CHLOROPLASTS AS FUNCTIONAL ORGANELLES IN ANIMAL TISSUES

Trench , Robert K.; Greene , Richard W.; Bystrom , Barbara G.

doi:10.1083/jcb.42.2.404

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Article| August 01 1969

CHLOROPLASTS AS FUNCTIONAL ORGANELLES IN ANIMAL TISSUES

Robert K. Trench,

Robert K. Trench

From the Department of Zoology, University of California, Los Angeles, and the Space Biology-Brain Research Institute, University of California, Los Angeles, California 90024.

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Richard W. Greene,

Richard W. Greene

From the Department of Zoology, University of California, Los Angeles, and the Space Biology-Brain Research Institute, University of California, Los Angeles, California 90024.

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Barbara G. Bystrom

From the Department of Zoology, University of California, Los Angeles, and the Space Biology-Brain Research Institute, University of California, Los Angeles, California 90024.

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Author and Article Information

Robert K. Trench

From the Department of Zoology, University of California, Los Angeles, and the Space Biology-Brain Research Institute, University of California, Los Angeles, California 90024.

Richard W. Greene

From the Department of Zoology, University of California, Los Angeles, and the Space Biology-Brain Research Institute, University of California, Los Angeles, California 90024.

Barbara G. Bystrom

From the Department of Zoology, University of California, Los Angeles, and the Space Biology-Brain Research Institute, University of California, Los Angeles, California 90024.

Dr. Trench's present address is the Agriculture Department, Oxford University, Oxford, England

Received: August 07 1968

Revision Received: February 20 1969

Online ISSN: 1540-8140

Print ISSN: 0021-9525

1969

J Cell Biol (1969) 42 (2): 404–417.

https://doi.org/10.1083/jcb.42.2.404

The marine gastropod molluscs Tridachia crispata, Tridachiella diomedea, and Placobranchus ianthobapsus (Sacoglossa, Opisthobranchia) possess free functional chloroplasts within the cells of the digestive diverticula, as determined by observations on ultrastructure, pigment analyses, and experiments on photosynthetic capacity. In the light, the chloroplasts incorporate H¹⁴CO₃^-in situ. Reduced radiocarbon is translocated to various chloroplast-free tissues in the animals. The slugs feed on siphonaceous algae from which the chloroplasts are derived. Pigments from the slugs and from known siphonaceous algae, when separated chromatographically and compared, showed similar components. Absorption spectra of extracts of slugs and algae were very similar. The larvae of the slugs are pigment-free up to the post-veliger stage, suggesting that chloroplasts are acquired de novo. with each new generation.

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