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  Pod indehiscence in common bean is associated to the fine regulation of PvMYB26

Di Vittori, V., Bitocchi, E., Rodriguez, M., Alseekh, S., Bellucci, E., Nanni, L., et al. (2020). Pod indehiscence in common bean is associated to the fine regulation of PvMYB26. Journal of Experimental Botany, 72(5), 1617-1633. doi:10.1093/jxb/eraa553.

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Di Vittori, V.1, Author              
Bitocchi, Elena2, Author
Rodriguez, Monica2, Author
Alseekh, S.3, Author              
Bellucci, Elisa2, Author
Nanni, Laura2, Author
Gioia, Tania2, Author
Marzario, Stefania2, Author
Logozzo, Giuseppina2, Author
Rossato, Marzia2, Author
De Quattro, Concetta2, Author
Murgia, Maria L2, Author
Ferreira, Juan José2, Author
Campa, Ana2, Author
Xu, Chunming2, Author
Fiorani, Fabio2, Author
Sampathkumar, A.4, Author              
Fröhlich, A.4, Author              
Attene, Giovanna2, Author
Delledonne, Massimo2, Author
Usadel, Björn2, AuthorFernie, A. R.1, Author              Rau, Domenico2, AuthorPapa, Roberto2, Author more..
Affiliations:
1Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              
2External Organizations, ou_persistent22              
3The Genetics of Crop Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_3244836              
4Plant Cell Biology and Microscopy, Infrastructure Groups and Service Units, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_2253647              

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 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 to 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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Language(s): eng - English
 Dates: 2020-11
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.1093/jxb/eraa553
BibTex Citekey: 10.1093/jxb/eraa553
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Title: Journal of Experimental Botany
  Other : J. Exp. Bot
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press [etc.]
Pages: - Volume / Issue: 72 (5) Sequence Number: - Start / End Page: 1617 - 1633 Identifier: ISSN: 0022-0957
CoNE: https://pure.mpg.de/cone/journals/resource/954925413883