非洲菊盘状花雄蕊发育与舌状花生长着色的对应关系

Stamen Development of Disc Florets in Relation to Petal Growth and Pigmentation of Ray Florets in Gerbera hybrida

摘要:

非洲菊(Gerberahybrida)头状花序由外轮舌状花和内轮盘状花构成。通过观察内轮盘状花雄蕊花粉囊和花粉粒的形态结构与发育顺序,和测定外轮舌状花花瓣的长度、宽度、花色素苷含量等,对它们之间的对应关系进行了研究。花序外轮舌状花花瓣开始着色时为P3期,此时第1轮盘状花出现成熟花粉粒。研究明确了内轮盘状花花粉粒发育与外轮舌状花生长时期和花色素苷积累的对应关系。

Abstract:

Petal growth and anthocyanin content in ray florets of Gerbera hybrida (Compositae) were determined during the six phases (from P1 to P6) of head development, and the development of pollen sacs and grains in disc florets were observed as well. The results showed that the anthocyanin in P3 phase started to increaseaccompanying the maturation of pollen grains in outer whorls of disc florets. The growth phase and pigmentation of ray florets were closely related to the stamen development of disc florets in head of the plant.