Monteiro, J.G. et al. 2014. Growth and proline content in pigeon pea seedlings subjected to osmotic stress and to exogenous putrescine. Pesquisa Agropecuaria Brasileira. 49, 1 (Apr. 2014), 18–25. DOI:https://doi.org/10.1590/S1678-3921.pab2014.v49.14671.