SCREENING AND CHARACTERIZATION OF PLANT GROWTH-PROMOTING RHIZO-BACTERIA CONTAINING ACC DEAMINASE FROM LILY SOIL AND ROOTS
1-aminocyclopropane-1-carboxylate (ACC) deaminase-containing plant growth-promoting rhizobacteria (PGPR) catalyses the conversion of ACC, the immediate precursor of ethylene in higher plants, into ammonia and α-ketobutyrate. Reduced levels of ACC reduces the synthesis of endogenous ethylene, which reduce the negative effects of ethylene. Five PGPR strains containing ACC deaminase were screened from lily soil and roots using ACC as the sole nitrogen source. On the basis of their growth, morphological and microscopic cell properties and 16S rDNA sequence analysis, the results showed that three strains were identified as Erwinia and one as Chryseobacterium among four strains from the soil and one from lily roots as Acinetobacter. Some differences in ACC deaminase activities among all isolated strains were found. It is suggested that ACC deaminase-containing PGPR strains existed not only in lily cultivated soil, but also in lily roots. It could be a cost-effective, environment-friendly and promising potential strategy to reduce flower bud abscission, promote stem elongation, improve quality and production in lily. It can alleviate biotic and abiotic stresses and ensure sustainable agriculture, especially for ethylene-sensitive flowers, fruits and crops.
Huang, H., Huang, M., Fan, G., Liu, X., Zhang, Q., Wang, J. and Duan, Q. (2014). SCREENING AND CHARACTERIZATION OF PLANT GROWTH-PROMOTING RHIZO-BACTERIA CONTAINING ACC DEAMINASE FROM LILY SOIL AND ROOTS. Acta Hortic. 1027, 241-246
ACC deaminase, plant growth-promoting rhizobacteria, lily, salinity stress