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Callose deposition during gravitropism of Zea mays and Pisum sativum and its inhibition by 2-deoxy-D-glucoseIn etiolated corn (Zea mays L.) and etiolated pea (Pisum sativum L.) seedlings, a gravitropic stimulation induces the deposition of callose. In the corn coleoptiles this occurs within 5 min of gravity stimulation, and prior to the beginning of curvature. Both gravitropic curvature and callose deposition reach their maxima by 12 h. Within the first 2 h more callose is deposited on the upper (concave) side, but after 2-3 h, this deposition pattern is reversed. An inhibitor of protein glycosylation, 2-deoxy-D-glucose (DDG), inhibits callose production and considerably retards gravitropic bending in both species of plants. Mannose can relieve the inhibition of gravitropic bending by DDG. The pea mutant "Ageotropum", which does not respond to gravity when etiolated, also fails to produce callose in response to a gravitic stimulus. These correlations indicate that callose deposition may be a biochemical component of gravitropism in plant shoots.
Document ID
20040120371
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Jaffe, M. J. (Wake Forest University Winston-Salem, NC 27109, United States)
Leopold, A. C.
Date Acquired
August 22, 2013
Publication Date
May 1, 1984
Publication Information
Publication: Planta
Volume: 161
Issue: 1
ISSN: 0032-0935
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAGW-96
CONTRACT_GRANT: NAGW3-
CONTRACT_GRANT: PCM8003689
Distribution Limits
Public
Copyright
Other