Understand the morphological characteristics of different types of gestational sacs
The gestational sac is one of the very important structures in plant reproductive tissues, and its morphological characteristics are closely related to plant growth and development. According to the different morphological characteristics of the gestational sac, it can be divided into different types, among which the eggplant-shaped gestational sac is a relatively common type. This article will introduce the morphological characteristics of different types of gestational sacs.
Morphological characteristics of eggplant-shaped gestational sac
Eggplant-shaped gestational sac refers to an eggplant-shaped gestational sac in a plant. Eggplant-shaped gestational sacs are usually symmetrical on the equatorial plane and evenly formed on both sides. The outside is usually covered with a layer of tissue called the exocarp. The eggplant-shaped gestational sac contains seeds inside, and the seeds are connected to the gestational sac wall by the ovule axis. When the seeds mature, the exocarp splits and the seeds can be dispersed into the surrounding environment through the layers of folded shells.
Morphological characteristics of placenta-type gestational sac
Placenta-type gestational sac refers to a placenta-like gestational sac in a plant. The placenta-type gestational sac originated from the ovary of some early plants and gradually evolved into the pistil of modern plants during the evolutionary process. The external appearance of the placenta-type gestational sac is an ovary, and the internal part is wrapped with ovules. The flaps or pistil walls on both sides can split to release seeds.
Morphological characteristics of composite gestational sac
A composite gestational sac refers to a gestational sac formed by the merger of multiple basic gestational sacs. In a composite gestational sac, each basic gestational sac can independently form a seed or embryo. Composite gestational sacs are very common in plants of the Citiaceae family and the Sequoia family.
Morphological characteristics of tubular gestational sac
Cylindrical gestational sac refers to a cylindrical gestational sac in a plant. The tube-shaped gestation sac is usually formed by the fusion of several exocarps on a plant structure (such as a fruit), with a central seed chamber often containing multiple ovules. Tube-shaped gestational sac is the typical shape of many fruits, such as persimmons, apples, pears, etc.
In summary, there are differences in the morphology of different types of gestational sacs. Eggplant-type gestational sac is eggplant-shaped, placental-type gestational sac originates from the ovary, compound-type gestational sac is a gestational sac formed by merging multiple basic gestational sacs, and tubular-type gestational sac is cylindrical in shape. For botanical researchers, understanding the morphological characteristics of different types of gestational sacs can help better understand the growth, development and evolution of plants.
