Consequences of the water deficit on water relations and symbiosis in Vigna unguiculata cultivars oleh A.K.S. Lobato, R.C.L. Costa, C.F. Oliveira Neto, B.G. Santos Filho, M.C. Gonçalves-Vidigal, P.S. Vidigal Filho, C.R. Silva, F.J.R. Cruz, P.M.P. Carvalho, P.C.M. Santos, A. Gonela