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Molecular characterization of nitrogen fixing microsymbionts from root nodules of Vachellia (Acacia) jacquemontii, a native legume from the Thar Desert of India

Aims To describe the structure of nodules of Vachellia (Acacia ) jacquemontii, and to characterise the rhizobia that occupy them. Methods Light and electron microscopy were used to analyse nodules. Rhizobia were characterised using their 16S rRNA, housekeeping and symbiosis-related gene sequences. R... Full description

Journal Title: Plant and soil 2017, Vol.410 (1/2), p.21-40
Main Author: Sankhla, Indu Singh
Other Authors: Tak, Nisha , Meghwal, Raju Ram , Choudhary, Sunil , Tak, Alkesh , Rathi, Sonam , Sprent, Janet I , James, Euan K , Gehlot, Hukam Singh
Format: Electronic Article Electronic Article
Language: English
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Publisher: Cham: Springer
ID: ISSN: 0032-079X
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title: Molecular characterization of nitrogen fixing microsymbionts from root nodules of Vachellia (Acacia) jacquemontii, a native legume from the Thar Desert of India
format: Article
creator:
  • Sankhla, Indu Singh
  • Tak, Nisha
  • Meghwal, Raju Ram
  • Choudhary, Sunil
  • Tak, Alkesh
  • Rathi, Sonam
  • Sprent, Janet I
  • James, Euan K
  • Gehlot, Hukam Singh
subjects:
  • Acacia
  • Bacteria
  • Bacteria, Nitrifying
  • Beans
  • Biomedical and Life Sciences
  • Deserts
  • Diseases and pests
  • Ecology
  • Health aspects
  • Legumes
  • Life Sciences
  • Microscopy
  • Mimosa
  • Mimosaceae
  • Mimoseae
  • Nitrogen
  • Phylogenetics
  • Plant Physiology
  • Plant Sciences
  • Prosopis
  • Regular Article
  • Soil Science & Conservation
  • Symbiosis
ispartof: Plant and soil, 2017, Vol.410 (1/2), p.21-40
description: Aims To describe the structure of nodules of Vachellia (Acacia ) jacquemontii, and to characterise the rhizobia that occupy them. Methods Light and electron microscopy were used to analyse nodules. Rhizobia were characterised using their 16S rRNA, housekeeping and symbiosis-related gene sequences. Results Nodules of V. jacquemontii were typical of all other described mimosoid legumes. All 73 of the isolates were strains of Ensifer, and concatenated phylogenetic analysis of their housekeeping genes (rrs, recA, atpD, glnII and dnaK) suggested that they are novel, forming separate lineages close to E. saheli. The phytogenies of the symbiosis-essential genes nodA and nifH were inconsistent with the housekeeping phylogenies. The nodA sequences of most isolates were close to that of E. arboris HAMBI 1552T, but the nifH gene was found to be related to that of E. kostiensis HAMBI 1489T. All the tested Ensifer strains, except for AJ24, were found to be capable of nodulating other species of Vachellia as well as native Indian Mimosa and Prosopis spp. Conclusions Stressful conditions caused by the alkaline soil of the Thar Desert have resulted in V. jacquemontii being nodulated by diverse and promiscuous Ensifer species that are capable of nodulating other native members of the tribe Mimoseae.
language: eng
source:
identifier: ISSN: 0032-079X
fulltext: no_fulltext
issn:
  • 0032-079X
  • 1573-5036
url: Link


