אסיף מאגר המחקר החקלאי

The early synthesis and possible function of a 0.5 × 106 Mr RNA after transfer of dark-grown Spirodela plants to light

Year:

1975

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Volume :

67

Co-Authors:

Rosner, A., Department of Plant Genetics, The Weizmann Institute of Science Rehovot, Israel
Jakob, K.M., Department of Plant Genetics, The Weizmann Institute of Science Rehovot, Israel
Gressel, J., Department of Plant Genetics, The Weizmann Institute of Science Rehovot, Israel
Sagher, D., Department of Plant Genetics, The Weizmann Institute of Science Rehovot, Israel

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Abstract:

A 0.5 × 106 Mr RNA found in plastids of the aquatic angiosperm Spirodela, is synthesized at a much higher rate than any other rapidly labeling RNA species about 3-3 1 2 h after dark-grown plants are transferred to light. The pulse labeling kinetics of the 0.5 × 106 Mr RNA after transfer to light, argue against its involvement in the biogenesis of plant rRNAs. Although poly(A) RNA is found in Spirodela, poly(A) sequences are not detected in the 0.5 × 106 Mr RNA; yet a sucrose gradient fraction which includes RNA of this Mr stimulates amino acid incorporation by an E. coli cell free extract more than other RNA fractions. The possible involvement of the 0.5 × 106 Mr RNA as a chloroplast messenger is discussed. © 1975.

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