On the Specificity and Products of Action of Xylanase from Chaetomium globosum Kunze

Xylanase Activity of Xanthomonas alfalfae in Culture and during Pathogenesis of Bacterial Leaf Spot of Alfalfa

“…(STROBEL 1963) and Chaetomium glohosum Kunze ex Fr. (SORENSEN 1952) produced xylanase only adaptively. Some plant pathogens do not produce xylanase.…”

“…Our evidence suggests that Xanthomonas alfalfae produces xylanase adaptively. Other microorganisms that also produce xylanase in the presence of xylan or related compounds include: fungi (GASCOIGNE andGASCOIGNE 1960, HANCOCK 1967), Streptomycetaceae (SORENSEN 1953), and non plant-pathogenic bacteria (SORENSEN 1953, INAOKA andSODA 1956). Few, however, have been tested to determine whether they produce xylanase constitutively.…”

“…The relatively late appearance of xylose suggested that it could have been released by a third enzyme. Various xyianases produced by other microorganisms include exoxylanases that hydrolyze xylan into xylobiose units (STROBEL 1963); endoxylanases that hydrolyze xylan and other xylooligosaccharides randomly into xylobiose units, but not to xylose (FuKUi 1958, FUKUI and SATO 1957, INAOKA and SODA 1956, WHISTLER and MASAK 1955; and xylobiase, which hydrolyzes xylobiose into xylose (SORENSEN 1952(SORENSEN , 1953. Consequently, organisms must produce at least two of those enzymes to degrade xylan to xylose.…”

Morphology and Nutrition of Chloridium chlamydosporis (Bisporomyces chlamydosporis)

“…Xylanase is an adaptive enzyme. It is produced in 2-3 days in Chaetomium globosum (33), but in the slow growing isolate A of C. chlamydosporis the incubation period may be too short for sufficient production of xylanase. This concept may be confirmed by the fairly ready utilization of xylose, which is the principal degradation product of xylan by xylanase.…”

Über das Vorkommen von Mannanase bei Pilzen

“…Ob die Sekretion dieses Enzyms clurch Mannan als Substrat wesentlich gefordert wird, laSt sich zur Zeit noch nicht ganz uberblicken, da bei friiheren Versuchen, auf anderen Substraten, die Nannanase-Aktivitat nicht gemessen wurde. Nach den bisherigen Erfahrungen, sind die in Tab SBRENSEN (1952) bestatigen.…”