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

Plant and Cell Physiology, 1977, Vol. 18, No. 3 497-504
© 1977

Article

The effect of cotyledons on hypocotyl elongation in light-grown bean seedlings: Comparison between dwarf and tall varieties

Nobuharu Gotô

Department of Biology, Miyagi College of Education Aoba-Yama, Sendai 980, Japan

Hypocotyl sections with and without the cotyledons were cut from bean seedlings and incubated under white light of 6000 lux. The cotyledons had an inhibitory effect as well as a promotive effect on hypocotyl growth. The former effect was more striking in the dwarf variety, and the latter in the tall variety. When the hypocotyl units were exposed to light for shorter times (6 hr or less) or incubated under weaker light (1600 and 50 lux), the inhibitory effect of the cotyledons decreased greatly, and in the tall variety the presence of cotyledons produced no inhibition, but a promotion of hypocotyl growth. GA treatment enhanced hypocotyl growth and counteracted the growth inhibition caused by the cotyledons. On the whole, the GA effect was more marked in the tall variety than in the dwarf.

The elongation of bean hypocotyls may be controlled by a balance between the inhibitory and promotive effects of cotyledons, and the predominance of the former over the latter may be one of the causes for expressing dwarfing.

(Received November 13, 1976; )
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.