Dictionary > Tannosome

Tannosome

Definition
noun, plural: tannosomes
An organelle, particularly a special type of leucoplast, involved primarily in synthesizing tannins and polyphenols
Supplement
A tannosome is an organelle, particularly a plastid. 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.
Tannosomes are essential in synthesizing and producing tannins and polyphenols. Tannins are bitter-tasting aromatic compounds that are found commonly in bark, leaves, and unripe fruits. It has a protective function to plants as it deters herbivores and pathogens. It is also said to confer protection against UV radiation.
The first to describe this organelle were European researchers. 1 They described the tannosomes as organelles that originate from within the chloroplasts. The chloroplasts are characterized by having thylakoids, which are stacks of membrane-bound discs. The latter forms beads, which later would become tannosomes when they carry tannin, bud off, and are shuttled out of the chloroplast. These tannosomes will be carried off to the vacuole.
See also:

Reference(s):

1 Grens , K. (2013). New Organelle: The Tannosome. TheScientist.com. Retrieved from ://www.the-scientist.com/?articles.view/articleNo/37597/title/New-Organelle–The-Tannosome/.


You will also like...

Lentic community
Freshwater Communities & Lentic Waters

Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..

Chromosomes X and Y and Sex Determination
Chromosomes X and Y and Sex Determination

This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..

Birth Control and Contraception
Birth Control and Contraception

Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..

Pikas are an indicator species for climate change
Indicator Species and Endangered Species

Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..

Stem
Stems

Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..

Bryophytes
Bryophytes

Bryophytes are a plant group characterized by being nonvascular. They include the mosses, the liverworts, and the hornwo..