اثر باکتری‌های محرک رشد بر مؤلفه‌های جوانه‌زنی و رشد گیاهچه برنج

In order to evaluate the effect of the plant growth promoting bacteria on germination characteristics and seedling growth of two rice cultivars, an experiment was conducted on randomized completely design with four replications in laboratory of Agriculture College of the university of Guilan. In this research, evaluated treatments consisted different strains of plant growth promoting bacteria (PGPR) and their metabolits including without inoculation (control), inoculation with P.fluorescens strain 168, inoculation with metabolits of P.fluorescens strain 168, inoculation with P.fluorescens strain 136, inoculation with metabolits of P.fluorescens strain 136, inoculation with P.fluorescens strain 41, inoculation with metabolits of P.fluorescens strain 41. In the end of experiment, were measured germination percentage, germination speed, radicle and shoot length, shoot fresh weight, radicle fresh weight, vigor index, radicle dry weight and shoot dry weight. Results showed inoculation with P.fluorescens strain 168 and inoculation with metabolits of P.fluorescens strain 168 improved rape seed germination characteristics. The present findings showed that these microorganisms can affect on seed development, germination and growth parameters of seedling maybe by production of siderophores, the synthesis of antibiotics and enzymes.