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Document Type

Research

Abstract

The development of the leaf abscission zone in Ginkgo biloba trees and seedlings was studied. Leaves from Ginkgo seedlings were debladed to enhance anatomical changes in the abscission region. The development of an abscission layer was observed six days after deblading. The formation of the zone was not complete, but an abaxial to adaxial pattern of development was apparent. No evidence of separation was noted. Debladed Ginkgo petioles remained green and did not abscise during the six weeks period of study. The development of an abscission layer was observed in leaves from a Ginkgo tree one week prior to separation. The zone occupied an area approximately eleven cells wide at the junction of the petiole and stem. Separation of the petiole occurred through an apparent dissolution of the middle lamella. The separation was observed in the distal region of the zone between the ninth and tenth cell layers. The pattern of leaf abscission zone development is similar in Ginkgo trees and seedlings.

Publication Date

1970

Journal Title

Proceedings of the Iowa Academy of Science

Volume

77

Issue

1

First Page

23

Last Page

31

Copyright

© Copyright 1970 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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