Lettuce seed pelleting with Pseudomonas sp. 31-12: plant growth promotion under laboratory and greenhouse conditions.

Autor: Kangsopa J; Maejo University, Chiang Mai 50290, Thailand., Hynes RK; Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK, Canada., Siri B; Department of Plant Science and Agricultural Resources, Faculty of Agriculture, KhonKaen University, Khon Kaen 40002, Thailand.
Jazyk: angličtina
Zdroj: Canadian journal of microbiology [Can J Microbiol] 2024 Dec 01; Vol. 70 (12), pp. 529-537. Date of Electronic Publication: 2024 Aug 08.
DOI: 10.1139/cjm-2024-0071
Abstrakt: Plant growth promotion by Pseudomonas sp. 31-12 incorporated into a lettuce seed pelleting matrix was studied. We examined (1) the effect of five rhizosphere derived bacterial strains on green oak lettuce ( Lactuca sativa L.) seed germination, root and shoot growth, as a strain selection step for seed coating and seed pelletizing studies, (2) population stability of Pseudomonas sp. 31-12 incorporated into a pelleting matrix on lettuce seed stored three months at 4 °C, and (3) lettuce growth promotion in the laboratory and greenhouse by Pseudomonas sp. 31-12 coated and pelletized seed. A spontaneous streptomycin mutant of Pseudomonas sp. 31-12 (str) was used to determine population size on seed and roots of 15- and 30-day-old lettuce. The population of Pseudomonas sp. 31-12str on coated and pelleted seed decreased from 10 4 cfu/seed to 10 3 cfu/seed after 3 months storage at 4 °C. However, the population exceeded 10 4 cfu/g root dry mass and 10 5 /g root dry mass after 15 days and 30 days in the greenhouse. Leaf fresh mass was significantly increased ( P  ≤ 0.05) with Pseudomonas sp. 31-12 seed treatment as compared to noninoculated seed. In conclusion, pelletized lettuce seed with Pseudomonas sp. 31-12 promoted growth and yield in the greenhouse.
Competing Interests: The authors state that they have no conflicts of interest related to this work.
Databáze: MEDLINE
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