Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 7-Day Trial for You or Your Team.

Learn More →

ENZYMATIC STUDIES ON THE METABOLISM OF VESICULAR–ARBUSCULAR MYCORRHIZAS

ENZYMATIC STUDIES ON THE METABOLISM OF VESICULAR–ARBUSCULAR MYCORRHIZAS The ultrastructural localization of ATPase activities was identical in onion and sycamore mycorrhizas. DES‐sensitive ATPase activity was associated with the fungal plasmalemma and paramural bodies whilst a DES‐insensitive ATPase activity was detected within the fungal vacuole. The development of the mycorrhizal fungus within root cells modified the distribution of DES‐sensitive plasmalemma‐bound ATPase activity of the host. This became concentrated around the finer arbuscule branches and appeared to be a specialization of the invaginated host membrane which occurred when arbuscule structure was favourable for nutrient exchange. These observations strengthen the hypothesis that nutrient exchange in VA mycorrhizas must occur across the living host‐fungus interface and that phosphate is transferred from fungus to host by an active transport mechanism in the finer branches of the arbuscule. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png New Phytologist Wiley

ENZYMATIC STUDIES ON THE METABOLISM OF VESICULAR–ARBUSCULAR MYCORRHIZAS

Loading next page...
 
/lp/wiley/enzymatic-studies-on-the-metabolism-of-vesicular-arbuscular-wNtPjeiVUP

References (39)

Publisher
Wiley
Copyright
Copyright © 1982 Wiley Subscription Services
ISSN
0028-646X
eISSN
1469-8137
DOI
10.1111/j.1469-8137.1982.tb03238.x
Publisher site
See Article on Publisher Site

Abstract

The ultrastructural localization of ATPase activities was identical in onion and sycamore mycorrhizas. DES‐sensitive ATPase activity was associated with the fungal plasmalemma and paramural bodies whilst a DES‐insensitive ATPase activity was detected within the fungal vacuole. The development of the mycorrhizal fungus within root cells modified the distribution of DES‐sensitive plasmalemma‐bound ATPase activity of the host. This became concentrated around the finer arbuscule branches and appeared to be a specialization of the invaginated host membrane which occurred when arbuscule structure was favourable for nutrient exchange. These observations strengthen the hypothesis that nutrient exchange in VA mycorrhizas must occur across the living host‐fungus interface and that phosphate is transferred from fungus to host by an active transport mechanism in the finer branches of the arbuscule.

Journal

New PhytologistWiley

Published: Jan 1, 1982

There are no references for this article.