Journal Article

FZJ-2021-01209

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Pod indehiscence in common bean is associated with the fine regulation of PvMYB26

Di Vittori, V.Extern* ; Bitocchi, E. ; Rodriguez, M. ; Alseekh, S. ; Bellucci, E. ; Nanni, L. ; Gioia, T. ; Marzario, S. ; Logozzo, G. ; Rossato, M. ; De Quattro, C. ; Murgia, M. L. ; Ferreira, J. J. ; Campa, A. ; Xu, C. ; Fiorani, F.FZJ* ; Sampathkumar, A. ; Fröhlich, A. ; Attene, G. ; Delledonne, M. ; Usadel, B.FZJ* ; Fernie, A. R. ; Rau, D. ; Papa, R. (Corresponding author)

2021
Oxford Univ. Press Oxford

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Please use a persistent id in citations: http://hdl.handle.net/2128/27267  doi:10.1093/jxb/eraa553

Abstract: In legumes, pod shattering occurs when mature pods dehisce along the sutures, and detachment of the valves promotes seed dispersal. In Phaseolus vulgaris (L)., the major locus qPD5.1-Pv for pod indehiscence was identified recently. We developed a BC4/F4 introgression line population and narrowed the major locus down to a 22.5 kb region. Here, gene expression and a parallel histological analysis of dehiscent and indehiscent pods identified an AtMYB26 orthologue as the best candidate for loss of pod shattering, on a genomic region ~11 kb downstream of the highest associated peak. Based on mapping and expression data, we propose early and fine up-regulation of PvMYB26 in dehiscent pods. Detailed histological analysis establishes that pod indehiscence is associated with the lack of a functional abscission layer in the ventral sheath, and that the key anatomical modifications associated with pod shattering in common bean occur early during pod development. We finally propose that loss of pod shattering in legumes resulted from histological convergent evolution and that it is the result of selection at orthologous loci.In legumes, pod shattering occurs when mature pods dehisce along the sutures, and detachment of the valves promotes seed dispersal. In Phaseolus vulgaris (L)., the major locus qPD5.1-Pv for pod indehiscence was identified recently. We developed a BC4/F4 introgression line population and narrowed the major locus down to a 22.5 kb region. Here, gene expression and a parallel histological analysis of dehiscent and indehiscent pods identified an AtMYB26 orthologue as the best candidate for loss of pod shattering, on a genomic region ~11 kb downstream of the highest associated peak. Based on mapping and expression data, we propose early and fine up-regulation of PvMYB26 in dehiscent pods. Detailed histological analysis establishes that pod indehiscence is associated with the lack of a functional abscission layer in the ventral sheath, and that the key anatomical modifications associated with pod shattering in common bean occur early during pod development. We finally propose that loss of pod shattering in legumes resulted from histological convergent evolution and that it is the result of selection at orthologous loci.

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Contributing Institute(s):

1. Bioinformatik (IBG-4)
2. Pflanzenwissenschaften (IBG-2)

Research Program(s):

1. 217 - Für eine nachhaltige Bio-Ökonomie – von Ressourcen zu Produkten (POF4-217) (POF4-217)

Appears in the scientific report 2021

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Database coverage:
; ; ; BIOSIS Previews ; Biological Abstracts ; Clarivate Analytics Master Journal List ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Life Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; National-Konsortium ; Nationallizenz ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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