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 ?
Using combined analyses of nuclear ITS-2, chloroplastic partial Rubiso and mitochondrial cox3 markers, Mattio et al.
ii) An analysis of at least three DNA markers for which comparative data are available in the literature and on GenBank, in the case of Sargassum: the nuclear ITS-2, the chloroplastic partial Rubisco and the mitochondrial cox3.
According to Conklin and Last (1995), ozone causes a decline in the level of Arabidopsis thaliana nuclear-encoded mRNA for two chloroplastic antioxidant enzymes FeSOD and glutathione reductase.
Furthermore, reports suggest that transgenic tobacco overexpressing chloroplastic SOD is more resistant to ozone (Van Camp et al.