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