prototrophn.

Brit.

/ˈprəʊtə(ʊ)ˌtrəʊf/,

/ˈprəʊtə(ʊ)ˌtrɒf/, U.S.

/ˈproʊdəˌtrɑf/

Origin: Formed within English, by compounding. Etymons: proto- comb. form, -troph comb. form.

Etymology: < proto- comb. form + -troph comb. form. Compare prototrophic adj. 2.

Biology.

A prototrophic microorganism (see prototrophic adj. 2).

ΘΚΠ

the world > life > biology > balance of nature > organisms in relation to habitat > [noun]

colonist1839

benthos1891

land form1897

heterotroph1900

autotroph1901

epibenthos1902

specialist1902

microaerophile1903

nitrifier1903

consumer1904

nitrogen fixer1904

producer1904

indicator1906

psychrophile1906

thermophil1909

sulphuretum1925

influent1926

halobiont1928

halophile1928

mesophile1928

oligosaprobe1931

saprobe1932

eurytope1938

stenotope1938

photoautotroph1939

chemoautotroph1943

prototroph1946

mixotrophy1948

chemolithoautotroph1949

auxotroph1950

chemoheterotroph1951

chemoorganotroph1953

chemolithotroph1955

chemotroph1958

osmophile1961

psychrotroph1963

saprotroph1963

generalist1964

opportunist1967

cryophile1970

1946 F. J. Ryan & J. Lederberg in Proc. National Acad. Sci. U.S.A. 32 172 We propose to designate as a prototroph any strain which has the nutritional requirements of the ‘wild type’ from which it was derived irrespective of how it became prototrophic.

1958 Heredity 12 269 Bursts of white, prototrophic cells frequently arise from colonies of certain strains of red, adenine-requiring yeasts. The occurrence of prototrophs appears to result from back-mutation at the locus for adenine requirement.

1975 J. B. Jenkins Genetics viii. 311 Prototrophs are cells that can grow on minimal medium.

1998 Jrnl. Biol. Chem. 273 5155 This biotin prototroph required exogenously supplied biotin to exhibit detectable amounts of PYC [= pyruvate carboxylase] activity.

Derivatives

ˈprototrophy n. the state or condition of being a prototroph.

ΘΚΠ

the world > life > biology > balance of nature > organisms in relation to habitat > [noun] > conditions of

plasticity1858

modification1875

tolerance1898

autotrophy1900

heterotrophism1900

sympatry1904

heterotrophy1930

zootrophy1930

chemoautotrophism1943

chemolithotrophy1947

chemoorganotrophy1947

chemotrophy1947

chemoautotrophy1949

prototrophy1949

auxotrophy1953

photoautotrophy1961

photoheterotrophy1961

opportunism1967

chemoheterotrophy1972

chemolithoautotrophy1976

psychrotolerance1977

1949 Proc. National Acad. Sci. U.S.A. 31 181 Lac + prototrophy [mutants] were streaked out on EMB-lactose.

1975 Nature 26 June 736/2 It was impossible to grow the population for long periods without reversion to prototrophy.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	prototroph
释义	prototrophn. Brit. /ˈprəʊtə(ʊ)ˌtrəʊf/, /ˈprəʊtə(ʊ)ˌtrɒf/, U.S. /ˈproʊdəˌtrɑf/ Origin: Formed within English, by compounding. Etymons: proto- comb. form, -troph comb. form. Etymology: < proto- comb. form + -troph comb. form. Compare prototrophic adj. 2. Biology. A prototrophic microorganism (see prototrophic adj. 2). ΘΚΠ the world > life > biology > balance of nature > organisms in relation to habitat > [noun] colonist1839 benthos1891 land form1897 heterotroph1900 autotroph1901 epibenthos1902 specialist1902 microaerophile1903 nitrifier1903 consumer1904 nitrogen fixer1904 producer1904 indicator1906 psychrophile1906 thermophil1909 sulphuretum1925 influent1926 halobiont1928 halophile1928 mesophile1928 oligosaprobe1931 saprobe1932 eurytope1938 stenotope1938 photoautotroph1939 chemoautotroph1943 prototroph1946 mixotrophy1948 chemolithoautotroph1949 auxotroph1950 chemoheterotroph1951 chemoorganotroph1953 chemolithotroph1955 chemotroph1958 osmophile1961 psychrotroph1963 saprotroph1963 generalist1964 opportunist1967 cryophile1970 1946 F. J. Ryan & J. Lederberg in Proc. National Acad. Sci. U.S.A. 32 172 We propose to designate as a prototroph any strain which has the nutritional requirements of the ‘wild type’ from which it was derived irrespective of how it became prototrophic. 1958 Heredity 12 269 Bursts of white, prototrophic cells frequently arise from colonies of certain strains of red, adenine-requiring yeasts. The occurrence of prototrophs appears to result from back-mutation at the locus for adenine requirement. 1975 J. B. Jenkins Genetics viii. 311 Prototrophs are cells that can grow on minimal medium. 1998 Jrnl. Biol. Chem. 273 5155 This biotin prototroph required exogenously supplied biotin to exhibit detectable amounts of PYC [= pyruvate carboxylase] activity. Derivatives ˈprototrophy n. the state or condition of being a prototroph. ΘΚΠ the world > life > biology > balance of nature > organisms in relation to habitat > [noun] > conditions of plasticity1858 modification1875 tolerance1898 autotrophy1900 heterotrophism1900 sympatry1904 heterotrophy1930 zootrophy1930 chemoautotrophism1943 chemolithotrophy1947 chemoorganotrophy1947 chemotrophy1947 chemoautotrophy1949 prototrophy1949 auxotrophy1953 photoautotrophy1961 photoheterotrophy1961 opportunism1967 chemoheterotrophy1972 chemolithoautotrophy1976 psychrotolerance1977 1949 Proc. National Acad. Sci. U.S.A. 31 181 Lac + prototrophy [mutants] were streaked out on EMB-lactose. 1975 Nature 26 June 736/2 It was impossible to grow the population for long periods without reversion to prototrophy. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1946
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