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The role of glucose on the enzymes involved in the release of mature spores of Chlorella fusca
Author(s) -
Walter Joachim K.,
Rickert Mechthild,
Aach H. G.
Publication year - 1987
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1987.tb02871.x
Subject(s) - spore , biology , enzyme , biochemistry , sporangium , in vivo , d glucose , carbohydrate , chlorella , algae , botany , microbiology and biotechnology
An enzyme with carbohydrate‐releasing activity (CRA) plays a key role in the release of the mature autospores of Chorella fusca Shihira et Krauss var. vacuolata SAG 211‐8B. CRA liberates oligomeric carbohydrates from isolated sprorangia walls and furthermore splits p ‐nitrophenyl‐β‐ d ‐fucopyranoside. Observations on mixotrophically cultivated C. fusca and on isolated CRA indicated that in vitro the β‐ d ‐fucosidase activity is inhibited by glucose. In vivo glucose induces the well‐known gigantism of the algal cells by blocking sporulation, and this leads to the formation of giant sporangia containing up to 128 spores. Glucose and fucose were the only inhibitors of CRA isolated from the homogenate of C. fusca cells.