. Principles of modern biology. Biology. Fig. 31-7. The Plasmodium of a slime mold (Cribraria) creeping over the surface of an agar nutrient medium in a Petri dish. Note the irregular lobose form of the Plasmodium, which is quite typical of the Myxomycophyta generally. (Photo by G. W. Martin; from The Plant World, by Fuller and Carothers. Holt, Rinehart and Winston, Inc.) eter and sometimes they are almost micro- scopic. Each spore of the slime mold, typically, gives rise to four naked cells, capable of active amoeboid movement and often pos- sessing one or more flagella. Each of these swarm c
. Principles of modern biology. Biology. Fig. 31-7. The Plasmodium of a slime mold (Cribraria) creeping over the surface of an agar nutrient medium in a Petri dish. Note the irregular lobose form of the Plasmodium, which is quite typical of the Myxomycophyta generally. (Photo by G. W. Martin; from The Plant World, by Fuller and Carothers. Holt, Rinehart and Winston, Inc.) eter and sometimes they are almost micro- scopic. Each spore of the slime mold, typically, gives rise to four naked cells, capable of active amoeboid movement and often pos- sessing one or more flagella. Each of these swarm cells, which are called myxamoebae, usually divides a number of times, producing more myxamoebae. Eventually, however, the cells fuse in pairs, each pair forming one zygote. Then the zygote gives rise to the Plasmodium of the next generation. Some myxomycophytes are parasitic and a few are important in relation to plant dis- eases. For example, the club-root disease of cabbages and the powdery-scab disease of. Fig. 31-8. Sporangia of two different slime molds, growing on tree bark. Although the sporangium of a myxomycophyte is seldom bigger than a pinhead, the size, shape, colors, and markings are distinctive for each species. Those on the left are of Badamia foliicola, and those on the right are of Physarum globuliferum. (Photos by Richard Benjamin; from The Plant World.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marsland, Douglas, 1899-. New York, Holt, Rinehart and Winston
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