necrogenousadj.

Brit.

/nᵻˈkrɒdʒᵻnəs/, U.S.

/nəˈkrɑdʒənəs/

Origin: Formed within English, by compounding. Etymons: necro- comb. form, -genous comb. form.

Etymology: < necro- comb. form + -genous comb. form.In sense 1 after French nécrogène (A. P. de Candolle Physiol. végétale (1832) III. 1403). In sense 2 after German nekrogen (E. Gäumann Pflanzliche Infektionslehre (1946) iv. 345).

Botany.

†1. Designating a fungus that grows on dead or dying plant tissue. Obsolete. rare.Apparently only attested in dictionaries or glossaries.

ΚΠ

1857 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Necrogenus, applied by De Candolle to cryptogamious, parasitic intestinal plants which attack vegetables ready to die..or which grow upon organs already dead..: necrogenous.

2. Designating a reaction to a plant pathogen in which there is necrosis of the cells surrounding the site of infection, isolating the pathogen and preventing its further spread. Now rare.

ΚΠ

1946 Nature 3 Aug. 147/2 Active defence mechanisms are next considered under the headings of..necrogenous or hypersensitive reaction (for example, varieties of wheat immune to rust), [etc.].

1950 W. B. Brierley tr. E. Gäumann Princ. Plant Infection iv. 290 New hyperergic reactions of another character now come into operation, and these will be considered together as a group, the necrogenous or aborting defence reactions.

1978 New Phytologist 81 316 The necrosis typical of A. tragopogonis infections may be either the result of unsuccessful necrogenous host defence mechanisms or a consequence of the dehydration of infected tissues.

This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022).

单词	necrogenous
释义	necrogenousadj. Brit. /nᵻˈkrɒdʒᵻnəs/, U.S. /nəˈkrɑdʒənəs/ Origin: Formed within English, by compounding. Etymons: necro- comb. form, -genous comb. form. Etymology: < necro- comb. form + -genous comb. form.In sense 1 after French nécrogène (A. P. de Candolle Physiol. végétale (1832) III. 1403). In sense 2 after German nekrogen (E. Gäumann Pflanzliche Infektionslehre (1946) iv. 345). Botany. †1. Designating a fungus that grows on dead or dying plant tissue. Obsolete. rare.Apparently only attested in dictionaries or glossaries. ΚΠ 1857 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Necrogenus, applied by De Candolle to cryptogamious, parasitic intestinal plants which attack vegetables ready to die..or which grow upon organs already dead..: necrogenous. 2. Designating a reaction to a plant pathogen in which there is necrosis of the cells surrounding the site of infection, isolating the pathogen and preventing its further spread. Now rare. ΚΠ 1946 Nature 3 Aug. 147/2 Active defence mechanisms are next considered under the headings of..necrogenous or hypersensitive reaction (for example, varieties of wheat immune to rust), [etc.]. 1950 W. B. Brierley tr. E. Gäumann Princ. Plant Infection iv. 290 New hyperergic reactions of another character now come into operation, and these will be considered together as a group, the necrogenous or aborting defence reactions. 1978 New Phytologist 81 316 The necrosis typical of A. tragopogonis infections may be either the result of unsuccessful necrogenous host defence mechanisms or a consequence of the dehydration of infected tissues. This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022). < adj.1857
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