Endophytic Seed-Associated Bacteria as Plant Growth Promoters of Cuban Rice ( L.).

Microorganisms

Laboratorio de Silvicultura, Departamento de Ciencias Forestales, Facultad de Ciencias Agropecuarias y Medioambiente, Universidad de La Frontera, Temuco 4811230, Chile.

Published: September 2023

AI Article Synopsis

  • Cuban rice cultivars INCA LP-5 and INCA LP-7 were studied for their seed-associated endophytic bacteria, which had not been previously reported.
  • A total of nineteen bacterial strains were isolated from the seeds, with three strains (sp. S5-1, sp. S5-38, and sp. S7-1) showing strong potential to enhance plant growth due to their beneficial traits.
  • These promising strains could be developed into bio-stimulators or bio-inoculants to improve the growth of Cuban rice crops by enhancing various growth metrics after inoculation.

Article Abstract

Cuban rice cultivars INCA LP-5 and INCA LP-7 are widely distributed in Cuba and Caribbean countries. Although there are studies about rhizospheric bacteria associated with these cultivars, there are no reports about their seed-associated bacteria. This study aimed to isolate endophytic bacteria from rice seeds and select those with the greatest plant growth-promoting traits. A total of nineteen bacterial strains from the genera , , , and were isolated from the husk and endosperm of rice seeds. The strains sp. S5-1, sp. S5-38, and sp. S7-1 were classified as the most promissory to increase rice growth as they demonstrated the presence of multiple plant growth-promoting traits such as the production of auxins, phosphate, and potassium solubilization, the production of siderophores, and the inhibition of the phytopathogen . The inoculation of strains of sp. and spp. in rice improves the height, root length, fresh weight, and dry weight of the shoot and root after 21 days post-inoculation in hydroponic assays. This study constitutes the first report on Cuban rice cultivars about the presence of endophytes in seeds and their potential to promote seedling growth. sp. S5-1, sp. S5-38, and sp. S7-1 were selected as the more promising strains for the development of bio-stimulators or bio-inoculants for Cuban rice crops.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10537011PMC
http://dx.doi.org/10.3390/microorganisms11092317DOI Listing

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