Biological nitrogen fixation of Biserrula pelecinus L. under water deficit

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The present work studied the effects of water deficiency conditions on the biological nitrogen fixation of three native rhizobia (SafPt12, SafPt6, and AjuPt16) isolated from Biserrula pelecinus L., and a reference strain Mesorhizobium ciceri biovar biserrulae. In terms of plant-water status, B. pelecinus showed typical signs of drought avoidance strategies such as reducing the aboveground development (i.e. reduction in leaf surface area and increase in root/shoot ratio) in detriment of a better developed root system. Dry-matter production and nitrogen content of the aboveground biomass decreased with the increasing levels of drought stress, as well as nodulation and symbiotic nitrogen fixation, for all the tested isolates. The parameters investigated suggested that SafPt12 was the most successful native rhizobia to withstand severe water conditions without compromising nitrogen fixation demands. … full description

Bibliographic Details

Other Authors

Vicente C. S. L., M. A. Pérez-Fernández, G. Pereira, M. M. Tavares-de-Sousa

Document Type

Articles

Physical Description

4 il.

Published in

Plant, Soil and Environment. -- ISSN 1214-1178. -- Roč. 58, č. 8 (2012), s. 360-366

Subjects

Rhizobium

sucho

stres ze sucha

biomasa

obsah sušiny

dusík

fixace dusíku

RHIZOBIUM

DROUGHT

DROUGHT STRESS

BIOMASS

DRY MATTER CONTENT

NITROGEN

NITROGEN FIXATION

Biserrula pelecinus > Mesorhizobium ciceri

Item Description

2 grafy, 2 tabulky

Bibliography

Bibliografie na s. 365-366