Conformation of chloroplast DNA in wheat leaves
- 1 January 1970
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Botany
- Vol. 48 (1) , 173-175
- https://doi.org/10.1139/b70-024
Abstract
Sedimentation and electron microscopic studies have provided no evidence for the presence of circular DNA (deoxyribonucleic acid) in chloroplasts from wheat leaves. Electron microscopy of osmotically disrupted chloroplasts has revealed the presence of linear duplex filaments, some with a tertiary helicoidal configuration and possibly monostranded filaments. None of these structures was observed if the chloroplasts were previously treated with DNase (deoxyribonuclease), but the tertiary configuration was somewhat disorganized by RNase (ribonuclease).Keywords
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