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Introduction to Plant Developmental Biology – Lesson Summary

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Plant Developmental Biology
Plant Developmental Biology encompasses the study of how complex multicellular plants are developed from a single zygotic cell. It also describes the approaches used to study plant development.
Angiosperm Life Cycle
Angiosperm Plants alternate their life cycle between diploid sporophyte and haploid gametophyte. Sporophyte is an extensive phase whereas, Gametophyte is more restricted.
Male Gametophyte develops in anther of the stamens and contains haploid sperms. Female Gametophyte is produced within ovules of the carpel and contains haploid egg cells, two haploid polar nuclei, three antipodal and two synergid cells.
Double Fertilization is a characteristic feature of an Angiosperm which occurs when a pollen tube discharges two sperm nuclei into the female gametophyte. One sperm fertilizes the egg cell to develop a diploid zygote and the other combines with two polar nuclei to produce a triploid endosperm.
Plant Growth and Development
Growth is the irreversible change in size of cells and plant organs due to both cell division and enlargement.
Development is the progression from earlier to later stages in maturation. It is the process whereby tissues, organs, and whole plants are produced.
Developmental Plasticity in Plants
Developmental Plasticity comes from the meristem, which continuously produces organs throughout the plant life cycle. Plants' ability to optimise growth for a local environment may provide an advantage as habitats are altered by the changing climate.
Cell Fate Determination
The Fate of a Cell describes its future identity, or the identity of its daughter cells, before it is actually phenotypically detectable through differentiation or division.
A Cell's Lineage describes the developmental history of a cell from its birth until its final division and differentiation into a particular cell type, which is known as its cell fate. Cell Fate is determined by the actions of numerous cell intrinsic and extrinsic factors.