Abstract: After the leaves of Tillandsia usneciaes were fixed in 2.5% glutaraldehyde under strong sun light ,some globular objects were found in the chloroplast. These globular objects did not take the ordinary U-Pb double stain but they showed a cyclic change in amount following the change of sum light intensity. At 8 O′clock in the morning,only a few globular objects appeared in the chloroplast, At 10: 00 a. m.,there were several globular objects and they greatly increased at noon and gradually reduced in the afternoon,and finally disappearred at 4: 00 p. m. For detection of periodie acid-reactive complex carbohydrates with silver methenamine staining technique , the globular objects stained black. This result demonstrated that the globular objects may be polymers of intermediat products of the carbon cycle in photosynthesis and C3 compounds in malate decarboxylation.

Key words: Tillandsia usneciaes, Chloroplast , Globular object