02304naa a2200349 a 450000100080000000500110000800800410001902400380006010000190009824500980011726000090021552013220022465000110154665000150155765000210157265000170159365000110161065000220162165000220164365000240166565000120168965300150170165300160171670000200173270000200175270000190177270000230179170000310181470000160184570000220186177300710188321232732020-06-16       2020    bl uuuu     u00u1 u    #d7 a10.21475/ajcs.20.14.05.p23172DOI1 aRIBEIRO, J. M.  aIn vitro response of date palm (Phoenix dactylifera L.) inflorescence.h[electronic resource]  c2020  aOne of the major problems related to the implementation of date palm crops in Brazil is propagation. Therefore, the aim of this study was to evaluate the possibility of using tissue culture technique for the in vitro propagation of this species. Hence, the effect of 2iP and 2,4-D on the in vitro response of date palm inflorescence tissues, related to floral bud swelling, callusing, and rhizogenesis, was evaluated. The absence of 2,4-D was more detrimental to the in vitro response of inflorescence bud explants than absence of 2iP. In treatments without addition of 2,4-D to the culture medium, explants did not have swelling, callus or root formation. The treatment containing 150 mg/L 2,4-D in the presence of 1.5 mg/L 2iP initiated explant swelling, and treatments with either 100 mg/L or 150 mg/L 2,4-D, combined with 3.0 mg/L 2iP, were also efficient in stimulating in vitro swelling of inflorescence buds. Rhizogenesis was induced at the highest concentrations of 2,4-D (100 and 150 mg/L), combined with 4.5 mg/L 2iP, and was visually more evident in the treatment containing 150 mg/L 2,4-D + 4.5 mg/L 2iP. These results suggest that even higher concentrations of these two reagents might be efficient in the micropropagation of new existing date palm genotypes in the Submedium São Francisco River Valley.  aAuxins  aCytokinins  aMicropropagation  aRhizogenesis  aAuxina  aCultura de Tecido  aMicropropagação  aPhoenix Dactylifera  aTâmara  aCitocinina  aRizogênese1 aTEIXEIRA, S. L.1 aSOUZA, J. C. de1 aRIBEIRO, B. L.1 aOLIVEIRA, A. B. N.1 aCARNEIRO NETO, T. F. de S.1 aRIOS, L. S.1 aVIEIRA, R. dos S.  tAustralian Journal of Crop Sciencegv. 14, n. 5, p. 831-835, 2020.