Microalga added to Bradyrhizobium inoculant improve soybean tolerance to salt stress.

Autor: Palma, Maracelia Salvadori, Mógor, Átila Francisco, Mógor, Gilda, de Oliveira Amatussi, Juliana, Michelon, Thomas Bruno, Panobianco, Maristela
Zdroj: Journal of Applied Phycology; Oct2022, Vol. 34 Issue 5, p2489-2505, 17p
Abstrakt: Addressing the growing challenges for food production imposed by abiotic stresses, the aim of this work was evaluate the effect and determine the ideal dose of the green microalga Asterarcys quadricellulare (CCAP 294/1) biomass added to Bradyrhizobium inoculant to mitigate the harmful effects of salinity in soybean. For that, two experiments were conducted: i) with soybean seeds testing salinity levels (40, 60 and 80 mmol L−1 of NaCl) and microalgal biomass doses (1.0; 1.5; 2.0 and 2.5 mg L−1) added to commercial soybean inoculant, evaluating germination and seedlings shoot and root length; ii) in greenhouse, testing the biomass doses of 1.5 and 2.5 mg L−1 and salinities of 60 and 80 mmol L−1 of NaCl in two soybean cultivars at early growth stages, evaluating biometric, biochemical and enzymatic variables. The germination and development of soybean seedlings were affected by salinity from 60 mmol L−1 of NaCl and the use of algal biomass at doses of 1.5 and 2.5 mg L−1 reduced the harmful effect of salinity. The microalga biomass added to inoculant was effective keeping plants growth, with the contents of total free amino acids, proline, proteins and antioxidant enzymes activity increased, as well roots nodules volume improved. Therefore, the use of A. quadricellulare (CCAP 294/1) biomass in soybean seeds was considered efficient to mitigate the salinity effects. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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