Science · 1966 · 35 citations · 20 references
Life SciencesPlant BiologyPlant SciencesPlant Cell BiologyPlant EcophysiologyPlant PhysiologyBud DormancyGibberellin BiologyLeaf DevelopmentMeristem DevelopmentPlant Hormone SignalingShoot DevelopmentCambial ActivityCambial Zone DevelopmentCytological ExaminationCytological FeaturesDormant StagesPhloem DifferentiationPhloem OrganizationSecondary Cell Walls
Gibberellic acid solutions supplied through micropipettes to explants from dormant branches of white pine (Pinus strobus L.) stimulate changes in the cambial zone. Immature sieve cells expand radially and exhibit cytological changes usually associated with spring maturation. Diflerentiation of sieve cells continues in response to treatment and is recognized by the birefringence of secondary walls when examined with the polarizing microscope.
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