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Apoplastic domains and sub-domains in the shoots of etiolated corn seedlingsLight Green, an apoplastic probe, was applied to the cut mesocotyl base or to the cut coleoptile apex of etiolated seedlings of Zea mays L. cv. Silver Queen. Probe transport was measured and its tissue distribution determined. In the mesocotyl, there is an apoplastic barrier between cortex and stele. This barrier creates two apoplastic domains which are non-communicating. A kinetic barrier exists between the apoplast of the mesocotyl stele and that of the coleoptile. This kinetic barrier is not absolute and there is limited communication between the apoplasts of the two regions. This kinetic barrier effectively creates two sub-domains. In the coleoptile, there is communication between the apoplast of the vascular strands and that of the surrounding cortical tissue. No apoplastic communication was observed between the coleoptile cortex and the mesocotyl cortex. Thus, the apoplastic space of the coleoptile cortex is a sub-domain of the integrated coleoptile domain and is separate from that of the apoplastic domain of the mesocotyl cortex.
Document ID
20040090361
Document Type
Reprint (Version printed in journal)
Authors
Epel, B. L. (Tel Aviv Univ. Ramat-Aviv, Israel)
Bandurski, R. S.
Date Acquired
August 21, 2013
Publication Date
January 1, 1990
Publication Information
Publication: Physiologia plantarum
Volume: 79
ISSN: 0031-9317
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAGW-97
CONTRACT_GRANT: NAG2-362
CONTRACT_GRANT: DMB-850423
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Plant Biology
Non-NASA Center
NASA Discipline Number 29-20
NASA Program Space Biology