Which structure of ovule is rich in nutrient rich
Answers
The ovule is part of the makeup of the female reproductive organ in seed plants. It’s the place where female reproductive cells are made and contained, and it is what eventually develops into a seed after fertilization, only for the seed to then ripen and produce a complete adult plant. Ovules are contained in ovaries at the bottom of a vase-like structure, the carpel, which has a neck called a style and an opening at the top, called a stigma.
After fertilization the ovule starts to swell and its wall starts to toughen up in preparation to become a seed, while the ovary starts to grow around it and becomes the fruit. Keep in mind that some plants, like the avocado, have a single ovule in their ovary, while others, like the kiwifruit, have many, which develop into many seeds in the fruit. Another way that plants differ with regards to their ovules is the place where the ovules are found. Specifically, in gymnosperms, such as conifers, the ovules are found on the scales of female cones, while in angiosperms, which are flowering plants, the ovules are found inside of the ovary within the carpel.
Components of Ovules
The ovule is made up of the nucellus, the integuments that form the outermost layer, and the female gametophyte (called an embryo sac in flowering plants), which are found at the very center.
The Nucellus
The nucellus is the largest part of the ovule. It houses the embryo sac as well as nutritive tissue and actually remains present in some flowering plants after fertilization as a source of nutrients for the embyo.
The Integuments
The integument is the tough outer protective layer of the ovule. In the diagrams below we can see that gymnosperms, such as pine trees and spruce trees, usually have one integument in an ovule, so we call them unitegmic. On the other hand, angiosperms, like maples and daisies, typically have two integuments, and we call them bitegmic. The integument encloses the nucellus except for a small gap, which is called the micropyle.
Plant ovules
Plant ovules
Answer:
chlaza is the structure of ovule its rich in nutrients