Control of sporophyte secondary cell wall development in Marchantia by a Class II KNOX gene.

Autor:	Dierschke T; School of Biological Sciences, Monash University, Clayton, Melbourne, VIC 3800, Australia; ARC Centre of Excellence for Plant Success in Nature and Agriculture, Monash University, Clayton, Melbourne, VIC 3800, Australia; Institute of Plant Biology and Zürich-Basel Plant Science Centre, University of Zurich, 8008 Zurich, Switzerland., Levins J; School of Biological Sciences, Monash University, Clayton, Melbourne, VIC 3800, Australia., Lampugnani ER; School of BioSciences, University of Melbourne, Parkville, VIC 3010, Australia; Menzies Institute for Medical Research, College of Health and Medicine, University of Tasmania, Hobart, TAS 7001, Australia., Ebert B; School of BioSciences, University of Melbourne, Parkville, VIC 3010, Australia; School of Biology and Biotechnology, Ruhr University Bochum, 44801 Bochum, Germany., Zachgo S; Division of Botany, Osnabrueck University, 49076 Osnabrück, Germany., Bowman JL; School of Biological Sciences, Monash University, Clayton, Melbourne, VIC 3800, Australia; ARC Centre of Excellence for Plant Success in Nature and Agriculture, Monash University, Clayton, Melbourne, VIC 3800, Australia. Electronic address: john.bowman@monash.edu.
Jazyk:	angličtina
Zdroj:	Current biology : CB [Curr Biol] 2024 Nov 18; Vol. 34 (22), pp. 5213-5222.e5. Date of Electronic Publication: 2024 Oct 23.
DOI:	10.1016/j.cub.2024.09.061
Abstrakt:	Land plants evolved from an ancestral alga around 470 mya, evolving complex multicellularity in both haploid gametophyte and diploid sporophyte generations. The evolution of water-conducting tissues in the sporophyte generation was crucial for the success of land plants, paving the way for the colonization of a variety of terrestrial habitats. Class II KNOX (KNOX2) genes are major regulators of secondary cell wall formation and seed mucilage (pectin) deposition in flowering plants. Here, we show that, in the liverwort Marchantia polymorpha, loss-of-function alleles of the KNOX2 ortholog, MpKNOX2, or its dimerization partner, MpBELL1, have defects in capsule wall secondary cell wall and spore pectin biosynthesis. Both genes are expressed in the gametophytic calyptra surrounding the sporophyte and exert maternal effects, suggesting intergenerational regulation from the maternal gametophyte to the sporophytic embryo. These findings also suggest the presence of a secondary wall genetic program in the non-vascular liverwort capsule wall, with attributes of secondary walls in vascular tissues. Competing Interests: Declaration of interests The authors declare no competing interests. (Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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