Urediospores of Puccinia spp. and other rusts are warm-temperature ice nucleators and harbor ice nucleation active bacteria - Morris, C. E; Sands, D. C; Glaux, C; Samsatly, J; Asaad, S; Moukahel, A. R; Gonçalves, Fábio Luiz Teixeira; Bigg, E. K (Atmospheric Chemistry and Physics Discussions, 2012)