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单词 periclinal
释义

Definition of periclinal in English:

periclinal

adjective ˌpɛrɪˈklʌɪn(ə)lˌperəˈklīnl
Botany
  • 1(of a cell wall) parallel to the surface of the meristem.

    〔植〕(细胞壁)平周的

    Example sentencesExamples
    • Guard-cell walls parallel to the root surface are considered periclinal.
    • Ornamentation of the periclinal walls could be used to discriminate four morphological types.
    • Superficially it appears to be a periclinal chimera with a chlorophyll-deficient mutation in the second layer of the meristem.
    1. 1.1 (of cell division) taking place by the formation of periclinal walls.
      (细胞分裂)产生平周细胞壁的
      Example sentencesExamples
      • Moreover, in sun leaves, anticlinal and periclinal divisions occur almost synchronously.
      • This process is initiated by anticlinal and periclinal divisions of a few callus cells only.
      • They also report the absence of periclinal cell divisions at the base of the mutant awn.
      • Most parenchyma cells continue to divide by periclinal divisions.
      • In a number of species, regardless of their wall formation type, new periclinal cell divisions may occur when the tapetum differentiates.

Derivatives

  • periclinally

  • adverb
    Botany
    • The hypodermis is initiated by a separate layer of initials within the apical meristem that divides periclinally at least once to produce a biseriate to multiseriate zone of cells under the epidermis.
      Example sentencesExamples
      • In the basic type of wall formation, all the cells in the secondary parietal layers divide once periclinally, forming four new layers.
      • Because the aleurone cells continue to divide periclinally in the developing cereal endosperm the youngest cells are present in the sub-aleurone layer and the oldest cells in the central part of the endosperm.

Origin

Late 19th century: from Greek periklinēs 'sloping on all sides', from peri- 'around' + klinēs 'sloping' (from the verb klinein).

Definition of periclinal in US English:

periclinal

adjectiveˌperəˈklīnl
Botany
  • 1(of a cell wall) parallel to the surface of the meristem.

    〔植〕(细胞壁)平周的

    Example sentencesExamples
    • Ornamentation of the periclinal walls could be used to discriminate four morphological types.
    • Guard-cell walls parallel to the root surface are considered periclinal.
    • Superficially it appears to be a periclinal chimera with a chlorophyll-deficient mutation in the second layer of the meristem.
    1. 1.1 (of cell division) taking place by the formation of periclinal walls.
      (细胞分裂)产生平周细胞壁的
      Example sentencesExamples
      • They also report the absence of periclinal cell divisions at the base of the mutant awn.
      • Moreover, in sun leaves, anticlinal and periclinal divisions occur almost synchronously.
      • In a number of species, regardless of their wall formation type, new periclinal cell divisions may occur when the tapetum differentiates.
      • This process is initiated by anticlinal and periclinal divisions of a few callus cells only.
      • Most parenchyma cells continue to divide by periclinal divisions.

Origin

Late 19th century: from Greek periklinēs ‘sloping on all sides’, from peri- ‘around’ + klinēs ‘sloping’ (from the verb klinein).

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更新时间:2024/12/27 2:28:04