Abstract
AbstractFilamentous green algae (FGA) frequently forms dense mats which can be either mono- or polyspecies. While various defense mechanisms of competition in algae are known, little is known about the interactions between different species of FGA. An experiment in controlled laboratory conditions was conducted to gather data on the changes in amino acids (AA) concentrations in FGA species in the presence of exudates from different other species. The aim of the present study was to identify the AA whose concentrations showed significant changes and to assess if the changes could be adaptation to stress conditions. The major constituents of the AA pool inCladophora glomerata, C. fractaandRhizocloniumsp. were Glutamic acid (Glu), Aspartic acid (Asp) and Leucine (Leu). In response to chemical stress, that is the increasing presence of exudates, a significant increase in the concentrations Proline (Pro) and Tryptophan (Trp) was noted. The increase in Proline levels was observed inC. fractaandRhizocloniumin response to chemical stress induced byC. glomerataexudates. As the concentration of exudates increased in the medium, there was a progressive shift in the pattern of AA group in FGA.
Highlights
Filamentous green algae (FGA) frequently forms dense mats which can be either mono- or polyspecies
The morphology of algae taxa was studied carefully, and the taxa were identified as C. glomerata, C. fracta and Rhizoclonium sp. classified as Order: Cladophorales, Class: Ulvophyceae and Phylum: Chlorophyta
The results indicate a gradual increase in the Impact of exudates extracted from C. glomerata on C. fracta amino acids (AA) production
Summary
Abstract: Filamentous green algae (FGA) frequently forms dense mats which can be either mono- or polyspecies. While various defense mechanisms of competition in algae are known, little is known about the interactions between different species of FGA. An experiment in controlled laboratory conditions was conducted to gather data on the changes in amino acids (AA) concentrations in FGA species in the presence of exudates from different other species. The aim of the present study was to identify the AA whose concentrations showed significant changes and to assess if the changes could be adaptation to stress conditions. The major constituents of the AA pool in Cladophora glomerata, C. fracta and Rhizoclonium sp. In response to chemical stress, that is the increasing presence of exudates, a significant increase in the concentrations Proline (Pro) and Tryptophan (Trp) was noted. The increase in Proline levels was observed in C. fracta and Rhizoclonium in response to chemical stress induced by C. glomerata exudates. As the concentration of exudates increased in the medium, there was a progressive shift in the pattern of AA group in FGA
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