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Armstrong W, Beckett PM. Experimental and modelling data contradict the idea of respiratory down-regulation in plant tissues at an internal [O2] substantially above the critical oxygen pressure for cytochrome oxidase. THE NEW PHYTOLOGIST 2011; 190:431-41. [PMID: 21118258 DOI: 10.1111/j.1469-8137.2010.03537.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
• Some recent data on O(2) scavenging by root segments showed a two-phase reduction in respiration rate starting at/above 21 kPa O(2) in the respirometer medium. The initial decline was attributed to a down-regulation of respiration, involving enzymes other than cytochrome oxidase, and interpreted as a means of conserving O(2). As this appeared to contradict earlier findings, we sought to clarify the position by mathematical modelling of the respirometer system. • The Fortran-based model accommodated the multicylindrical diffusive and respiratory characteristics of roots and the kinetics of the scavenging process. Output included moving images and data files of respiratory activity and [O(2)] from root centre to respirometer medium. • With respiration at any locus following a mitochondrial cytochrome oxidase O(2) dependence curve (the Michaelis-Menten constant K(m) = 0.0108 kPa; critical O(2) pressure, 1-2 kPa), the declining rate of O(2) consumption proved to be biphasic: an initial, long semi-linear part, reflecting the spread of severe hypoxia within the stele, followed by a short curvilinear fall, reflecting its extension through the pericycle and cortex. • We conclude that the initial respiratory decline in root respiration recently noted in respirometry studies is attributable to the spread of severe hypoxia from the root centre, rather than a conservation of O(2) by controlled down-regulation of respiration based on O(2) sensors.
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Affiliation(s)
- William Armstrong
- Department of Biological Sciences, University of Hull, Kingston upon Hull, UK.
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2
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Mason HRS, Righelato RC. Energetics of fungal growth: The effect of growth-limiting substrate on respiration of Penicillium chrysogenum. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/jctb.5020260308] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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3
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Mason HRS, Righelato RC. Energetics of fungal growth: The effect of growth-limiting substrate on respiration of Penicillium chrysogenum. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/jctb.5020260124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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4
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5
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Lund BM. Quantification of factors affecting the probability of development of pathogenic bacteria, in particularClostridium botulinum, in foods. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf01584183] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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6
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Ryan W, Parulekar SJ. Effects of culture conditions on plasmid stability and production of a plasmid-encoded protein in batch and continuous cultures of Escherichia coli JM103[pUC8]. Ann N Y Acad Sci 1990; 589:91-110. [PMID: 2192668 DOI: 10.1111/j.1749-6632.1990.tb24237.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- W Ryan
- Department of Chemical Engineering, Illinois Institute of Technology, Chicago 60616
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7
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Khosravi M, Ryan W, Webster DA, Stark BC. Variation of oxygen requirement with plasmid size in recombinant Escherichia coli. Plasmid 1990; 23:138-43. [PMID: 2194228 DOI: 10.1016/0147-619x(90)90032-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We have previously found an inverse relationship between certain cell growth parameters and plasmid size for a series of recombinant Escherichia coli strains containing pUC8 or one of a series of pUC8 recombinant derivatives. To extend these results we investigated whether there was a similar variation among our strains in oxygen requirement, which might be related to the differences in growth. During logarithmic growth in shake flasks, oxygen uptake by E. coli strain JM103 containing an 8.7-kb pUC8 derivative (pBS5) was 2.5 times that of JM103 harboring pUC8 (2.7 kb) and 7.5 times that of plasmid-free JM103. Supplementing the medium with acetate eliminated both the growth disadvantage of and the increased oxygen uptake by the strain harboring pBS5 compared with that containing pUC8. In all cases oxygen consumption decreased drastically as cells began and then continued into stationary phase, and no significant difference was seen among the three strains at these times. When the three strains were grown in a fermentor with continuous monitoring of oxygen levels, plasmid-free JM103 outgrew JM103 containing pUC8 or pBS5 at three levels of aeration. The latter two strains grew identically when aeration was high; their growth curves diverged, however, when aeration was low. In the fermentor experiments the point at which the growth of the three strains diverged was coincident with the point of oxygen depletion in the cultures.
