Pit-field Distribution in Relation to Cell Growth in Dwarf Peas, as Affected by Gibberellic Acid

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Abstract
Data are given relating cell length and pit-field frequency to internode length, as influenced by the application of gibberellic acid. Both cell extension and cell division are affected, the latter especially in internodes developing later after treatment. Where enhanced cell extension only occurs, existing pit-fields merely become spaced out. Where cell division is involved, this is accompanied by an increase in pit-field numbers so that daughter cells of the same type tend to have a characteristic number. This is in accordance with earlier observations on other plants and confirms the suggestion made previously of the existence of rather different patterns of cell-wall extension in dividing, as distinct from merely enlarging, cells.