Cepa de Sinorhizobium meliloti halotolerante confiere tolerancia a la salinidad a Medicago sativa L

GONZALEZ, EVELYN AILEN; PACHECO INSAUSTI, MARÍA CECILIA; GONZALO ZAPICO, MARTÍN; MALENA, ACHIARY; PEDRANZANI, HILDA ELIZABETH

Avances en Investigación Agropecuaria

Jose Manuel Palma Garcia

Lugar: Mexico ; Año: 2023 vol. 27

0188-7890

Objective. To comprehensively evaluate the effect of salinity on CW 660 Medicago sativa L. plants subjected to two treatments: nitrogen fertilization and inoculation with a halotolerant strain of Sinorhizobium meliloti. Materials and methods. M. sativa L. plants were di-vided into two groups: fertilized with nitrogen but not inoculated with S. meliloti (FP) and inoculated with S. meliloti but not fertilized (IP). Salt stress was induced with Hoagland’s solution and NaCl (50, 100, and 200 mM) for FP, the same solution with limited nitrogen for IP. Response variables length (L), fresh weight (FW), and dry weight (DW) of roots and aerial parts, photosynthetic pigments (chlo-rophylls a and b and carotenoids), and proline concentration were measured after four weeks. Results. Generalized additive models (GAM) were used to evaluate the effect of salinity and inoculation on the response variables. The ino-culated plants showed significant improvements in aerial and radical length, and chlorophylls a and b under salinity stress compared to the fertilized plants FP. Proline concentration was decreased in IP. Nodulation decreased due to salt stress, but inoculation promoted active no-dules. Conclusion. Inoculation with halotole-rant S. meliloti improved salt stress resistance and growth in plant.