Dioecy inHonkenya peploides var.major (Caryophyllaceae) |
| |
Authors: | Takahiro Tsukui Takashi Sugawara |
| |
Institution: | (1) Department of Biology, Faculty of Science, Hirosaki University, 3 Bunkyo-cho, 036 Hirosaki, Japan |
| |
Abstract: | Sexual difference and pollination system inHonkenya peploides var.major were investigated. The present analyses indicate that sex expression of this plant is functionally dioecious, rather than
androdioecious, as described previously. Its flowers are largely pollinated by small bees, hover-flies, flies, and ants. Female
flowers were morphologically characterized by conspicuously longer styles and smaller petals, and had no pollen grains, while
male flowers had shorter styles, larger petals, and longer filaments, and produced viable pollen grains. Although the male
flowers possess many ovules in an ovary, they set fruits at a very low frequency in natural conditions and did not produce
fruits by pollination experiments. We suggest that the dioecy of this species has been derived from hermaphrodite through
gynodioecy, and not directly from hermaphrodite. |
| |
Keywords: | Caryophyllaceae Dioecy Floral biology Honkenya peploides Sex expression |
本文献已被 SpringerLink 等数据库收录! |
|