The chemotropic response of the water mould Achlya ambisexualis to nutrients was investigated. Among individual amino acids only methionine was active. Other amino acids were active only in combinations containing cysteine. Methionine was unique among the amino acids tested in its ability, when incorporated uniformly into the water agar substratum, to disrupt chemotropism towards an attractant mixture of amino acids. Among non-amino acid compounds tested for chemotropic activity only S-adenosylmethionine was active. Carboxyl methylation of protein was promoted by amino acid mixtures.
AdlerJ.,
DahlM. M.1967; A method for measuring the motility of bacteria and for comparing random and non-random motility. Journal of General Microbiology 46:161–173
CantinoE. C.,
LovettJ. S.1960; Respiration of Blastocladiella during bicarbonate-induced morphogenesis in synchronous culture. Physiologia plantarum 13:450–458
FischerF. G.,
WernerG.1955; Eine Analyse des Chemotropismus einiger Pilze, insbesondere der Saprolegniaceen. Hoppe-Seyler’s Zeitschrift für physiologische Chemie 300:211–236
HaroldR. L.,
HaroldF. M.1980; Oriented growth of Blastocladiella emersonii in gradients of ionophores and inhibitors. Journal of Bacteriology 144:1159–1167
MusgraveA.,
EroL.,
SchefferR.,
OehlersE.1977; Chemotropism of Achlya bisexualis germ hyphae to casein hydrolysate and amino acids. Journal of General Microbiology 101:65–70
O’DeaR. F.,
ViverosO. H.,
AxelrodJ.,
Aswani-Kumar S.,
SchiffmannE.,
CorcoranB. A.1978; Rapid stimulation of protein carboxymethylation in leucocytes by a chemotactic peptide. Nature London: 272462–464
ShowellH. J.,
FreerR. J.,
ZigmondS. H.,
SchiffmannE.,
AswanikumarS.,
CorcoranB. A.,
BeckerE. L.1976; The structure-activity relations of synthetic peptides as chemotactic factors and inducers of lysosomal enzyme secretion for neutrophils. Journal of Experimental Medicine 143:1154–1169
Van WaardeA.,
Van HaastertP. J. M.1984; Transmethylation inhibitors decrease chemotactic sensitivity and delay cell aggregation in Dictyostelium discoideum
. Journal of Bacteriology 257:368–374