ARTICLE

ULTRASTRUCTURAL CHANGES IN CELLS OF PEA EMBRYO RADICLES DURING GERMINATION

Bong Yul Yoo ¹

¹ From the Department of Biology, University of New Brunswick, Fredericton, New Brunswick, Canada

Radicles (1 mm long) of pea embryo axes, excised from dormant seeds and from seeds soaked for 80 min, 8, 12, and 48 hr, were fixed in glutaraldehyde and postfixed in OsO₄. The nucleus was only slightly changed by 48 hr soaking, but cytoplasmic organelles underwent developmental changes. There was proliferation of endoplasmic reticulum, the appearance of dictyosomes, and an inward migration of lipid bodies. Most of these changes were observed within 8 hr after soaking started. Plastids, mitochondria, protein bodies, and protein crystalline bodies were also identified and their developmental changes were followed.

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This article has been cited by other articles:

• Bryant, T. R. (1972). Gas Exchange in Dry Seeds: Circadian Rhythmicity in the Absence of DNA Replication, Transcription, and Translation. Science 178: 634-636 [Abstract]  

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