ISSN:
1573-5036
Keywords:
actinorhizal nodules
;
Casuarina cunninghamiana
;
Frankia
;
nitrogen fixation
;
oxygen
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract The gas diffusion pathway in nodules was traced by vacuum infiltration with India ink or aniline blue and by electron microscopy. India ink infiltration was observed in the outermost and the innermost cortex in sliced nodules, but not in intact nodules. With aniline blue infiltration, it was observed that intercellular air spaces in the outermost and the innermost cortex were connected to those in nodule roots. No air spaces were in contact with walls of infected cells, although intercellular air spaces existed in some groups of uninfected cells within the infected zone. Infiltration with either India ink or aniline blue could not be observed in the infected zone in essentially all cases. Thus it is suggested that the discontinuity of the intercellular air spaces represents a major resistance to O2 diffusion in nodules ofCasuarina cunninghamiana.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02232796
Permalink
