Sezione di Genetica e Microbiologia, Dipartimento di Biologia, Università degli Studi di Milano, Via Celoria 26, I-20133, Milano, Italy.
Plant Cell Rep. 1985 Aug;4(4):184-7. doi: 10.1007/BF00269284.
B and Pl are two genes involved in anthocyanin biosynthesis in maize (Zea mays) plant tissues. In this work the effect of B and Pl on pigment accumulation is analyzed in endosperm tissues, either cultured in vitro or scraped off from the seed. The results obtained indicate that the two genes play a different role in callus pigmentation: B exerts a qualitative change in pigment composition, while Pl controls the rate of pigment accumulation in the callus. Anthocyanin synthesis in all strains analyzed appears to be light independent. Two cases of instability in pigment production arisen in the endosperm cultures are described and discussed in relation to epigenetic variation in secondary metabolite content in plant tissue culture.
B 和 Pl 是两个参与玉米（Zea mays）植物组织中花色苷生物合成的基因。在这项工作中，分析了 B 和 Pl 对胚乳组织中色素积累的影响，这些组织是在体外培养的，或者是从种子上刮下来的。结果表明，这两个基因在愈伤组织的色素形成中起着不同的作用：B 基因改变了色素的组成，而 Pl 基因控制了愈伤组织中色素的积累速度。分析的所有菌株的花色苷合成似乎都与光无关。描述并讨论了胚乳培养中出现的两种色素产生不稳定性的情况，这与植物组织培养中次生代谢物含量的表观遗传变异有关。
