Dictionary > Proplastid

Proplastid

Definition
noun, plural: proplastids
A small, colourless organelle that gives rise to a plastid (e.g. chloroplast, chromoplast, and leucoplast)
Supplement
A proplastid is an organelle found in the meristematic regions of the plant. It is colourless and small. It is from where plastids are derived. It is still undeveloped and may divide to produce more proplastids. As the cell containing proplastids mature, the proplastids transform and develop into plastids with specialized functions.
Plastids are organelles that come in different forms depending on their function. Plastids with chlorophyll (green pigment) are called chloroplasts. They give the plant parts the green colour. These plastids are involved in photosynthesis. Those that have other pigments are called chromoplasts. They are involved in producing and storing pigments, e.g. carotene, xanthophylls, etc. They abound in fruits, flowers, and roots. A plastid that lacks pigments is called leucoplast, and is involved mainly for storing food. A leucoplast may be an amyloplast that stores starch, an elaioplast that stores fat, or a proteinoplast that stores proteins. Tannosomes are also leucoplasts and are involved in the synthesis of tannins and polyphenols. Like mitochondria, plastids have their own DNA and ribosomes. Hence, they may be used in phylogenetic studies.
See also:


You will also like...

Non-Mendelian Inheritance
Non-Mendelian Inheritance

In this tutorial, find out more about certain types of inheritance that does not follow the Mendelian inheritance patter..

Chemical effects on plant growth and development
Effect of Chemicals on Growth & Development in Organisms

Plants and animals need elements, such as nitrogen, phosphorus, potassium, and magnesium for proper growth and developme..

New Zealand Fauna
New Zealand’s Unique Fauna

Meet some of New Zealand's unique fauna, including endemic insects, frogs, reptiles, birds, and mammals, and investigate..

Thermographic image of face and neck
Regulation of Organic Metabolism, Growth and Energy Balance

The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..

green plant cells
Plant Cells vs. Animal Cells

Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..

Cells in different stages of meiosis
Meiosis – The Genetics of Reproduction

Meiosis is a form of cell division that creates gametes. It is comprised of two divisions that in the end, the resulting..