The fine structure of lamellar inclusions in the nuclei of nectary gland cells in Catalpa bungei

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Abstract
In the nectary of Catalpa bungei the gland cells contain nuclear inclusions consisting of stacks of lamellae 12.7 nm thick. Each lamella is composed of globular particles with a diameter of approximately 12.7 nm. The particles are arranged in a monolayer, revealing a regular square pattern in face view. In adjacent lamellae the globular subunits are almost exactly superimposed; each of them is probably built up of smaller subunits having a diameter of 0.4 nm.