Scenedesmus species

A Anaerobic adaptation was obtained by flushing the cells with argon. At indicated time points, samples were taken to measure the in vitro Fk-ase activity of C. reinhardtii (box), S. obliquus (circle), C. fusca (triangle), C. moewusii (diamond). While the activities of both Scenedesmus species are comparative low, the in vitro H -production rate of anaerobically induced C. moewusii cultures is 2 times higher than the activity of induced C. reinhardtii cultures. B Northern blots with equal amounts of total RNA isolated from an anaerobically adapted culture (2 h) and an uninduced reference culture (0 h) of C. moewusii. The upper blot was incubated with a RNA sample of the 3 UTR of the hydA 1 cDNA, while the lower blot was incubated with a RNA sample generated of the cDNA from the constitutively expressed sedoheptulose 1,7-bisphosphatasegene. 

Chlorophycean species [Proeschold et al., 2001], the HydA proteins of C. moewusii, C. reinhardtii and S. obliquus form 3 different branches which possess, one to the other, a rather similar evolutionary distance. The three different HydA branches reflect the membership to three distinct phylogenetic clades ( Moewusii -clade, Reinhardtii -clade, Scenedesmus -clade) which can be found in completely different regions of the chlorophycean phylogenetic tree. 

Green algae The planktonic algal cells of order Chlorococcales include many prolific and pervasive species, including Chlorococcus humicola, Pediastrum, Scenedesmus, Coelastrum, and Micractinium sp. These thrive in warm summers and produce gelatinous sheaths under areas of dripping water. 

Culture of Scenedesmus phytoplankton Scenedesmus can be obtained from culture collections or scientific supply companies. Many species in the genus Scenedesmus, including S. acutus, S. subspicatus, and many but not all clones of S. obliquus will exhibit colony induction. 

Organisms Freshwater species Selenastrum capricornutum, Scenedesmus subspicatus, Chlorella vulgaris, Microcystis aeruginosa Anabaena flos-aqme, and Navicula pelliculosa Saltwater species Skeletonema costatum, Thalassiosira pseudonana, and Dunaliella Tertiolecta... 

This effect was significant only after > 12 h irradiation with artificial UV-B radiation (max. at 312 nm). The authors hypothesized that changes in both mucous secretion and in thickness of the cell wall were responsible for the lower digestibility. In a later study, other species of phytoplankton Chlamydomonas reinhardtii, Scenedesmus acutus, S. subspicatus, and Cryptomonas pyrenoidifera) cultured in the presence of a high UV-B dose were assessed for qualitative and quantitative cell changes and their effect on life-history parameters of D. pulex... 

The peroxidative response against herbicides can be different in certain species. For example, we find tolerance against oxyfluorfen (20). As shown in Figure 3, the microalgae Scenedesmus... 

Fig 4 10 Proposed structures for (a) cutan (from Agave americana n is large but unknown, and the central carbonyl link has yet to be confirmed after McKinney et al. 1996) and (b) algaenan (from freshwater species Tetraedron minimum, Scenedesmus communis and Pediastmm boryanum x + y = 27, 29, 31 andx + z = 28, 30, 32 after Blokker et al. 1998). 

The ubiquitous nature of proline-containing peptides results in the common appearance of perhydro-l,4-dioxopyrrolo[l,2-a]pyrazines as a result of metabolic processes, particularly of microorganisms. For example, the diketopiperazines 152 were found to be metabolic products of the algae species Scenedesmus sp. These compounds have also been found in cultures of Sfreptomyces. " Glycyl-L-prolyl diketopiperazine has recently been isolated from the small sea animal Luidia clathrata The anhydrides 152 were not directly formed from the constituent amino... 

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