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Descripción
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| Lupinus mariae-josephi is a recently described species (Pascual 2004) able to grow in soils with high pH and active lime content in the Valencia province (Spain). L. mariae-josephi endosymbionts are extremely slow-growing bacteria with genetic and symbiotic characteristics that differentiate them from Bradyrhizobium strains nodulating Lupinus spp. native of the Iberian Peninsula and adapted to grow in acid soils. Cross-inoculation experiments revealed that all the endosymbiotic isolates from L. mariae-josephi tested are legume-host selective and are unable to nodulate species such as L. angustifolius, and L. luteus. In contrast, Bradyrhizobium strains from Lupinus spp. tested were able to nodulate L. mariae-josephi, although the nodules fixed nitrogen inefficiently. Phylogenetic analysis was performed with housekeeping genes (rrn, glnII, recA, atpD) and nodulation gene nodC. Housekeeping gene phylogeny revealed that L. mariae-josephi rhizobia form a strongly supported monophyletic group within Bradyrhizobium genus. This cluster also includes B. jicamae and certain strains of B. elkanii. Contrarily, isolates from other Lupinus spp. native of the Iberian Peninsula were grouped mainly within B. canariense and two B. japonicum lineages. Phylogenetic analysis of L. mariae-josephi isolates based on the nodC symbiotic gene defined a solid clade close to isolates from Algerian Retama spp. and to fast-growing rhizobia. | |
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Internacional
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Si |
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DOI
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Edición del Libro
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Editorial del Libro
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B.Naganowska, P. Kachlicki and B. Wolko (Eds) International Lupin Association, Canterbury, New Zealand. |
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ISBN
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978-83-61607-73-1 |
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Serie
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Título del Libro
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Proceeding of the 13th International Lupin Conference In Lupin crops ? an opportunity for today, a promise for the future |
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Desde página
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243 |
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Hasta página
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249 |