Dictionary > Amyloplast


noun, plural: amyloplasts
(botany) A type of leucoplast found in the cytoplasm of a plant cell, and serves as storage organelle of amylopectin
Plastids are organelles involved in the synthesis and storage of food. They are found within the cells of photosynthetic eukaryotes. In plants, plastids may develop into these forms: (1) chloroplasts, (2) chromoplasts, (3) gerontoplasts, and (4) leucoplasts. Leucoplasts are colourless plastids because they lack pigments. Their role is primarily for storage. Depending on the content of the leucoplasts, they may be amyloplasts, elaioplasts, proteinoplasts, or tannosomes.
Amyloplast is a leucoplast that is primarily involved in storing starch and detecting gravity. As for storing starch, the amyloplasts transform glucose into starch by polymerization of glucose and store the starch grains in the stroma. Most of the amyloplasts can be found in underground storage tissues of plants, such as potato. The amyloplasts, though, can turn into chloroplasts, such as seen in potato tubers that are exposed to light. They become green as the amyloplasts convert into chloroplasts.
As for detecting gravity, the amyloplasts are able to perceive gravity (gravitropism). These amyloplasts involved in gravitropism are referred to as statoliths.
Word origin: Gk ámylon (starch) + Gk plastós (formed, molded)
See also:

You will also like...

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..

Sugar Homeostasis
Sugar Homeostasis

The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..

kinesin motor proteins transporting molecules across microtubules
Movement of Molecules Across Cell Membranes

Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..

Selective Breeding
Selective Breeding

Gregor Mendel's studies into Monohybrid and Dihybrid crossing and Charles Darwin's study of evolution and natural select..

An artistic depiction of a human embryo
Growth and Development of a Human Baby

Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..

Biological Viruses
Biological Viruses

Viruses possess both living and non-living characteristics. This unique feature distinguishes them from other organisms...