2.1. MicroorganismThe strain of B. subtilis ICA56 was previously isolated from aBrazilian mangrove soil (Ceará State, Brazil) and was kindly donatedby the “Laboratório de Ecologia Microbiana e Biotecnologia” of theFederal University of Ceará. The 16S rRNA gene sequence of theICA56 can be accessed in the GenBank (KM235112). The strain wasmaintained on APGE medium slant (consisting of 15.0 g L−1agar,5.0 g L−1peptone, 5.0 g L−1glucose, and 2.5 g L−1yeast extract) at4◦C.