Affiliation:
1. Faculty of Biological Sciences, Juarez University of the State of Durango, Gómez Palacio 35010, Mexico
2. Regional Universitary Unit on Arid Lands, Autonomous University of Chapingo, Bermejillo 35230, Mexico
Abstract
Pecan cultivation holds significant global importance. Salinity negatively affects the physiology and metabolism of the plant. However, certain plant growth-promoting rhizobacteria (PGPR) have the ability to reduce salt stress in plants. The objective was to analyze the effects of the rhizobacteria Bacillus paralicheniformis strain LBEndo1 on the development of pecan seedlings under salinity stress conditions. Two factors were analyzed: the presence of saline stress and the bacterial inoculation. The bacterial application was conducted at a concentration of 1 × 108 CFU/mL, and irrigation was administered every third day with 80 mL of water containing 50 mM NaCl. The results show that the rhizobacteria has a maximum tolerance of 15% salinity. Furthermore, the inoculation of PGPR significantly increased the biomass of the seedlings, including the dry weight of leaves, stem, and roots, as well as the stem diameter and height. Furthermore, seedlings that interacted with the rhizobacteria exhibited superior development under saline conditions, with significant increases of 105.5% in chlorophyll concentration and 112% in proline accumulation compared to non-inoculated seedlings. Additionally, a remarkable reduction in leaf damage caused by salt stress was observed. In conclusion, the LBEndo1 rhizobacteria, being a strain resistant to salinity and possessing multiple mechanisms to promote growth while mitigating salt stress, has the potential to be utilized in pecan seedlings to alleviate stress caused by salinity and increases biomass.
Funder
Consejo Nacional de Humanidades, Ciencias y Tecnologías
Subject
Agronomy and Crop Science
Reference51 articles.
1. Evaluation of genetic diversity of pecan nut [Carya illinoensis (Wang) K. Koch.] in Jammu region;Rani;Indian J. Hortic.,2017
2. Molecular markers in Carya illinoinensis (Juglandaceae): From genetic characterization to molecular breeding;Poletto;J. Hortic. Sci. Biotechnol.,2021
3. Sierra-Zurita, D., Santana-Espinoza, S., Rosales-Serna, R., Ríos-Saucedo, J.C., and Carrillo-Parra, A. (2023). Productivity and Characterization of Biomass Obtained from Pruning of Walnut Orchards in México. Energies, 16.
4. Propagation of Pecan (Carya illinoensis): A review;Casales;Afr. J. Biotecnol.,2018
5. The ecology of pecan trees. 2. Climatic aspects of growing pecans;Wolstenholme;Pecan Q.,1979