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Affiliation(s)
- M Khosravi
- Department of Biology, Illinois Institute of Technology, Chicago 60616
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8
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Gélinas P, Fiset G, Leduy A, Goulet J. Effect of Growth Conditions and Trehalose Content on Cryotolerance of Bakers' Yeast in Frozen Doughs. Appl Environ Microbiol 1989; 55:2453-9. [PMID: 16348024 PMCID: PMC203104 DOI: 10.1128/aem.55.10.2453-2459.1989] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The cryotolerance in frozen doughs and in water suspensions of bakers' yeast (
Saccharomyces cerevisiae
) previously grown under various industrial conditions was evaluated on a laboratory scale. Fed-batch cultures were very superior to batch cultures, and strong aeration enhanced cryoresistance in both cases for freezing rates of 1 to 56°C min
−1
. Loss of cell viability in frozen dough or water was related to the duration of the dissolved-oxygen deficit during fed-batch growth. Strongly aerobic fed-batch cultures grown at a reduced average specific rate (μ = 0.088 h
−1
compared with 0.117 h
−1
) also showed greater trehalose synthesis and improved frozen-dough stability. Insufficient aeration (dissolved-oxygen deficit) and lower growth temperature (20°C instead of 30°C) decreased both fed-batch-grown yeast cryoresistance and trehalose content. Although trehalose had a cryoprotective effect in
S. cerevisiae
, its effect was neutralized by even a momentary lack of excess dissolved oxygen in the fed-batch growth medium.
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Affiliation(s)
- P Gélinas
- Lallemand Inc., Montreal, Quebec H1W 2N8, Canada, and Département de Sciences et Technologie des Aliments and Département de Génie Chimique, Université Laval, Sainte-Foy, Quebec G1K 7P4, Canada
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9
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10
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Gottschal JC, Szewzyk R. Growth of a facultative anaerobe under oxygen-limiting conditions in pure culture and in co-culture with a sulfate-reducing bacterium. FEMS Microbiol Lett 1985. [DOI: 10.1111/j.1574-6968.1985.tb01144.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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11
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Moes J, Griot M, Keller J, Heinzle E, Dunn IJ, Bourne JR. A microbial culture with oxygen-sensitive product distribution as a potential tool for characterizing bioreactor oxygen transport. Biotechnol Bioeng 1985; 27:482-9. [DOI: 10.1002/bit.260270413] [Citation(s) in RCA: 68] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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12
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El Hassan GA, Zablotowicz RM, Focht DD. Kinetics of Denitrifying Growth by Fast-Growing Cowpea Rhizobia. Appl Environ Microbiol 1985; 49:517-21. [PMID: 16346745 PMCID: PMC373541 DOI: 10.1128/aem.49.3.517-521.1985] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Two fast-growing strains of cowpea rhizobia (A26 and A28) were found to grow anaerobically at the expense of NO
3
−
, NO
2
−
, and N
2
O as terminal electron acceptors. The two major differences between aerobic and denitrifying growth were lower yield coefficients (
Y
) and higher saturation constants (
K
s
) with nitrogenous oxides as electron acceptors. When grown aerobically, A26 and A28 adhered to Monod kinetics, respectively, as follows:
K
s
, 3.4 and 3.8 μM;
Y
, 16.0 and 14.0 g · cells eq
−1
; μ
max
, 0.41 and 0.33 h
−1
. Yield coefficients for denitrifying growth ranged from 40 to 70% of those for aerobic growth. Only A26 adhered to Monod kinetics with respect to growth on all three nitrogenous oxides. The apparent
K
s
values were 41, 270, and 460 μM for nitrous oxide, nitrate, and nitrite, respectively; the
K
s
for A28 grown on nitrate was 250 μM. The results are kinetically and thermodynamically consistent in explaining why O
2
is the preferred electron acceptor. Although no definitive conclusions could be drawn regarding preferential utilization of nitrogenous oxides, nitrite was inhibitory to both strains and effected slower growth. However, growth rates were identical (μ
max
, 0.41 h
−1
) when A26 was grown with either O
2
or NO
3
−
as an electron acceptor and were only slightly reduced when A28 was grown with NO
3
−
(0.25 h
−1
) as opposed to O
2
(0.33 h
−1
).
