Essays on Ovule

What are the female reproductive parts of the angiosperm flower?

The female reproductive parts of a flower include the stigma, the ovary, and the style. Their collective name is normally referred to as carpel. a flower may be composed of one or several pistils. For reproduction to occur, all these parts play an important role. The stigma is the female part of a flower that receives pollen grains. It normally has a sticky surface to enable pollen grain to stick and germinate on it. There are several shapes of the stigma. The different shapes enable them to be well adapted to their role in reproduction. Some of the shapes ...

Analytical methods to evaluate seed dormancy in legumes

Abstract Legumes are known to have multiple health benefits. The seed coat in particular contains a number of bioactive compounds which possess antioxidant activity. Of great interest is the relationship between the chemical composition of the seed coat and its role in seed dormancy. Modern technological approaches are currently used to further identify these compounds and determine their role in seed development; these include NRIS FTIR, mass spectroscopy, electron microscopy and chromatography. The following review describes the constituents of the legume seed coat and their respective roles in dormancy and other stages of seed development. The review also highlights ...

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Introduction

Cannabis belongs to the genus of the flowering plants. Cannabis is one of the most studied plants in the history of biology that is why I selected this plant and studied various features of this plant. There are three known species of cannabis (Ritsner, 2011); Cannabis sativa, Cannabis ruderalis, and Cannabis indica. Cannabis sativa is considered as the most studied species. These species are mostly found in the Central and South Asia. They are also known as marijuana, hemp, hashish, dagga, bhang, grass, and loco weed. Cannabis plant is of different heights, i.e. it can be 1-20 ...

4 April,2014

Pollination can simply be described as a mechanism that involves the transfer of pollen contribute to the process of reproduction of plants. this process in plants reproduction entails ferterlization and reproduction (Barret). In scientific terms or biological terms, pollination can be described as the movement or transfer of pollen from one flower's anther to the stigma of same or other flower. This process or step is a pre-requisite for the ferterlization because it allows the fusion of the nuclei from one pollen grain with the nuclei of the ovule of the flower of other plant. The whole essence ...

Differences between Angiosperms and Gymnosperms? What makes them unique?

Angiosperms are believed to have evolved from gymnosperms. A significant difference between the angiosperm and the gymnosperm is that the angiosperms contain large water-conducting vessels in their wood whereas the gymnosperms have small conducting tubes (Rice, 2009). Additionally, the life cycle of angiosperms is much faster than that for gymnosperms. Fertilization in angiosperms may take a few days whereas in gymnosperms fertilization may take up to a year (Rice, 2009). The unique feature that makes angiosperms different from gymnosperms is that angiosperms have double fertilization (Rice, 2009).

Ovary of a Plant

The ovary of plant forms is a part of the female structure in a flower. It ...