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Stickstoffverwertung und Xanthanbildung bei Xanthomonas campestris
Author(s) -
Behrens U.,
Makarskij A.,
Ambrosius J.,
Franke R.
Publication year - 1977
Publication title -
zeitschrift für allgemeine mikrobiologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0044-2208
DOI - 10.1002/jobm.19770170503
Subject(s) - xanthomonas campestris , nitrate , yeast , bacterial growth , yeast extract , chemistry , growth medium , phase (matter) , food science , botany , bacteria , horticulture , biology , biochemistry , fermentation , organic chemistry , genetics , gene
In media with mixed nitrogen sources (nitrate plus yeast extract) a three auxic growth is observed. The first growth phase is characterized by preferential utilization of the amino acids of the yeast autolysate and the utilization of only small amounts of nitrate. During the second growth phase nitrate is preferentially utilized. In the third phase there is only growth without dividing of cells and the accumulation of xanthan takes place. The change from growth by dividing to growth without dividing means a change from balanced to unbalanced growth It is proposed that xanthan production is connected with unbalanced growth.