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词汇 acropetal
释义

Definition of acropetal in English:

acropetal

adjective əˈkrɒpɪt(ə)ləˈkräpid(ə)l
Botany
  • 1(of growth or development) upwards from the base or point of attachment.

    〔植〕(生长,发育)向顶的。BASIPETAL 的反义词

    The opposite of basipetal
    Example sentencesExamples
    • Similarly, meristem activities in the same acropetal sequence or on the whole-root-system architecture have not yet been compared.
    • These features might be partly associated with the acropetal development of the terminal inflorescence.
    • Sepal initiation began on the basal lateral flower and continued in an acropetal direction until all floral meristems had completed sepal initiation.
    • The Alismataceae have acropetal leaf development.
    • On average, an inflorescence developed 166 • 21 53 • 31 flowers that opened in acropetal order.
    1. 1.1 (of the movement of dissolved substances) outwards towards the shoot and root apices.
      (溶解物质的运动)向芽尖和根尖的
      Example sentencesExamples
      • It is not clear whether this acropetal increase of flower meristem identity is related to the acropetal loss of the SD suppression.
      • Xylem flow carries the transpiration stream and is normally entirely acropetal.
      • In every case, the basipetal movement was greater than the acropetal movement.

Derivatives

  • acropetally

  • adverb
    Botany
    • The floral meristems are formed acropetally and are initiated on the periphery of the inflorescence meristem, being protected by bracts.
      Example sentencesExamples
      • Bracts are initiated acropetally on the racemose inflorescence, or below the terminal flower.
      • One year after its extension period, each shoot develops axillary branches (including the relay shoot) whose vigour increases acropetally.
      • On each plant, leaves were identified on day 0 according to their nodal position with respect to the youngest fully expanded leaf, L0, and numbered acropetally, L1, L2, etc.
      • The abaxial surface of the wings bears hairs that are directed acropetally to the awn/wing interface and then become oriented towards the tip of the wing.

Origin

Late 19th century: from Greek akron 'tip' + Latin petere 'seek' + -al.

Definition of acropetal in US English:

acropetal

adjectiveəˈkräpid(ə)l
Botany
  • 1(of growth or development) upward from the base or point of attachment.

    〔植〕(生长,发育)向顶的。BASIPETAL 的反义词

    The opposite of basipetal
    Example sentencesExamples
    • These features might be partly associated with the acropetal development of the terminal inflorescence.
    • Sepal initiation began on the basal lateral flower and continued in an acropetal direction until all floral meristems had completed sepal initiation.
    • Similarly, meristem activities in the same acropetal sequence or on the whole-root-system architecture have not yet been compared.
    • The Alismataceae have acropetal leaf development.
    • On average, an inflorescence developed 166 • 21 53 • 31 flowers that opened in acropetal order.
    1. 1.1 (of the movement of dissolved substances) outward toward the shoot and root apices.
      (溶解物质的运动)向芽尖和根尖的
      Example sentencesExamples
      • It is not clear whether this acropetal increase of flower meristem identity is related to the acropetal loss of the SD suppression.
      • In every case, the basipetal movement was greater than the acropetal movement.
      • Xylem flow carries the transpiration stream and is normally entirely acropetal.

Origin

Late 19th century: from Greek akron ‘tip’ + Latin petere ‘seek’ + -al.

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