NDLI: Comparative symbiotic performance of native rhizobia of the Flooding Pampa and strains currently used for inoculating Lotus tenuis in this region

Content Provider	Springer Nature Link
Author	Sannazzaro, Analía Inés Bergottini, Verónica Mariel Paz, Rosalía Cristina Castag, Luis Nazare Menéndez, Ana Bernardina Ruiz, Oscar Adolfo Pieckenstain, Fernando Luis Estrella, María Julia
Copyright Year	2010
Abstract	The Flooding Pampa (FP) is the most important area for cattle breeding in Argentina. In this region, persistence and yield of typical forage legumes are strongly limited by soil salinity and alkalinity, which affect around 30% of the total area. Instead, naturalized Lotus tenuis is the main forage legume in this region. Rhizobial strains currently used for inoculating L. tenuis in the FP are exotic or native from non-saline soils of this region, their taxonomic identity being unknown. Assuming that rhizobia native from the most restrictive environments are well adapted to adverse conditions, the use of such isolates could improve the productivity of L. tenuis in the FP. Hence, the goal of this study was to evaluate the symbiotic efficiency of selected L. tenuis rhizobia native from the FP, as compared with strains currently used for field inoculation of this legume. Under non-stressing conditions, the symbiotic performance of native strains of FP exceeded those ones currently used for L. tenuis. Moreover, the symbiotic performance of the native strain ML103 was considerably high under salt stress, compared with strains currently used as inoculants. Analysis of 16S rRNA gene sequencing revealed that unclassified rhizobia currently used for field inoculation of L. tenuis and native strains grouped with the genus Mesorhizobium. As a whole, results obtained demonstrate that soils of the FP are a source of efficient and diverse rhizobia that could be used as a sustainable agronomic tool to formulate inoculants that improve forage yield of L. tenuis in this region.
Starting Page	371
Ending Page	379
Page Count	9
File Format	PDF
ISSN	00036072
Journal	Antonie van Leeuwenhoek
Volume Number	99
Issue Number	2
e-ISSN	15729699
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-09-02
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Symbiotic performance Lotus tenuis Soil salinity Rhizobia Medical Microbiology Soil Science & Conservation Plant Sciences Microbiology
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Biology Microbiology

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Comparative symbiotic performance of native rhizobia of the Flooding Pampa and strains currently used for inoculating Lotus tenuis in this region.

Increasing defoliation frequency constrains regrowth of the forage legume Lotus tenuis under flooding. The role of crown reserves

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