Bioinput Inoculation in Common Beans to Mitigate Stresses Caused by a Period of Drought
Author:
Arruda Bruna1ORCID, Bejarano-Herrera Wilfrand Ferney2ORCID, Ortega-Cepeda Maria Camila2, Campo-Quesada Jose Manuel2, Toro-Tobón Gabriela3, Estrada-Bonilla German Andres3ORCID, Silva Antonio Marcos Miranda4ORCID, Ferrari Putti Fernando1ORCID
Affiliation:
1. Biosystems Engineering Department, Faculty of Science and Engineering, Tupã Campus, São Paulo State University (UNESP), Tupã 17602-496, São Paulo, Brazil 2. Colombian Corporation for Agricultural Research (AGROSAVIA), Obonuco 520038, Nariño, Colombia 3. Colombian Corporation for Agricultural Research (AGROSAVIA), Tibaitatá 250047, Cundinamarca, Colombia 4. Soil Science Department, “Luiz de Queiroz” College of Agriculture (Esalq), University of São Paulo (USP), Piracicaba 13418-900, São Paulo, Brazil
Abstract
Drought conditions have made it difficult for farmers to ensure the productivity of their crops. The objective of this study was to evaluate the potential of bioinputs in stress mitigation after a drought event in common beans. Two experiments were set up in a greenhouse. Firstly, two types of soils (clayey and sandy loam) were used. After seedling emergence, treatments were set: no bacteria inoculation (NB) and inoculation with Herbaspirillum frisingense AP21. Then, a differentiation on the irrigation (15 days) was performed with no water restriction (NWR) and with water restriction (WWR). Transpiration, stomatal conductance, leaf dry matter and proline were measured. Secondly, in the clayey soil, the bacteria treatments were NB, Herbaspirillum frisingense AP21, Rhizobium leguminosarum T88 and co-inoculation (AP21 + T88). A differentiation on the irrigation (15 days) was performed: NWR and WWR. Then, Fv/Fm, photosynthetic rate, proline and sugars were assessed, and the harvest occurred 97 days after emergence. For sandy loam soil bioinputs, they did not have an effect on the parameters evaluated. For clayey soil, H. frisingense AP21 increased the transpiration rate and stomatal conductance and hence improved the leaf dry matter in comparison to NB. Under WWR, the isolated inoculations of AP21 and T88 increased grain dry matter, but the co-inoculation showed low grain production, similar to no bacteria inoculation.
Funder
Science, Technology, and Innovation Fund of the Colombian general royalties’ system National Council for Scientific and Technological Development São Paulo State University
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