Arabidopsis Thaliana as a Model System for the Study of the Effect of Inoculation by Azospirillum Brasilense Sp-245 on Root Hair Growth

The study used Arabidopsis thaliana seedlings to investigate the impact of inoculation with the rhizobacterium Azospirillum brasilense Sp-245 on root hair growth. It was found that inoculated seedlings had root hairs more than twice the length of non-inoculated controls, a result that was consistent and reproducible regardless of nitrogen or carbon sources in the growth medium. The promotion of root hair growth was observed even in media with or without 1% sucrose, although root growth was suppressed in carbon-starved seedlings. The study concluded that A. brasilense inoculation significantly increased the size of individual root hairs in Arabidopsis plants in vitro.