chloroplast

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chloroplast

 [klor´o-plast]
the photosynthetic unit of a plant cell, containing all the chlorophyll.

chlor·o·plast

(klōr'ō-plast),
A plant cell inclusion body containing chlorophyll; occurs in cells of leaves and young stems. Site of photosynthesis in higher plants.
[chloro- + G. plastos, formed]

chloroplast

/chlo·ro·plast/ (-plast) any of the chlorophyll-bearing bodies of plant cells.
Chloroplastclick for a larger image
Fig. 101 Chloroplast . (a) Thin section through a whole chloroplast. (b) Thylakoid arrangement. (c) An enlarged section of a granum.

chloroplast

a type of PLASTID containing CHLOROPHYLL found within the cells of plant leaves and stems. The chlorophyll is packed within granules called quantasomes which are located in the walls of flattened sacs called LAMELLAE or thylakoids. The lamellae lie closely together in certain areas to form grana and are more separate in the intergranal regions. LIGHT REACTIONS of photosynthesis are thought to take place in the quantasomes while DARK REACTIONS occur in the watery matrix surrounding the lamellae, the stroma.
References in periodicals archive ?
Enzyme activity location is in chloroplasts and cytoplasm and the enzyme activity is dependent to zinc value in the plant.
Previously, scientists had used scant data--only a few chloroplast genes--as evidence of heteroplasmy, leaving room for debate.
As light levels change, their structures alter to send more or less light energy to chloroplasts.
The presence of chloroplasts in the leaf epidermis is common in pteridophytes (mainly in filmy ferns), aquatic plants, and some terrestrial gymnosperms and angiosperms, especially those that grow in the shade (Esau, 1965; Mickel, 1972; Dickinson, 2000).
PLANT CELL NUCLEAR, MITOCHONDRIAL AND CHLOROPLAST ISOLATION: PROCEDURES AND PITFALLS.
The chloroplasts combine the hydrogen with the carbon and oxygen to make the sugar, glucose.
When the sea slug feeds on its favorite seaweed, it swallows the plants' chloroplasts and stores them in its gut.
Three minutes later the sun lights up the highest green foliage and gradually the chloroplasts start waking up.
symbiotic theory for the evolutionary origin of chloroplasts (Margulis,
Expression of Bacillus anthracis protective antigen in transgenic chloroplasts of tobacco, a non-food/feed crop.
1999 Assembly of light harvesting complex II and biogenesis of thylakoid membranes in chloroplasts.