Glycolate Excretion &amp; Uptake by Chlorella

Miller, Ricarda; Meyer, CP; Tanner, Howard A.

doi:10.1104/pp.38.2.184

Cited by 35 publications

(13 citation statements)

References 5 publications

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“…conditions was first reported by ToLBERT ZILL (15). Chiarella has been found to be able to reassimilate excreted glycolate (15,16,17). On the other hand, beneficial effects of glycolate on the growth of Chlorella spp (16,18) 28 and on the phosphate uptake by Ankistrodesmus (19) have been reported.…”

Section: Discussionmentioning

confidence: 95%

Assimilation of ammonia, nitrate, and urea byChlorella ellipsoidea

Okuda

Ida

1966

Soil Science and Plant Nutrition

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Section: Discussionmentioning

confidence: 95%

Assimilation of ammonia, nitrate, and urea byChlorella ellipsoidea

Okuda

Ida

1966

Soil Science and Plant Nutrition

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“…There is evidence, however, that phytoplankton in cultures excrete a variety of organic substances during, or at the end, of phases of exponential growth (271)(272)(273)(274)(275)(276)(277) and this has been dem onstrated with phytoplankton in nature (278)(279)(280)(281). Hellebust (282), in par ticular, has shown that a wide variety of recently photosynthesized materials can be excreted by marine phytoplankton.…”

Section: The Production Of Dissolved Organic Matter and Its Subsequenmentioning

confidence: 99%

Phytoplankton and Marine Primary Production

Strickland¹

1965

Annu. Rev. Microbiol.

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“…Under certain conditions, a number of green algae excrete a large proportion of photosynthetically fixed CO2 as glycolate (10,14,(17)(18)(19)20). In all cases where glycolate excretion has been found, the cells have been grown on high levels of CO2 (0.2-5%) followed by measurement of glycolate excretion at lower CO2 levels and higher light intensities.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Control of Glycolate Excretion in Chlorella

Colman

Miller²,

Grodzinski³

1974

Plant Physiol.

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Chlorella pyrenoidosa cells grown on 5% C02 excreted glycolate when incubated in light with 10 mM bicarbonate, but excreted no glycolate under the same conditions when they were maintained on air for 7 hours prior to the assay. Incubation of 5% C02-grown and air-grown cells with 10 mM isonicotinyl hydrazide or 10 mM a-hydroxypyridinemethane sulfonate during the assay stimulated the excretion of glycolate by C02-grown cells severalfold that of air-grown cells.Adaptation of C02-grown Chlorella to growth on air did not affect the levels of glycolate dehydrogenase in the cells and did not affect the rate of dark oxidation and metabolism of exogeneous "4C-glycolate by the cells. These results indicate that the lack of glycolate excretion by air-grown or air-adapted cells of Chlorella cannot be explained by a concomitant change in the level of glycolate dehydrogenase.Under certain conditions, a number of green algae excrete a large proportion of photosynthetically fixed CO2 as glycolate (10,14,(17)(18)(19)20). In all cases where glycolate excretion has been found, the cells have been grown on high levels of CO2 (0.2-5%) followed by measurement of glycolate excretion at lower CO2 levels and higher light intensities. For instance, Watt and Fogg (21) showed that Chlorella pyrenoidosa cells grown on air rather than CO2-enriched air failed to excrete glycolate under assay conditions where high C02-grown cells excreted large amounts.Nelson and Tolbert (15) were able to convert Chlamydomonas reinhardtii cells, grown on 1% C02 in air and having a high rate of glycolate excretion under assay conditions of 6.5 mM bicarbonate in the light, to cells incapable of excreting glycolate under these same conditions. This conversion was accomplished by bubbling the 1% CO2-grown cells with air for 20 hr preceding the measurement of the excretion rate. During the aeration period, they reported an increase in the level of glycolate-DCIP2 oxidoreductase activity concomitant with the decrease in the glycolate excretion rate and suggested that these two events were causally related. Similarly, Codd et al. (4) have shown that Chlamydomonas, Euglena, and Chlorella, grown on 5% CO2, have lower levels of glycolate-DCIP oxidoreductase than the same algae grown on air alone.However, Cooksey (5) has demonstrated that the level of the

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Glycolate Excretion & Uptake by Chlorella

Cited by 35 publications

References 5 publications

Assimilation of ammonia, nitrate, and urea byChlorella ellipsoidea

Assimilation of ammonia, nitrate, and urea byChlorella ellipsoidea

Phytoplankton and Marine Primary Production

A Study of the Control of Glycolate Excretion in Chlorella

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