Hanifah Nurul Atilia Shafienaz Binti, Ghadamgahi Farideh, Ghosh Samrat, Ortiz Rodomiro, Whisson Stephen C, Vetukuri Ramesh R, Kalyandurg Pruthvi B
Department of Plant Breeding, Horticum, Swedish University of Agricultural Sciences, Lomma, Sweden.
Agrobiodiversity and Environment Research Centre, Malaysian Agricultural Research and Development Institute (MARDI), Serdang, Selangor, Malaysia.
Front Plant Sci. 2023 Jul 18;14:1141692. doi: 10.3389/fpls.2023.1141692. eCollection 2023.
The use of biocontrol agents with plant growth-promoting activity has emerged as an approach to support sustainable agriculture. During our field evaluation of potato plants treated with biocontrol rhizobacteria, four bacteria were associated with increased plant height. Using two important solanaceous crop plants, tomato and potato, we carried out a comparative analysis of the growth-promoting activity of the four bacterial strains: SLU99, S412, AV10, and EV23. Greenhouse and experiments showed that SLU99 promoted plant height, biomass accumulation, and yield of potato and tomato plants, while EV23 promoted growth in potato but not in tomato plants. SLU99 induced the expression of plant hormone-related genes in potato and tomato, especially those involved in maintaining homeostasis of auxin, cytokinin, gibberellic acid and ethylene. Our results reveal potential mechanisms underlying the growth promotion and biocontrol effects of these rhizobacteria and suggest which strains may be best deployed for sustainably improving crop yield.
使用具有促进植物生长活性的生物防治剂已成为支持可持续农业的一种方法。在我们对用生物防治根际细菌处理的马铃薯植株进行田间评估期间，有四种细菌与植株高度增加有关。我们使用两种重要的茄科作物番茄和马铃薯，对四种细菌菌株SLU99、S412、AV10和EV23的促生长活性进行了比较分析。温室和田间实验表明，SLU99促进了马铃薯和番茄植株的株高、生物量积累及产量，而EV23促进了马铃薯的生长，但对番茄植株无效。SLU99诱导了马铃薯和番茄中植物激素相关基因的表达，尤其是那些参与维持生长素、细胞分裂素、赤霉素和乙烯内稳态的基因。我们的结果揭示了这些根际细菌促进生长和生物防治作用的潜在机制，并表明哪些菌株可能最适合用于可持续提高作物产量。
