Sc. Agrawal et Uk. Sharma, CHEMICAL AND BIOLOGICAL PROPERTIES OF CULTURE FILTRATES OF WESTIELLOPSIS-PROLIFICA AND CHAETOPHORA-ATTENUATA, Israel journal of plant sciences, 44(1), 1996, pp. 43-48
Westiellopsis prolifica Janet and Chaetophora attenunta Hazen cultures
released sugars (glucose, fructose, and sucrose), organic acids (oxal
oacetic acid and oxalic acid), amino acids, and protein. W. prolifica
cultures released the amino acids glycine, serine, cystine, glutamic a
cid, aspartic acid, and cc-alanine, while C. attenuata cultures releas
ed glycine, serine, aspartic acid, and cr-alanine. W. prolifica and C.
attenuata cultures of all ages released more extracellular protein th
an total free amino acids. Cultures of C. attenuata released more prot
ein than cultures of the same age of W. prolifica. The filtrates from
old cultures of W. prolifica and C. attenunta decreased the total chlo
rophyll content of all algae tested, totally suppressed conjugation in
Spirogyra decimina and zoospore formation in C. attenuata, and drasti
cally decreased spore germination in W. prolifica, thus producing stre
ssful conditions affecting the growth and reproduction of these and ot
her algae.