The content of free amino acids in sea and fresh-water Chlorella cells under saline conditions in the presence of the inhibitors of glycolate pathway

Kalinkina, L.G.; Naumova, T.G.

Fiziologiya Rastenii 39(3): 559-569

1992


ISSN/ISBN: 0038-5719
Accession: 009551443

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Abstract
The action of the inhibitors of glycolate pathway was investigated in the cells of Chlorella pyrenoidosa Pringsh. 82T and C. stigmatophora Butcher exposed to saline conditions. The fresh-water chlorella contained less free amino acids. The salt stress increased the total pool of free amino acids in both chlorella forms, mainly proline content. The inhibition of glycolate pathway in the absence of NaCl has promoted the accumulation of total amino acids in the fresh-water chlorella and declined it in a sea form. The inhibition of glycolate pathway under saline conditions has resulted in the reduction of the free amino acid pool during the period of cultivation of sea alga while in the fresh-water alga this effect was evident only after longterm cultivation. The glycolate pathway affected the content of amino acids playing the role of its metabolites or NH-2-donors namely glycine, serine, glutamate, glutamine, alanine, as well as the content of amino acids not related to glycolate pathway, i.e. valine, citrulline, leucine, lysine, gamma-aminobutyric acid, isoleucine and others.