|
|
Educative possibilities on flowers and fruits morphology in examples of important plant species
SLÁDKOVÁ, Eva
The diploma thesis follows up on the issues addressed in the bachelor's thesis. It focuses on the possibilities of teaching the morphological structures of flowers and fruits of flowering plants. The results are transformed into a form that can be used effectively in teaching. The work contains several teaching materials. Specifically, two chapters which introduce teaching presentations and worksheets on the topic of Flower and Fruit.
|
|
|
Moths as nocturnal pollinators in the tropics
Barták, Michal ; Tropek, Robert (advisor) ; Sedláček, Ondřej (referee)
in English In this thesis, I reviewed the available knowledge on the role of moths in the pollination of flowering plants in tropical ecosystems. Moths appeared as relatively frequent visitors of flowers with moth-attracting adaptations. Moths were proved to be essential pollinators of some specialized plant species. An obligatory mutualism with micromoths was found in more than 550 highly specialized plant species. Macromoths appeared as effective pollinators of numerous tropical shrubs, trees, and herbs from numerous plant families. Moths were the only recorded visitors and/or pollinators in several cases. In communities, plant species with moth pollination syndromes were relatively uncommon, and moths were generally infrequent visitors of their flowers, which could also be affected by abiotic factors. The proportion of actually moth-pollinated plant species in communities was even slightly lower than the proportion of plants with moth pollination syndromes in other areas. Some moths (e.g., hawkmoths) can thieve nectar from virtually any shorter-spurred/tubed flowers with their long proboscis. Other moths were reported as nectar thieves in some too accessible flowers. However, moths were reported to be rare nectar thieves and prefer visiting the flowers they also pollinate. This thesis should...
|
|
|
Reproduction of flowering plants and heat stress
Nedvědová, Kateřina ; Honys, David (advisor) ; Vítámvás, Pavel (referee)
This bachelor's thesis is a review summarizing the effects of heat stress on the reproductive development of flowering plants and their tolerance mechanisms. Plants are continuously exposed to changing environmental conditions and ever-increasing temperatures. Reproduction, especially the development of the male gametophyte, is particularly sensitive to these changes. This leads to defective development, sterile pollen, and fewer seeds, which affects crop productivity and yield. Therefore, it is essential to understand these changes, and especially the tolerance mechanisms. Keywords: reproduction, flowering plants, heat stress, tolerance, male gametophyte, female gametophyte
|
guest ::
