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 ?
Chloroplast DNA variation of oaks in France and the influence of forest fragmentation on genetic diversity.
Molecular and morphological evidence clearly point to a symbiotic origin of two classes of eukaryotic organelles: mitochondria and chloroplasts.
For the four-gene data set, an ILD test comparing the three chloroplast regions was first performed.
Chloroplast ultrastructure and leaf histology were analyzed by transmission electron microscopy (TEM) at the Molecular and Cellular Imaging Center (Ohio Agricultural Research and Development Center, Wooster, OH).
In this work, we evaluated the protective effects as well as differences in the activity of defined fractions of cynarasaponins -1s, 2s and 3s, on AO- and ofloxacin-induced chloroplast DNA damage.
The complete chloroplast genome sequence, says David Stern, a biologist and vice president for research at BTI, has made it possible to test the response of Chlamydomonas to various environmental stresses.
The complete ITS region of nuclear rDNA and the chloroplast gene matK were amplified using PCR.
Function of plant PTOX was indicated to be important for chloroplast biogenesis and beneficial for stressed-plants (Aluru et al.
Furthermore, although protistan kleptoplasty often involves the presence of algal nuclei or nuclear remnants in addition to the chloroplast within the host cell (Gast et al.
Chloroplast DNA can serve as a main source of phylogenetic analysis (Small et al.
The aluminum stress up-regulated cDNA fragment showed sequence similarity to two of the members of Brassicaceae family; 79% homology to the Olimarabidopsis pumila chloroplast DNA and 77% homology to Nasturtium officinale chloroplast DNA(Table 1).