Abstract

Zinc oxide nanoparticle (ZnO NPs) has been used as a fertilizer alternative, although some applications technique and metal-microbial effects should be studied. This research evaluated the bioefficiency of synthetic ZnO NPs in soybean seedlings combined with different water status and with or without PcO6 bacteria. ZnO NPs performed in sand inhibited growth and fluorescence parameters. Still, when soybean seeds were exposed to ZnO NPs seed priming the root mass was increased, mainly in non-drought conditions. Soybean plants cultivated in drought conditions will have compromised development, although was demonstrate soybeans seed inoculation with PcO6 may decrease undesired effects from drought. Also, PcO6 soybean inoculation mitigate metal ZnO toxicity. Here, one of the first positive report about soybean interaction with PcO6 by drought and metal mitigation of toxicity. In addition, the best way to apply ZnO was through seed priming, while sand application was toxic and foliar application had no effects.

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