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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 113 (1977), S. 61-64 
    ISSN: 1432-072X
    Keywords: Cellulase ; Metabolism ; Sophorose ; Trichoderma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The cellulase inducer sophorose was rapidly catabolized to CO2 and H2O by Trichoderma: only small amounts were used to induce the synthesis of cellulase. 3H-sophorose uptake began after a lag of 1 h and its half-life in the medium was less than 5 h. Cellulase activity in the medium did not increase till 6 h after the addition of sophorose and reached a half maximum value at 14 h. The presence of free sophorose in the medium was required for continuous cellulase production. Several small sophorose addition induced much more cellulase than an equivalent single dose. These results are attributed to two pathways of sophorose utilization, a catabolic pathway that has a high capacity but low affinity for sophorose and an inductive pathway having a lower capacity but higher affinity for sophorose.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 137 (1984), S. 53-57 
    ISSN: 1432-072X
    Keywords: Sophorose ; b-Glucosidase ; Trichoderma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The disaccharide sophorose induces Trichoderma to increase a solube intracellular b-glucosidase that hydrolyses cellobiose, sophorose, and p-nitrophenyl-b-D-glucopyranoside. Simultaneously, it depresses the activity of a similar insoluble enzyme that is associated with the mycelium. Gel electrophoresis indicates that a single enzyme is responsible for all the soluble intracellular b-glucosidase activity. Cycloheximide severely inhibits sophorose induction of this enzyme indicating that the increase in activity normally obtained with sophorose is due to the de novo formation of the enzyme. The same sugars that promote the formation and release of cellulase by Trichoderma induce an increase in the soluble intracellular b-glucosidase. A function of the soluble intracellular enzyme appears to be the hydrolysis of cellobiose, which would otherwise accumulate during cellulose degradation, and thus to prevent cellobiose inhibition of cellulase.
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 23 (1970), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The isoenzyme patterns of individual Xanthium leaves at various stages of development were determined by acrylamid electrophoresis. The Leaf Plastochron Index was used to measure leaf and plant age. The nature of the changes occurring during leaf development differed from enzyme to enzyme and from gfrom isoenzyme to isoenzyme; for instance, one of the glucose-6-phosphate dehydrogenases was peculiar to very young leaves, another to rapidly expanding leaves, and yet another to still older ones. On the other hand, the number of amylase isoenzymes merely increased with leaf age. Many of the changes in the isoenzyme patterns coincide with the cessation of cell division in the leaf or with the completion of leaf growth. The particular isoenzyme patterns of a given leaf depended on both leaf and plant age. While the isoenzyme patterns of leaves from maximum aldolase activity per unit protein and at a later stage than the leaves from the vegetative plants.
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 1896-1896 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] While M. incognita incognita larvae in the proximity of a tomato seedling normally move to the roots within an hour1, in one experiment all the larvae were extremely sluggish. Usually entrance of the larvae into the host is accompanied by gall formation, but none of these larvae formed any galls. A ...
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 18 (1965), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
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