Morphogenesis in cultured thin layers and pith explants of tobacco. 2: Early hormone-modulated polyamine biosynthesis

6-benziladenina 6-benzyladenine ba benzyladenin biosynthese biosynthesis decarboxylase hormonas hormone hormones liasas lyase lyases medula moelle morphogenese morphogenesis nicotiana tabacum phytohormon pith plant growth substances poliaminas polyamine polyamines putrescin spermidin stems sustancias de crecimiento vegetal tallo tige