Apoplastic domains and sub-domains in the shoots of etiolated corn seedlings |
| |
Authors: | Epel B L Bandurski R S |
| |
Institution: | Botany Dept, Tel Aviv Univ., George S. Wise Faculty of Life Sciences. Ramat-Aviv, Tel Aviv 69978, Israel;Dept of Botany and Plant Pathology, Michigan State Univ., East Lansing, MI 48824, USA. |
| |
Abstract: | Light 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. |
| |
Keywords: | Apoplast apoplastic domains apoplastic sub-domains Light Green maize translocation translocation barriers Zea mays |
本文献已被 PubMed 等数据库收录! |
|