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单词 basipetal
释义

Definition of basipetal in English:

basipetal

adjective beɪˈsɪpɪt(ə)lbāˈsipədl
Botany
  • 1(of growth or development) downwards towards the base or point of attachment.

    〔植〕(生长,发育)向基的;从顶端向基部生长的。 ACROPETAL 的反义词

    The opposite of acropetal
    Example sentencesExamples
    • Lateral view of young inflorescence with basipetal initiation of flowers in the axil of bracts.
    • We also show that cellular responses are propagated in a basipetal direction in P. rhoeas pollen tubes.
    • Alterations of the actin cytoskeleton and arrest of cytoplasmic streaming induced by the SI reaction are propagated in a basipetal direction in the tubular cell.
    • Ellipsoidal microconidia and falcate macroconidia are formed from phialides by basipetal division; globose chlamydospores with thick walls are formed acrogenously from hyphae or by the modification of hyphal cells.
    • Expression of the DXR gene in adaxial phloem parenchyma cells was more pronounced in the young revoluted base of the leaves with a basipetal gradient decreasing toward the tips of older leaves.
    1. 1.1 (of the movement of dissolved substances) inwards from the shoot and root apices.
      (物质溶解时的运动)向基的
      Example sentencesExamples
      • In every case, the basipetal movement was greater than the acropetal movement.
      • In the apical area 10-20 m from the apex, movement of the larger organelles slowed down slightly, before they were transported back in a basipetal direction resuming the same speed as before.
      • However, a continuous basipetal transport of auxin from the shoot to the rooting zone (upper part taproot) is required for adventious root formation.
      • Furthermore, in both animals and plants, gradients of growth factors are established, in plants by basipetal auxin transport, inducing and controlling vascular differentiation.
      • From there they will flow to other parts of the shoot in both basipetal and acropetal directions.

Derivatives

  • basipetally

  • adverb
    Botany
    • The hairs are oriented acropetally, while in the proximal part of the sac they grow basipetally, i.e., oriented toward the lemma-sac interface.
      Example sentencesExamples
      • When the exposure time was extended to 60 min, a large amount of phosphorus was transported basipetally to the shoot from root sections located 80 mm from the root tip, where the xylem is completely mature.
      • The number of rings of kernels from the base to the tip of the ear was counted and the apical ear region was defined as the fifth two nodal rings of fertilized florets, counting basipetally from the apex.
      • The drag-induced bending moments and stresses (computed on the basis of empirically determined stem dimensions and wind speeds) increased basipetally toward the base of the tree.
      • Tree height, branch height, leaf position (numbered basipetally from the youngest, fully expanded leaf), and direction of the nearest canopy gap were noted.

Origin

Mid 19th century: from basis + Latin petere 'seek' + -al.

Definition of basipetal in US English:

basipetal

adjectivebāˈsipədl
Botany
  • 1(of growth or development) downward toward the base or point of attachment.

    〔植〕(生长,发育)向基的;从顶端向基部生长的。 ACROPETAL 的反义词

    The opposite of acropetal
    Example sentencesExamples
    • Lateral view of young inflorescence with basipetal initiation of flowers in the axil of bracts.
    • Ellipsoidal microconidia and falcate macroconidia are formed from phialides by basipetal division; globose chlamydospores with thick walls are formed acrogenously from hyphae or by the modification of hyphal cells.
    • We also show that cellular responses are propagated in a basipetal direction in P. rhoeas pollen tubes.
    • Alterations of the actin cytoskeleton and arrest of cytoplasmic streaming induced by the SI reaction are propagated in a basipetal direction in the tubular cell.
    • Expression of the DXR gene in adaxial phloem parenchyma cells was more pronounced in the young revoluted base of the leaves with a basipetal gradient decreasing toward the tips of older leaves.
    1. 1.1 (of the movement of dissolved substances) inward from the shoot and root apexes.
      (物质溶解时的运动)向基的
      Example sentencesExamples
      • Furthermore, in both animals and plants, gradients of growth factors are established, in plants by basipetal auxin transport, inducing and controlling vascular differentiation.
      • However, a continuous basipetal transport of auxin from the shoot to the rooting zone (upper part taproot) is required for adventious root formation.
      • In every case, the basipetal movement was greater than the acropetal movement.
      • From there they will flow to other parts of the shoot in both basipetal and acropetal directions.
      • In the apical area 10-20 m from the apex, movement of the larger organelles slowed down slightly, before they were transported back in a basipetal direction resuming the same speed as before.

Origin

Mid 19th century: from basis + Latin petere ‘seek’ + -al.

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更新时间:2024/9/21 15:31:20