REPRODUCTION
The act or process of reproducing
specifically: the process by which plants and animals give rise to offspring and which fundamentally consists of the segregation of a portion of the parental body by a sexual or an asexual process and its subsequent growth and differentiation into a new individual.
Climacteric is the period of life starting from the decline in ovarian activity until after the end of ovarian function.
The pollen tube (PT) Its sole purpose is to deliver sperm cells to the female gametophyte for double fertilization.
The Fruit set is a transition phase of the ovary from the flower to the developing fruit and takes place a few days after the floral opening.
Parthenocarpy refers to the development of fruit without fertilization.
The Seed is the embryonic stage of the plant life cycle.
Climacteric is the period of life starting from the decline in ovarian activity until after the end of ovarian function.
Photoperiodism is the functional or behavioral response of an organism to changes of duration in daily, seasonal, or yearly cycles of light and darkness.
A plant that requires a long period of darkness is termed a “short-day” (long-night) plant. Short-day plants form flowers only when the day length is less than about 12 hours. Many spring- and fall-flowering plants are short-day plants, including chrysanthemums, poinsettias, and Christmas cactus.
Other plants require only a short night to flower. These are termed “long-day” plants. These bloom only when they receive more than 12 hours of light. Many of our summer-blooming flowers and garden vegetables are long-day plants, such as asters, coneflowers, California poppies, lettuce, spinach, and potatoes.
some plants form flowers regardless of day length. Botanists call these “day-neutral” plants. Tomatoes, corn, cucumbers, and some strawberries are day-neutral. Some plants, such as petunias defy categorization.
The process by which plants use a prolonged cold period – winter – to promote flowering is known as vernalization.
Parthenogenesis (PG) is an asexual reproduction in which a female can produce an embryo without fertilizing an egg with sperm.
Totipotent cells can form all the cell types in a body, plus the extraembryonic, or placental, cells. Embryonic cells within the first couple of cell divisions after fertilization are the only cells that are totipotent
To form identical or monozygotic twins, one fertilized egg (ovum) splits and develops into two babies with exactly the same genetic information. To form fraternal or dizygotic twins, two eggs (ova) are fertilized by two sperm and produce two genetically unique children.
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