Also found in: Medical, Encyclopedia, Wikipedia.
Related to heterothallic: homothallic


Reproducing by cross-fertilization between individuals of different mating types. Used of certain fungi and algae.

[hetero- + Greek thallos, young shoot; see thallo- + -ic.]

het′er·o·thal′lism n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Botany) (of some algae and fungi) having male and female reproductive organs on different thalli
2. (Botany) (of some fungi) having sexual reproduction that occurs only between two self-sterile mycelia
[C20: from hetero- + Greek thallos green shoot, young twig]
ˌheteroˈthallism, ˌheteroˈthally n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌhɛt ər əˈθæl ɪk)

having mycelia of two unlike types, both of which must participate in the sexual process.
[1900–05; hetero- + thall(us) + -ic]
het`er•o•thal′lism, n.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Mentioned in ?
References in periodicals archive ?
Sexual structures produced by Phytophthora species after mating are called oospores and are produced by a single individual in homothallic species, or when two individuals bearing different mating types come into contact in heterothallic species.
Aspergillus flavus is considered functionally heterothallic, and it is uncommon for strains to contain both MAT genes.
Mycosphaerella rabiei Kovacheski), belongs to bipolar heterothallic ascomycete which is involved in production of pseudothecia upon over wintered filed crop residues.
The isolate is heterothallic forming aplerotic oospores, which measured 19.53 to 30.08 [micro]m in diameter (average 25.04 [micro]m) and amphigynous antheridia when paired with the mating type A1.
Of the several fungal diseases that afflict the finger millet crop, blast caused by the heterothallic, filamentous fungus Magnaporthe grisea (anamorph- Pyricularia grisea (Cooke) Sacc.) is not only widely distributed in almost all the finger millet growing regions of the world, but also is the most destructive disease (2).
continentalis, and Metschnikowia hibisci, new heterothallic haploid yeasts from ephemeral flowers and associated insects.
The latter two species are heterothallic thus did not produce oospores and or sexual structures in single cultures.