Genetic and Environmental Control of Glycolic Acid Oxidase Activity in Ecotypic Populations of Typha Latifolia

McNaughton, S. J.

doi:10.1002/j.1537-2197.1969.tb07504.x

Cited by 18 publications

(5 citation statements)

References 26 publications

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“…Chromosome numbers of 2n :30 have been reported (Smith 1967 (McNaughton 1966(McNaughton , 1969(McNaughton , 1912(McNaughton , 1973(McNaughton , l9l4, 1975McNaughton et al 1974a Aside from climatic adaptation, ecotypic variation has been correlated with salinity (McNaughton 1966) and the frequency of habitat disturbance (Grace and Wetzel l98la). Typha latifolia has been found to be highly tolerant of heavy metal pollution and thermal pollution but this ability has been found to result entirely from phenotypic plasticity (McNaughton et al 1974b;Jones et al 1979).…”

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confidence: 99%

THE BIOLOGY OF CANADIAN WEEDS.: 73. Typha latifolia L., Typha angustifolia L. and Typha xglauca Godr.

Grace¹,

Harrison²

1986

Can. J. Plant Sci.

171

132

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confidence: 99%

THE BIOLOGY OF CANADIAN WEEDS.: 73. Typha latifolia L., Typha angustifolia L. and Typha xglauca Godr.

Grace¹,

Harrison²

1986

Can. J. Plant Sci.

171

132

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“…A brief report of the effect of oxygen upon the assimilatory efficiency of Typha angustifolia (12) suggests that this high efficiency may be associated with the ribulose-1, 5-diP pathway. Studies of glycolate oxidase level have also demonstrated a high photorespiratory capability in Typha latifolia (21). The experiments reported here were designed to: (a) determine photosynthetic rates of Typha directly by infrared gas analysis, (b) establish the nature of the carboxylation reaction, and (c) estimate the proportion of the carbon assimilated which passes through the glycolate oxidase reaction.…”

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Photosynthesis and Photorespiration in Typha latifolia

McNaughton

Fullem

1970

Plant Physiol.

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NaH'4CO3 (105 Cpm) to 1.3 ml of the enzyme preparation. At intervals, 0.4-ml samples were removed and acidified with 0.1 ml of 6 N acetic acid. Controls consisted of a zero time sample that was acidified immediately upon mixing the reaction components, and a reaction mixture lacking ribulose-1, 5-diP which was acidified at the end of the experimental period. The same enzyme preparation procedure was used for phosphopyruvate carboxylase except that dithioerythritol was sometimes substituted for reduced glutathione to provide an alternative test for sulfhydryl protection. The assay system for this enzyme, after Slack and Hatch (25), contained 1.55 ,umoles of phosphopyruvate and 15 ,umoles of sodium glutamate in substitution for the ribulose-1,5-diP used above. Controls were the same. For the assay of glycolate oxidase activity, leaves were homogenized in 0.067 M phosphate buffer (pH 7.8) and filtered through four layers of 60 mesh cheesecloth. This homogenate was used directly in a polarographic assay (10) with the Clark electrode. The reaction was initiated by adding 10 .moles of sodium glycolate in 0.2 ml of the phosphate buffer to 2.8 ml of the enzyme preparation. Controls were samples to which no glycolate was added. Addition of the enzyme cofactor, flavin mononucleotide, was not found to be stimulatory, and this was omitted from the assay system. Reagents were from Sigma.For "4CO0 assimilation experiments, leaves were preilluminated in 2 X 106 ergs cm-2 sec-l of light with their base in distilled water or a glycolate oxidase inhibitor, 0.01 M a-hydroxypyridinemethanesulfonic acid (Aldrich), for 30 min prior to release of "4CO2 by the acidification of a bicarbonate solution. Carbon dioxide concentration was 370 ,ul liter-' after addition of bicarbonate, to eliminate artifacts arising from high CO2 concentrations. Following 10 min of photosynthesis with water or 20 min with the inhibitor, the leaves were killed with boiling 80%-ethanol. In the controls, 1.8 AC of "CO, were used. In the experiments with inhibitor, 2.02 ,C of "CO2 were used. The different time periods and specific radioactivities of "CO2 were used to assure that approximately the same amount of radioactivity would be recovered from chromatograms of both treatments without overloading with plant extracts. Total cpm recovered from chromatograms per g of leaf extracted were 43,200 + 21,600 (0.95 confidence interval) for the water controls and 53,600 + 8,300 for experiments in inhibitor. For

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“…C3 metabolism and photorespiration have been demonstrated in the cattails Typha anqustifolia and T. latifolia (Forrester, et al, 1966b;McNaughton, 1966McNaughton, , 1969McNaughton and Fullem, 1969). The C4 photosynthetic system thus likely would be of adaptive value in many emergent hydrophytes, particularly in regions of high temperature and high light intensity, and also in situations where salt content of the environment adversely affects internal C0 2 and water balance (Bjorkman, 1971;Slatyer, 1971)• In the latter context, Spartina, the dominant plant of the salt marshes of the east coast of the United States, appears to be a C4 plant (Krenzer and Moss, 1969)-Also evidently of C4 type is a highly productive floating species of Alternanthera (C. C. Black, personal commun.)…”

Section: Photorespirationmentioning

confidence: 99%

Photorespiration and release of organic carbon in submersed aquatic vascular plants

Hough

1973

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Genetic and Environmental Control of Glycolic Acid Oxidase Activity in Ecotypic Populations of Typha Latifolia

Cited by 18 publications

References 26 publications

THE BIOLOGY OF CANADIAN WEEDS.: 73. Typha latifolia L., Typha angustifolia L. and Typha xglauca Godr.

THE BIOLOGY OF CANADIAN WEEDS.: 73. Typha latifolia L., Typha angustifolia L. and Typha xglauca Godr.

Photosynthesis and Photorespiration in Typha latifolia

Photorespiration and release of organic carbon in submersed aquatic vascular plants

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