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 KATSUMI, M.
Right arrow Articles by SAKURAI, A.
Right arrow Search for Related Content
PubMed
Right arrow Articles by KATSUMI, M.
Right arrow Articles by SAKURAI, A.
Agricola
Right arrow Articles by KATSUMI, M.
Right arrow Articles by SAKURAI, A.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Plant and Cell Physiology, 1967, Vol. 8, No. 3 399-407
© 1967

Article

PHYSIOLOGICAL RESPONSES OF LIGHT-GROWN CUCUMBER HYPOCOTYLS TO HELMINTHOSPOROL AND ITS DERIVATIVES

MASAYUKI KATSUMI1, SABURO TAMURA and AKIRA SAKURAI

Department of Agricultural Chemistry, University of Tokyo Tokyo
1Department of Biology, International Christian University Mitaka, Tokyo

Helminthosporol, helminthosporic acid and dihydrohelminthosporic acid stimulated hypocotyl elongation of light-grown cucumber seedlings. The relative activities of the three compounds were in the order H2-H-acid> H-acid> H-ol. The higher the dosage, the longer the promotion of the hypocotyl elongation lasted. The response of the hypocotyl to H-acid depended on the presence of cotyledons. As the amount of the cotyledon attached to the hypocotyl was reduced, the response decreased.

When IAA-oxidase was estimated as IAA metabolized per dry weight of the hypocotyl, there was an inverse relationship between IAAoxidase activity and H-ol-induced elongation of the hypocotyl. However, there was no difference between control and H-ol treated materials when IAA metabolized per plant was compared. It is unlikely that the mechanism of H-ol action is closely related to IAA-oxidase activity of the plant.

(Received April 5, 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.