Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by HEWITT, E. J.
Right arrow Articles by AFRIDI, M. M. R. K.
Right arrow Search for Related Content
PubMed
Right arrow Articles by HEWITT, E. J.
Right arrow Articles by AFRIDI, M. M. R. K.
Agricola
Right arrow Articles by HEWITT, E. J.
Right arrow Articles by AFRIDI, M. M. R. K.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Plant and Cell Physiology, 1967, Vol. 8, No. 3 385-397
© 1967

Article

COMPARATIVE EFFECTS OF SOME ANTIMETABOLITES ON RIBONUCLEIC ACID SYNTHESIS AND INDUCTION OF NITRATE REDUCTASE IN CAULIFLOWER LEAF TISSUES

E. J. HEWITT, B. A. NOTTON and M. M. R. K. AFRIDI1

Long Ashton Research Station, University of Bristol Great Britain

The effect of three antibiotics, actidione, patulin and polymyxin B, one synthetic antimetabolite, l-2-dichloro-4(p-nitrobenzenesulphonylamido)-5- nitrobenzene (DCDNS) and ribonuclease on the induction of nitrate reductase, gross ribonucleic acid content and the incorporation of phosphorus into the ribonucleic acid of cauliflower leaves has been studied.

The effects of inhibitor concentration and duration of incubation on the inhibition of enzyme production were tested.

The induction of the enzyme by molybdenum was inhibited by all compounds tested. Induction by nitrate was inhibited by actidione, patulin and ribonuclease. Gross ribonucleic acid was decreased by ribonuclease, patulin and DCDNS in nitrate-starved tissue.

Phosphorus incorporation into ribonucleic acid was inhibited by actidione, patulin, polymyxin B and DCDNS when infiltrated with nitrate into nitrate starved tissue and by patulin, polymyxin B and DCDNS with molybdenum as the inducer in molybdenum deficient tissue. Ribonuclease in nitrate starved tissue increased the incorporation of phosphorus. Some possible explanations of these results are advanced.

1Present address: Aligarh Muslim University, U. P., India.

(Received March 10, 1967; )
Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.