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- W4231514716 abstract "The volumes and dimensions of shoot apical meristem zones were determined for 21 species in 10 genera of the Cactaceae. If the volumes of the central-mother-cell zone (CMCZ), the peripheral zone (PZ), and the pith-rib meristem (PRM) are expressed as percentages of the total volume of the corpus, then they are remarkably constant (CMCZ = 11.1% of the volume of the corpus, PZ = 61.2% and PRM = 27.1%) regardless of the relative size of the apical meristems. The relative volume of the tunica decreases, however, as the whole apex increases. The zones have variable shapes, and whereas the PZ and PRM are always trapezoidal in longitudinal section, in apices with large volumes, these zones have a flatter, more flaring shape than they have in smaller apices. Thus large apices are flatter and less hemispherical than are small apices. The CMCZ, however, maintains a constant shape and is always relatively hemispherical regardless of its volume. A hypothesis that relates all of these shape and volume relationships as an integrated growth sequence is proposed." @default.
- W4231514716 created "2022-05-12" @default.
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- W4231514716 date "1979-09-01" @default.
- W4231514716 modified "2023-10-14" @default.
- W4231514716 title "Constancy of Relative Volumes of Zones in Shoot Apical Meristems in Cactaceae: Implications Concerning Meristem Size, Shape, and Metabolism" @default.
- W4231514716 doi "https://doi.org/10.2307/2442234" @default.
- W4231514716 hasPublicationYear "1979" @default.
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