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词汇 chloroplast
释义

Definition of chloroplast in English:

chloroplast

noun ˈklɔːrə(ʊ)plɑːstˈklɒrə(ʊ)plɑːstˈklɔːrə(ʊ)plastˈklɒrə(ʊ)plastˈklôrəˌplast
Botany
  • A plastid in green plant cells which contains chlorophyll and in which photosynthesis takes place.

    〔植〕叶绿体

    Example sentencesExamples
    • Fluorescence of guard cell chloroplasts was imaged when plants were at approximately the six-leaf stage.
    • The outer layer of the abaxial epidermis contains sunken stomata with strongly fluorescing chloroplasts in the guard cells.
    • As Zeiger et al. have recently emphasized, guard cell chloroplasts show remarkable functional plasticity.
    • Even in the late stages of leaf senescence, the chloroplasts of guard cells remain green and functional.
    • Ripening of tomato fruit involves the differentiation of chloroplasts in young green fruit into chromoplasts in mature ripe red fruit.

Origin

Late 19th century: coined in German from Greek khlōros 'green' + plastos 'formed'.

Definition of chloroplast in US English:

chloroplast

nounˈklôrəˌplast
Botany
  • (in green plant cells) a plastid that contains chlorophyll and in which photosynthesis takes place.

    〔植〕叶绿体

    Example sentencesExamples
    • As Zeiger et al. have recently emphasized, guard cell chloroplasts show remarkable functional plasticity.
    • 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.
    • 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.

Origin

Late 19th century: coined in German from Greek khlōros ‘green’ + plastos ‘formed’.

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