Aspects of floral biology and Houston florist

Ягода голубика — полезные свойства, где растёт и как выглядит

Different forms of floral biology:

Flowering plants, angiosperms, are relatively recent in plants. The oldest flower structures date back to about 140 million years ago. This period was followed by a great diversification of flowering plants. Darwin viewed it as an «abominable mystery» in a letter to Joseph Hooker in 1879. Early flowers were predominantly actinomorphic or had radial symmetry with multiple axes of symmetry. From these developed flowers with bilateral symmetry or zygomorphy. Attraction to visual cues from insect pollinators is believed to have influenced the evolution of zygomorphy.

Different groups:

The earliest groups of flowering plants among magnoliids and the families Chorantaceae, Ceratophyllaceae, Nymphaceae, Annonaceae, and Aristolochiaceae are bisexual, with both male and female parts present and usually functional within the larger floral structure. The main pollinators of these flowers were beetles, flies and thrips. They developed mechanisms to reduce self-pollination by changing the timing of maturation of the male and female parts. This altered timing mechanism or bifurcation was mainly expressed by protogyny or early maturation of female parts and only rarely by protandry or early maturation of male parts. The florists in houston can send flowers houston, rose bouquet in houston and beautiful sunflowers in houston, TX at the customer’s house.

The early flowers were mainly flat and dish-like, with later development of deep corolla tubes and mainly long tongue-like moths associated with pollinators. There are a large number of other mechanisms that enhance cross-pollination and prevent self-pollination. The forces driving the evolution of systems such as the holding of male and female flowers on different types of plants are still unclear. The evolution from solitary flowers to the production of inflorescences is also thought to be influenced by pollinator behaviour. Flower clusters can increase the visitation rate of pollinators. It can also reduce the risk of damage to individual flowers.

Volatile chemicals produced by flowers target insects. Some evidence suggests that there is significant overlap between chemicals produced by plants and those used by insects for their communication, especially for mating. In the classic case of orchids in the genus Ophrys, female wasps mimic the sex pheromones of bees that attempt to copulate with the flower and thus pollinate them. A study of the evolution of volatile chemicals in scarab beetles and flowers showed that insects evolved chemicals in the Jurassic period, while plants developed attractants in the later Cretaceous period.

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