Wild plants harbor a diverse community of bacterial endophytes which can positively affect host plant growth. Changes in plant growth frequently reflect alterations in phytohonnone homoeostasis by plantgrowth-promoting (PGP) rhizobacteria which can decrease ethylene (ET) levels enzymatically by 1aminocyclopropane-1-carboxylate (ACC) deaminase or produce indole-3-acetic acid (IAA). Bacterial endophytes were isolated from roots, stems and leaves of the field-grown Solanum nigrom plant, a native wild Solanaceae plant species; their PGP traits (ACC deaminase activity, IAA production, inorganic phosphate solubilization and seedling colonization) were characterized; and their effects on the seedling vigor were detennined. A majority of isolates that promoted root growth were associated with ACC deaminase activity and IAA production. Colonization of bacterial endophytes inside the root tissues was explored by transforming them with plasmid carrying the gene encoding green fluorescent protein (GFPuv) and observing the inoculated tissues under fluorescence microscope. In short, the research opens a new trend in using native/natural bacterial endophytes with PGP traits from wild plant species to enhance yield of the cultivated crops.
Lọc theo danh mục
Lượt truy cập :
20,368,473
Xem toàn văn