Chlorococcum

About: Chlorococcum is a research topic. Over the lifetime, 268 publications have been published within this topic receiving 7317 citations.

Descriptions of new edaphic and aquatic species of Chlorococcum Meneghini (Chlorococcales)

Abstract: A detailed study of 32 algal cultures, tentatively identified as Chlorococcum at the time of initial isolation, resulted in the description of seven species of Chlorococcum new to science. Five of the new species are reported as edaphic and two as aquatic forms. Although previously described species were isolated from soil, aquatic isolates of Chlorococcum rugosum and Chlorococcum minutum were identified in this study.

The growth of microalgae Chlorococcum sp. isolated from Ampenan estuary of Lombok Island in Walne's medium

Abstract: Microalgae, also known as plankton, are one of the aquatic organisms which conduct photosynthesis similar to higher plants. Microalgae can live in any aquatic environment and are relatively easy to culture. There have been many studies that have shown the commercial applications of microalgae which have been continuously driving the development of microalgae-related research for decades. As for this research, the aim was to determine the growth phase of microalgae Chlorococcum sp isolated from Ampenan Beach estuary of Lombok Island. In this study, isolate from solid medium obtained from previous research were transferred to liquid medium enriched with Walne’s nutrition. The conditions of the culture were: room temperature (25 °C), light intensity of 2000-3000 lux, photo period of light:dark (24:0) hours, pH range 7-8, 24 hours of aeration, and culture under sterile environment. Based on every day observation of cell numbers, it is known that Chlorococcum sp began to enter the death phase on the fifth day so that the observations were only carried out for seven consecutive days. The initial cell number was 187,500 cells/ml and the optimum cell numbers (on the fourth day) was 331,250 cells/ml. In conclusion, the optimum growth of microalgae occurred on the fourth day from the first day of culture and it began to enter its death phase on the fifth day.

Development of Red Pigmentation in Chlorococcum

Abstract: The concentration of the red pigmentation in Chlorococcum wimmeri is primarily a function of light intensity, although it is enhanced by near red illumination and also influenced by carbon dioxide concentration. It is independent of cell age and of nitrate content, oxygen, and pH of the growth medium. The red pigmentation is composed of astacin, esterified astaxanthin, an unknown ester, and an allied carotenoid. Chlorococcum wimmeri possesses, on a chlorophyll basis, higher rates of photo­ synthesis and the quinone Hill reaction than Chlorella pyrenoidosa under the same conditions.

A Spin Filter system for the study of algal interactions

Abstract: In Spin Filter flasks interacting populations of algae can be grown in such a way that they are kept separate spatially but remain in close contact chemically. The rotating filter unit of the flasks is a solution to the clogging problem. In experiments with this system Chlamydomonas globosa was always inhibited slightly by Chlorococcum ellipsoideum, but Chlorococcum was only inhibited by Chlamydomonas when the latter had an initial advantage.