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词汇 chlorophyll
释义

Definition of chlorophyll in English:

chlorophyll

noun ˈklɔːrəfɪlˈklɒrəfɪlˈklɔrəˌfɪl
mass noun
  • A green pigment, present in all green plants and in cyanobacteria, which is responsible for the absorption of light to provide energy for photosynthesis.

    叶绿素

    Example sentencesExamples
    • They also contain chlorophyll a, the same photosynthetic pigment that plants use.
    • Important in this process are the green chlorophyll pigments in leaves which capture the sun's energy.
    • Chlorella, a green algae, is rich in essential nutrients including chlorophyll, a useful blood purifier.
    • However, some genepy has a greenish tint depending on the amount of chlorophyll in the plants.
    • In higher plants, the pathways of chlorophyll and haem biosynthesis are tightly regulated at an early step.
    • The green comes from chlorophyll, which allows the microscopic plants to get energy from the sun.
    • In leaf tissue, the first outwardly visible signs of senescence are declining rates of photosynthesis and loss of chlorophyll.
    • When the potato is green, chlorophyll and solanine levels dramatically increase.
    • The ratio of soluble protein to chlorophyll in the isolated chloroplasts was approximately half that of whole leaf extracts.
    • Greens are full of chlorophyll and one of the best healing foods we can eat raw.
    • Most organisms with chlorophyll have additional pigments to capture more of the light energy that they receive.
    • Early in the year, when there is plenty of light, the leaves produce chlorophyll, the green colour in grass stains.
    • The chloroplast structure and the pigment assortment that includes chlorophyll a and c2, but not c1, suggest that only the red algae may be more primitive.
    • Unlike plants, though, cyanobacteria lack a second kind of chlorophyll, known as chlorophyll b, which in concert with chlorophyll a helps plants capture light.
    • The green colouring comes from chlorophyll, the same pigment that is found in foliage.
    • Examples of the former are the green chlorophyll pigment in plant leaves and the orange pigment present in carrots, carotene.
    • The efficiency of photosynthesis can readily be assessed by measuring chlorophyll a fluorescence of photosynthetic systems.
    • Mushrooms do not have chlorophyll and cannot photosynthesize in the way that green plants do, to produce food.
    • It is chlorophyll, specifically a kind called chlorophyll a, which transfers the energy absorbed from light to the molecules which go about storing it chemically.
    • The chlorophyll captures the energy of light, and makes it accessible to the plant for photosynthesis.

Derivatives

  • chlorophyllous

  • adjectiveklɔːrəˈfɪləs
    • The foliose root is chlorophyllous, with extremely reduced vegetative and reproductive adventitious shoots scattered on the dorsal surface, and root hairs (adhesive hairs) on the ventral surface.
      Example sentencesExamples
      • Various hypotheses have been proposed to explain the reduced viability of chlorophyllous spores, including a higher respiratory rate or inability to recover photosynthetic competence after desiccation.
      • Their roots cover rock surfaces, are chlorophyllous and have extremely short, leafy and floral shoots scattered on their dorsal surface; they play major roles in adherence, photosynthesis, organogenesis and reproduction.
      • Along the abaxial and adaxial margins of the leaf the subepidermal vascular bundles are interspersed with fibre bundles in the chlorophyllous mesophyll.
      • In a previous study, we suggested that once Coffea somatic embryos have developed chlorophyllous cotyledons exhibiting active photosynthesis, they could be successfully cultured photoautotrophically.

Origin

Early 19th century: coined in French from Greek khlōros 'green' + phullon 'leaf'.

Definition of chlorophyll in US English:

chlorophyll

nounˈklôrəˌfilˈklɔrəˌfɪl
  • A green pigment, present in all green plants and in cyanobacteria, responsible for the absorption of light to provide energy for photosynthesis. Its molecule contains a magnesium atom held in a porphyrin ring.

    叶绿素

    Example sentencesExamples
    • The green comes from chlorophyll, which allows the microscopic plants to get energy from the sun.
    • In leaf tissue, the first outwardly visible signs of senescence are declining rates of photosynthesis and loss of chlorophyll.
    • The ratio of soluble protein to chlorophyll in the isolated chloroplasts was approximately half that of whole leaf extracts.
    • They also contain chlorophyll a, the same photosynthetic pigment that plants use.
    • It is chlorophyll, specifically a kind called chlorophyll a, which transfers the energy absorbed from light to the molecules which go about storing it chemically.
    • Unlike plants, though, cyanobacteria lack a second kind of chlorophyll, known as chlorophyll b, which in concert with chlorophyll a helps plants capture light.
    • Examples of the former are the green chlorophyll pigment in plant leaves and the orange pigment present in carrots, carotene.
    • Important in this process are the green chlorophyll pigments in leaves which capture the sun's energy.
    • When the potato is green, chlorophyll and solanine levels dramatically increase.
    • Mushrooms do not have chlorophyll and cannot photosynthesize in the way that green plants do, to produce food.
    • Early in the year, when there is plenty of light, the leaves produce chlorophyll, the green colour in grass stains.
    • Most organisms with chlorophyll have additional pigments to capture more of the light energy that they receive.
    • Greens are full of chlorophyll and one of the best healing foods we can eat raw.
    • The efficiency of photosynthesis can readily be assessed by measuring chlorophyll a fluorescence of photosynthetic systems.
    • The green colouring comes from chlorophyll, the same pigment that is found in foliage.
    • The chlorophyll captures the energy of light, and makes it accessible to the plant for photosynthesis.
    • Chlorella, a green algae, is rich in essential nutrients including chlorophyll, a useful blood purifier.
    • In higher plants, the pathways of chlorophyll and haem biosynthesis are tightly regulated at an early step.
    • However, some genepy has a greenish tint depending on the amount of chlorophyll in the plants.
    • The chloroplast structure and the pigment assortment that includes chlorophyll a and c2, but not c1, suggest that only the red algae may be more primitive.

Origin

Early 19th century: coined in French from Greek khlōros ‘green’ + phullon ‘leaf’.

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