Electron antineutrinos from the sun with random magnetic fields

The magnetic field in the solar convective zone has a random small-scale co mponent with a r.m.s. value substantially exceeding the strength of a regul ar large-scale field. In the presence of a neutrino transition magnetic mom ent we find an effective production of electron antineutrinos in the Sun ev en for small neutrino mixing through the cascade conversions in the random magnetic field that would be a signature of the Majorana nature of neutrino if AR were registered. Basing on the present SK bound on electron antineut rinos we also estimated the corresponding excluded area in the plane Delta m(2), sin(2)2 theta.