THE PLANT REPRODUCTIVE AND DEVELOP STRUCTURE.
Plant I have evolved differently productive strategies for the continuation of the species. some plants reproduce sexually when others reproduce as this asexually. Every plant reproductive system is the flower. Plant is really depends pollinating agent while asexual reproduction is independent of this agent.
Asexual reproduction produces plants that are genetically identical to parent plant because no mixing of male and female gamete place. Naturally this plant can sustain a very stable environmental condition when compared with plants that produces from sexual reproduction.
Sexual reproduction : Plants classed as angiosperms have flowers as their reproductive organ. All plants have the ability to reproduce sexually and the mechanisms to support it. A flower's primary duty is to reproduce sexually and create seeds. Seeds represent the next generation, and in most plants, they are the principal means of dispersing individuals across the landscape. Dispersion in reality
M
ale Gametophyte
Bracts, a form of modified leaf, are linked to the central axis of a male cone. Microspores will form on the bracts, which are known as microsporophylls. The microsporangium is where the microspores grow. Microsporocytes divide via meiosis to produce four haploid microspores within the microsporangium. The microspore's mitosis produces two nuclei: the tube nucleus and the generative nucleus When the male gametophyte (pollen) matures, it is discharged from male cones and carried by the wind to female cones.
Female gametophyte
The female cone likewise has a central axis that is covered in megasporophyll bracts. Megaspore mother cells can be found in the megasporangium of the female cone. Meiosis separates the megaspore mother cell into four haploid megaspores. The multicellular female gametophyte is formed by dividing one of the megaspores, while the remainder of the structure is formed by dividing the others.
Reproductive process
The pollen tube cell creates the pollen tube when it lands on the female cone, through which the generative cell migrates to the female gametophyte via the micropyle. The pollen tube grows and migrates towards the female gametophyte during the course of a year. The generative cell in the male gametophyte divides into two sperm nuclei, one of which unites with the egg and the other degenerates. The diploid zygote is generated once the egg is fertilized, and it splits by mitosis to form the embryo. During the development of the seed, the scales of the cones close. A seed coat is produced by the female sporophyte and protects the seed. development of seeds takes another one to two years. Once the seed is ready to be dispersed, the bracts of the female cones open to allow the dispersal of seed; no fruit formation takes place because gymnosperm seeds have no covering.
Flower structure
The calyx, corolla, androecium, and gynoecium are the four primary sections, or whorls, of a flower. The green, leafy features known as sepals, which are collectively known as the calyx and help to protect the unopened bud, are found on the flower's outermost whorl. The corolla, or second whorl, is made up of petals that are usually vividly colored. Whether the plant is a monocot or a dicot determines the number of sepals and petals. The perianth is made up of the calyx and the corolla. The androecium is the third whorl, which houses the male reproductive organs. The microsporangia are contained in the anthers of the androecium's stamens. The structure's innermost group
If both male and female flowers are borne on the same plant (e.g., corn or peas), the species is called monoecious (meaning “one home”). Species with male and female flowers borne on separate plants (e.g., C. papaya or Cannabis)are termed dioecious, or “two homes.” The ovary, which may contain one or multiple ovules, may be placed above other flower parts (referred to as superior); or it may be placed below the other flower parts (referred to as inferior).
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Wow very educative
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