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Affiliation(s)
- G A El Hassan
- Department of Soil and Environmental Sciences, University of California, Riverside, Riverside, California 92521
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13
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14
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The effect of redox potential, and its interaction with sodium chloride concentration, on the probability of growth of Clostridium botulinum type E from spore inocula. Food Microbiol 1984. [DOI: 10.1016/0740-0020(84)90009-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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Wilde E, Schlegel HG. Oxygen tolerance of strictly aerobic hydrogen-oxidizing bacteria. Antonie Van Leeuwenhoek 1982; 48:131-43. [PMID: 7049081 DOI: 10.1007/bf00405198] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Growth of various bacteria, especially aerobic hydrogen-oxidizing bacteria, in the presence of 2 to 100% (v/v) oxygen in the gas atmosphere was evaluated. The bacterial strains included Alcaligenes eutrophus, A. paradoxus, Aquaspirillum autotrophicum, Arthrobacter spec. strain 11 X, Escherichia coli, Arthrobacter globiformis, Nocardia opaca, N. autotrophica, Paracoccus denitrificans, Pseudomonas facilis, P. putida, and Xanthobacter autotrophicus. Under heterotrophic conditions with fructose or gluconate as substrates neither colony formation on solid medium nor the growth rates in liquid media were drastically impaired by up to 100% oxygen. In contrast, autotrophic growth--with hydrogen, carbon dioxide and up to 80% oxygen in the gas atmosphere--was strongly depressed by high oxygen concentrations. However, only the growth rate, not the viability of the cells, was decreased. Growth retardation was accompanied by a decrease of hydrogenase activity.
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16
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Regulation of glucose metabolism in bacterial systems. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 1982. [DOI: 10.1007/3540116982_1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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17
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Páca J, Grégr V. Growth characteristics of Candida utilis in a multistage culture system. Enzyme Microb Technol 1979. [DOI: 10.1016/0141-0229(79)90106-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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John P, Whatley FR. The bioenergetics of Paracoccus denitrificans. BIOCHIMICA ET BIOPHYSICA ACTA 1977; 463:129-53. [PMID: 20140 DOI: 10.1016/0304-4173(77)90006-4] [Citation(s) in RCA: 119] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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19
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Martin JF, McDaniel LE. Production of polyene macrolide antibiotics. ADVANCES IN APPLIED MICROBIOLOGY 1977; 21:1-52. [PMID: 322452 DOI: 10.1016/s0065-2164(08)70037-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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20
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Jurtshuk P, McQuitty DN. Use of a quantitative oxidase test for characterizing oxidative metabolism in bacteria. Appl Environ Microbiol 1976; 31:668-79. [PMID: 1275489 PMCID: PMC291174 DOI: 10.1128/aem.31.5.668-679.1976] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
It was possible to quantitate the terminal oxidase(s) reaction using bacterial resting-cell suspensions and demonstrate the usefulness of this reaction for taxonomic purposes. Resting-cell suspensions of physiologically diverse bacteria were examined for their capabilities of oxidizing N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) using a manometric assay. For organisms having this capability, it was possible to calculate the conventional TMPD oxidase Q(O2) value (microliters of O2 consumed per hour per milligram [dry weight]). All cultures were grown heterotrophically at 30 C, under identical nutritional conditions, and were harvested at the late-logarithmic growth phase. The TMPD oxidase Q(O2) values showed perfect correlation with the Kovacs oxidase test and, in addition, it was possible to define quantitatively that point which separated oxidase-positive from oxidase-negative bacteria. Oxidase-negative bacteria exhibited a TMPD oxidase Q(O2) value (after correcting for the endogenous by substraction) of less than or equal 33 and had an uncorrected TMPD/endogenous ratio of less than or equal 5. The TMPD oxidase Q(O2) values were also correlated with the data obtained for the Hugh-Leifson Oxferm test. In general, bacteria that exhibited a respiratory mechanism had high TMPD oxidase values, whereas fermentative organsims had low TMPD oxidase activity. All exceptions to this are noted. This quantitative study also demonstrated that organisms that (i) lack a type c cytochrome, or (ii) lack a cytochrome-containing electron transport system, like the lactic acid bacteria, exhibited low or negligible TMPD oxidase Q(O2) values. From the 79 bacterial species (36 genera) examined, it appears that this quantitative oxidase test has taxonomic value that can differentiate the oxidative relationships between bacteria at the subspecies, species, and genera levels.
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21
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22
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Grady CPL, Findley PL, Muck RE. Effects of growth conditions on the oxygen equivalence of microbial cells. Biotechnol Bioeng 1975. [DOI: 10.1002/bit.260170607] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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24
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Focht DD, Chang AC. Nitrification and denitrification processes related to waste water treatment. ADVANCES IN APPLIED MICROBIOLOGY 1975; 19:153-86. [PMID: 242195 DOI: 10.1016/s0065-2164(08)70428-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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