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titleMolecular characterization of nitrogen fixing microsymbionts from root nodules of Vachellia (Acacia) jacquemontii, a native legume from the Thar Desert of India
creatorSankhla, Indu Singh ; Tak, Nisha ; Meghwal, Raju Ram ; Choudhary, Sunil ; Tak, Alkesh ; Rathi, Sonam ; Sprent, Janet I ; James, Euan K ; Gehlot, Hukam Singh
creatorcontribSankhla, Indu Singh ; Tak, Nisha ; Meghwal, Raju Ram ; Choudhary, Sunil ; Tak, Alkesh ; Rathi, Sonam ; Sprent, Janet I ; James, Euan K ; Gehlot, Hukam Singh
descriptionAims To describe the structure of nodules of Vachellia (Acacia ) jacquemontii, and to characterise the rhizobia that occupy them. Methods Light and electron microscopy were used to analyse nodules. Rhizobia were characterised using their 16S rRNA, housekeeping and symbiosis-related gene sequences. Results Nodules of V. jacquemontii were typical of all other described mimosoid legumes. All 73 of the isolates were strains of Ensifer, and concatenated phylogenetic analysis of their housekeeping genes (rrs, recA, atpD, glnII and dnaK) suggested that they are novel, forming separate lineages close to E. saheli. The phytogenies of the symbiosis-essential genes nodA and nifH were inconsistent with the housekeeping phylogenies. The nodA sequences of most isolates were close to that of E. arboris HAMBI 1552T, but the nifH gene was found to be related to that of E. kostiensis HAMBI 1489T. All the tested Ensifer strains, except for AJ24, were found to be capable of nodulating other species of Vachellia as well as native Indian Mimosa and Prosopis spp. Conclusions Stressful conditions caused by the alkaline soil of the Thar Desert have resulted in V. jacquemontii being nodulated by diverse and promiscuous Ensifer species that are capable of nodulating other native members of the tribe Mimoseae.
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subjectAcacia ; Bacteria ; Bacteria, Nitrifying ; Beans ; Biomedical and Life Sciences ; Deserts ; Diseases and pests ; Ecology ; Health aspects ; Legumes ; Life Sciences ; Microscopy ; Mimosa ; Mimosaceae ; Mimoseae ; Nitrogen ; Phylogenetics ; Plant Physiology ; Plant Sciences ; Prosopis ; Regular Article ; Soil Science & Conservation ; Symbiosis
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descriptionAims To describe the structure of nodules of Vachellia (Acacia ) jacquemontii, and to characterise the rhizobia that occupy them. Methods Light and electron microscopy were used to analyse nodules. Rhizobia were characterised using their 16S rRNA, housekeeping and symbiosis-related gene sequences. Results Nodules of V. jacquemontii were typical of all other described mimosoid legumes. All 73 of the isolates were strains of Ensifer, and concatenated phylogenetic analysis of their housekeeping genes (rrs, recA, atpD, glnII and dnaK) suggested that they are novel, forming separate lineages close to E. saheli. The phytogenies of the symbiosis-essential genes nodA and nifH were inconsistent with the housekeeping phylogenies. The nodA sequences of most isolates were close to that of E. arboris HAMBI 1552T, but the nifH gene was found to be related to that of E. kostiensis HAMBI 1489T. All the tested Ensifer strains, except for AJ24, were found to be capable of nodulating other species of Vachellia as well as native Indian Mimosa and Prosopis spp. Conclusions Stressful conditions caused by the alkaline soil of the Thar Desert have resulted in V. jacquemontii being nodulated by diverse and promiscuous Ensifer species that are capable of nodulating other native members of the tribe Mimoseae.
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1Bacteria
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4Biomedical and Life Sciences
5Deserts
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7Ecology
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titleMolecular characterization of nitrogen fixing microsymbionts from root nodules of Vachellia (Acacia) jacquemontii, a native legume from the Thar Desert of India
authorSankhla, Indu Singh ; Tak, Nisha ; Meghwal, Raju Ram ; Choudhary, Sunil ; Tak, Alkesh ; Rathi, Sonam ; Sprent, Janet I ; James, Euan K ; Gehlot, Hukam Singh
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7Ecology
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atitleMolecular characterization of nitrogen fixing microsymbionts from root nodules of Vachellia (Acacia) jacquemontii, a native legume from the Thar Desert of India
jtitlePlant and soil
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date2017-01-01
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abstractAims To describe the structure of nodules of Vachellia (Acacia ) jacquemontii, and to characterise the rhizobia that occupy them. Methods Light and electron microscopy were used to analyse nodules. Rhizobia were characterised using their 16S rRNA, housekeeping and symbiosis-related gene sequences. Results Nodules of V. jacquemontii were typical of all other described mimosoid legumes. All 73 of the isolates were strains of Ensifer, and concatenated phylogenetic analysis of their housekeeping genes (rrs, recA, atpD, glnII and dnaK) suggested that they are novel, forming separate lineages close to E. saheli. The phytogenies of the symbiosis-essential genes nodA and nifH were inconsistent with the housekeeping phylogenies. The nodA sequences of most isolates were close to that of E. arboris HAMBI 1552T, but the nifH gene was found to be related to that of E. kostiensis HAMBI 1489T. All the tested Ensifer strains, except for AJ24, were found to be capable of nodulating other species of Vachellia as well as native Indian Mimosa and Prosopis spp. Conclusions Stressful conditions caused by the alkaline soil of the Thar Desert have resulted in V. jacquemontii being nodulated by diverse and promiscuous Ensifer species that are capable of nodulating other native members of the tribe Mimoseae.
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doi10.1007/s11104-016-2838-9