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 ?
Protecting cotton photosynthesis during moderate chilling at high light intensity by increasing chloroplastic antioxidant enzyme activity.
Using combined analyses of nuclear ITS-2, chloroplastic partial Rubiso and mitochondrial cox3 markers, Mattio et al.
Elucidating deep-level phylogenetic relationships in Saxifragaceae using sequences for six chloroplastic and nuclear DNA regions.
Plant cells typically possess two different types of membrane-bound oleate desaturases: the microsomal oleate desaturase (FAD2), located in the endoplasmic reticulum, and the chloroplastic oleate desaturase (FAD6), located in the plastid iSomerville et al.
Mutants of Arabidopsis lacking a chloroplastic isoamylase accumulate phytoglycogen and an abnormal form of amylopectin.
Glutathione peroxidase and glutathione S-transferase are chloroplastic (Roxas et al.
Separate assays specific for ascorbate peroxidase and guaiacol peroxidase and for the chloroplastic and cytosolic isozymes of ascorbate peroxidase in plants.
For a comprehensive analysis of a plant population, nuclear as well as chloroplastic and mitochondrial genomes need to be evaluated.
Conklin and Last (1995) monitored the accumulation of mRNAs encoding both cytosolic and the chloroplastic antioxidant isozymes[integral of] using two different ozone-exposure protocols.
Enhanced tolerance to photooxidative stress of transgenic Nicotiana tabacum with high chloroplastic glutathione reductase activity.
2] with the chloroplastic ribulose 1,5-biphosphate carboxylase, oxygenase (RUBISCO).
This prediction is consistent with our observation that the soybean OAS-TL lacks an amino terminal chloroplastic or mitochondrial transit peptide.