[1] Univ Fed Rio Grande do Sul, Ctr Biotecnol, Grad Program Cell & Mol Biol, BR-91501970 Porto Alegre, RS, Brazil
[2] Embrapa Uva & Vinho, Rua Livramento,515,POB 130, BR-95701008 Bento Goncalves, RS, Brazil
[3] Univ Fed Rio Grande do Sul, Lab Plant Anat, Bot Dept, BR-91501970 Porto Alegre, RS, Brazil
[4] Univ Montpellier, Montpellier SupAgro, INRA, AGAP,CIRAD, Montpellier, France