congresos y reuniones científicas
VOLATILE COMPOUNDS FROM Klebsiella oxytoca KD70 PROMOTE GROWTH OF ARABIDOPSIS SEEDLINGS.
CLAPS, MARÍA PAULA; DANTUR, KARINA; CHALFOUN, NADIA; ADLER, CONRADO; PESCARETTI, MERCEDES; FILIPPONE, MARÍA PAULA; GONZALEZ, VICTORIA
Congreso; SAIB 2016; 2016
Plant growth-promoting bacteria (PGPB) can enhance plant growth by direct or indirect mechanisms including release of volatile compounds (VCs), which constitutes an important long-distance signaling between bacteria and plants.In this study we evaluated the ability of a sugarcane endophytic bacterium,Klebsiella oxytocaKd70, to promote growth of Arabidopsis thalianaseedlings by production of VCs. Disinfected seeds ofA. thalianasown on MS agar plates were exposed to agar plugs (5 mm2), attached to the Petri dish lid, containing Kd70 bacteria grown on a tryptone-glucose saline medium. Parafilm-sealed dishes containing plant seedlings and bacteria were incubated under optimal plant growth conditions and the length of primary roots, number of secondary roots and total leaf area were determined at 4, 7, 10 and 15 days of growth.Our results show that seedlings exposed to bacterial VCs showed longer primary roots (4 days), greater number of secondary roots (10 days) and foliar development (15 days) than control plants grown without bacteria. These findings indicate that VCs produced by Kd70 stimulate plant growth and could be used as biofertilizers