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脂肪族聚胺(精胺、精脒和腐胺)普遍存在于生长和繁殖的细胞中,并促进许多原核生物和真核生物的细胞生长(Bagni,1966;Herbstand和Snell,1949;Herbst,1970)。聚胺(10～100微摩尔)促进细胞分裂,但含很低量聚胺的组织在离体培养中不促进细胞增大,例如菊芋个别品种休眠期间的块茎(Bagni等人,1981)。聚胺的形态发生效应类似于吲哚乙酸的作用(Bagni,1966)。它们存在细胞器中,例如核糖体中。并促进复制和转录的许多过程(Bagni等人,1974;Cohen,1971)。聚胺在分子水平上的作用曾有过广泛研究,特别是关于与核酸的相互作用。它们附着在脱氧核糖核酸的狭窄沟槽里,使其容易成环,并维持转运核糖核酸
Aliphatic polyamines (spermine, spermidine and putrescine) are ubiquitous in cells that grow and multiply and promote cell growth in many prokaryotes and eukaryotes (Bagni, 1966; Herbstand and Snell, 1949; Herbst, 1970 ). Polyamines (10-100 micromolar) promote cell division, but tissues containing very low amounts of polyamine do not promote cell enlargement in ex vivo culture, such as tubers during dormancy of individual Jerusalem artichoke species (Bagni et al., 1981). The morphogenesis effect of polyamines is similar to that of indole acetic acid (Bagni, 1966). They are found in organelles, such as ribosomes. And promote many processes of replication and transcription (Bagni et al., 1974; Cohen, 1971). The role of polyamines at the molecular level has been extensively studied, particularly with regard to nucleic acid interactions. They attach to the narrow groove of DNA, making it easy to loop and maintain the transporter RNA