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(in green plant cells) a plastid that contains chlorophyll and in which photosynthesis takes place.
- ‘Even in the late stages of leaf senescence, the chloroplasts of guard cells remain green and functional.’
- ‘The outer layer of the abaxial epidermis contains sunken stomata with strongly fluorescing chloroplasts in the guard cells.’
- ‘Ripening of tomato fruit involves the differentiation of chloroplasts in young green fruit into chromoplasts in mature ripe red fruit.’
- ‘Fluorescence of guard cell chloroplasts was imaged when plants were at approximately the six-leaf stage.’
- ‘As Zeiger et al. have recently emphasized, guard cell chloroplasts show remarkable functional plasticity.’
Late 19th century: coined in German from Greek khlōros ‘green’ + plastos ‘formed’.
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