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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
30/08/2024 |
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Data da última atualização: |
30/08/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CASAES, P. A.; SANTOS, J. M. F. dos; SILVA, v. c.; RHEM, M. F. K.; COTA, M. M. T.; FARIA, S. M. de; RANDO, J. G.; JAMES, E. K.; GROSS, E. |
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Afiliação: |
PATRICIA ALVES CASAES, UNIVERSIDADE ESTADUAL DE SANTA CRUZ; JOSÉ MIGUEL FERREIRA DOS SANTOS, FACULDADE PITÁGORAS DE MEDICINA; VERÔNICA CORDEIRO SILVA, UNIVERSIDADE ESTADUAL DE SANTA CRUZ; MARIANA FERREIRA KRUSCHEWSKY RHEM, UNIVERSIDADE ESTADUAL DE SANTA CRUZ; MATHEUS MARTINS TEIXEIRA COTA, UNIVERSIDADE ESTADUAL DE FEIRA DE SANTANA; SERGIO MIANA DE FARIA, CNPAB; JULIANA GASTALDELLO RANDO, UNIVERSIDADE FEDERAL DO OESTE DA BAHIA; EUAN K JAMES, THE JAMES HUTTON INSTITUTE; EDUARDO GROSS, UNIVERSIDADE ESTADUAL DE SANTA CRUZ. |
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Título: |
The radiation of nodulated Chamaecrista species from the rainforest into more diverse habitats has been accompanied by a reduction in growth form and a shift from fixation threads to symbiosomes; |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Journal of Experimental Botany, v. 75, n. 11 p. 3643–3662, 2024. |
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ISSN: |
1460-2431 |
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DOI: |
https://doi.org/10.1093/jxb/erae134 |
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Idioma: |
Inglês |
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Conteúdo: |
All non-Mimosoid nodulated genera in the legume subfamily Caesalpinioideae confine their rhizobial symbionts within cell wall-bound ‘fixation threads’ (FTs). The exception is the large genus Chamaecrista in which shrubs and subshrubs house their rhizobial bacteroids more intimately within symbiosomes, whereas large trees have FTs. This study aimed to unravel the evolutionary relationships between Chamaecrista growth habit, habitat, nodule bacteroid type, and rhizobial genotype. The growth habit, bacteroid anatomy, and rhizobial symbionts of 30 nodulated Chamaecrista species native to different biomes in the Brazilian state of Bahia, a major centre of diversity for the genus, was plotted onto an ITS-trnL-F-derived phylogeny of Chamaecrista. The bacteroids from most of the Chamaecrista species examined were enclosed in symbiosomes (SYM-type nodules), but those in arborescent species in the section Apoucouita, at the base of the genus, were enclosed in cell wall material containing homogalacturonan (HG) and cellulose (FT-type nodules). Most symbionts were Bradyrhizobium genotypes grouped according to the growth habits of their hosts, but the tree, C. eitenorum, was nodulated by Paraburkholderia. Chamaecrista has a range of growth habits that allow it to occupy several different biomes and to co-evolve with a wide range of (mainly) bradyrhizobial symbionts. FTs represent a less intimate symbiosis linked with nodulation losses, so the evolution of SYM-type nodules by most Chamaecrista species may have (i) aided the genus-wide retention of nodulation, and (ii) assisted in its rapid specia tion and radiation out of the rainforest into more diverse and challenging habitats. MenosAll non-Mimosoid nodulated genera in the legume subfamily Caesalpinioideae confine their rhizobial symbionts within cell wall-bound ‘fixation threads’ (FTs). The exception is the large genus Chamaecrista in which shrubs and subshrubs house their rhizobial bacteroids more intimately within symbiosomes, whereas large trees have FTs. This study aimed to unravel the evolutionary relationships between Chamaecrista growth habit, habitat, nodule bacteroid type, and rhizobial genotype. The growth habit, bacteroid anatomy, and rhizobial symbionts of 30 nodulated Chamaecrista species native to different biomes in the Brazilian state of Bahia, a major centre of diversity for the genus, was plotted onto an ITS-trnL-F-derived phylogeny of Chamaecrista. The bacteroids from most of the Chamaecrista species examined were enclosed in symbiosomes (SYM-type nodules), but those in arborescent species in the section Apoucouita, at the base of the genus, were enclosed in cell wall material containing homogalacturonan (HG) and cellulose (FT-type nodules). Most symbionts were Bradyrhizobium genotypes grouped according to the growth habits of their hosts, but the tree, C. eitenorum, was nodulated by Paraburkholderia. Chamaecrista has a range of growth habits that allow it to occupy several different biomes and to co-evolve with a wide range of (mainly) bradyrhizobial symbionts. FTs represent a less intimate symbiosis linked with nodulation losses, so the evolution of SYM-type nodules by most Chamaec... Mostrar Tudo |
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Palavras-Chave: |
Fixation thread. |
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Thesaurus Nal: |
Bradyrhizobium; Caesalpinioideae; Cellulose; Chamaecrista. |
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Categoria do assunto: |
S Ciências Biológicas |
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Marc: |
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Embrapa Agrobiologia (CNPAB) |
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