). CHICHESTER: JOHN WILEY & SONS LTD. ISSN 2475-4455

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Abstract

Defects in the biosynthesis and/or deposition of secondary plant cell wall polymers result in the collapse of xylem vessels causing a dwarfed plant stature and an altered plant architecture termed irregular xylem (irx) syndrome. For example, reduced xylan O-acetylation causes strong developmental defects and increased freezing tolerance. Recently, we demonstrated that the irx syndrome in the trichome birefringence-like 29/eskimo1 (tbl29/esk1) mutant is dependent on MORE AXILLARY GROWTH 4 (MAX4), a key enzyme in the biosynthesis of the phytohormone strigolactone (SL). In this report, we show that other xylan- and cellulose-deficient secondary wall mutants exhibit increased freezing tolerance correlated with the irx syndrome. In addition, these phenotypes are also dependent on MAX4, suggesting a more general interaction between secondary wall defects and SL biosynthesis. In contrast, MAX4 does not play a role in developmental defects triggered by primary wall deficiencies, suggesting that the interaction is restricted to vascular tissue. Through a reverse genetics approach, the requirement of different components of the SL pathway impacting the irx syndrome in tbl29 was evaluated. Our results show that the tbl29-associated irx phenotypes are dependent on the MAX3 and MAX4 enzymes, involved in the early steps of SL biosynthesis. In contrast, this signaling is independent on downstream enzymes in the biosynthesis and perception of SL such as MAX1 and MAX2.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ramirez, Vicente UNSPECIFIED orcid.org/0000-0001-9786-497X UNSPECIFIED Pauly, Markus UNSPECIFIED orcid.org/0000-0002-3116-2198 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-138272
DOI:	10.1002/pld3.149
Journal or Publication Title:	Plant Direct
Volume:	3
Number:	6
Date:	2019
Publisher:	JOHN WILEY & SONS LTD
Place of Publication:	CHICHESTER
ISSN:	2475-4455
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CARLACTONE; FAMILY; DEFICIENT; MUTANTS; IRREGULAR-XYLEM9; TOLERANCE; REPRESSOR; OUTGROWTH; RESPONSES; KARRIKINS Multiple languages Plant Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13827