Utilization of straw-based phenolic acids as a biofugicide for a green agricultural production
Section snippets
Preparation of PAs
Milled rice straw (10 g) was added to a 250-mL Erlenmeyer flask containing 100 mL 2 % NaOH (w/w), and this was shaken for 1 h at 60 °C and 100 rpm. Then, the mixture was centrifuged at 7370 × g for 10 min, and the supernatant was collected. The supernatant was acidified to pH 4.0 with 1 M H2SO4 and centrifuged at 7370 × g for 10 min. The residue was removed. Afterwards, an equal volume of ethyl acetate was added, followed by shaking for 30 min at 100 rpm. The organic phase was collected and
Antifungal activities of PAs
Phenolics, important secondary metabolites of plants, have significant impacts on F. oxysporum (6). However, the fungitoxic potentials of phenolics derived from rice straw on F. oxysporum have not been investigated. The rice straw had the following composition (g kg−1 rice straw): 356.8 ± 1.8 glucan; 178.3 ± 1.3 arabinoxylan; 106.3 ± 7.0 ash; 358.6 lignin and other phenolics, as reported by Zheng et al. (24). The ball-milled rice straw was treated with 2 % NaOH to release PAs before
Acknowledgments
This work was supported by the Special Fund for Agroscientific Research in the Public Interest (No. 201503135-14); Scientific Research Projects of Shanghai Science and Technology Committee (16391902000).
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