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Gardner, D. E. 1994. Unusual cytology of some species of rusts from Hawaii. Abstracts, 5th International Mycological Congress, Vancouver, B. C., Canada. 69.
ABSTRACT
Thirteen rust fungi are currently considered endemic to Hawaii, all having evolved on endemic hosts in isolation from other species. Teliospores were germinated on the surface of water droplets or on water agar, and the nuclei stained with HCl-Giemsa or the DNA-specific fluorochrome 4,6-diamidino-2-phenylindole. Mitosis was distinguished from meiosis by inferences from nuclear behavior (e.g., production of 4 small nuclei indicated meiosis.) Teliospore germination and associated nuclear behavior of most of the microcyclic rusts was found to represent notable variations from that usually accepted as typical. Atelocauda koae teliospores produce a long basidium with branches consisting of germ tubes from modified, nondehiscent, vesicle-like basidiospores. The diploid nucleus divides mitotically to produce 2-3 (4-5) daughter nuclei, each of which is capable of meiosis. Endoraecium acaciae and E. hawaiiensis are endocyclic and produce no basidiospores. Uromyces alyxiae teliospores produce a single basidiospore containing all of the meiotic nuclei. Teliospores of Puccinia rutainsulara produce a basidium with a single, terminal basidiospore. The diploid nucleus divides mitotically in the basidium to produce 2-3 (4) daughter nuclei, the distal-most usually migrating into the developing basidiospore and undergoing meiosis, resulting in a tetranucleate basidiospore. Other diploid nuclei in the basidium remain apparently functionless. Teliospores of P. rugispora produce an unusual basidium consisting of two globular, vesicle-like cells. Karyogamy occurs in maturing teliospores, indicating a sexual cycle, and one or two tetranuc1eate basidiospores are produced. However, interpretation of nuclear behavior relative to the position of meiosis requires further investigation.

FULL TEXT
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HOSTS
No host information available for this publication.


PATHOGENS
Rust fungi

RELEVANT TO BIOCONTROL
No.

KEY WORDS
Rust fungi.

IMAGES
04_010 -- Atelocauda koae 04_010 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_014 -- Atelocauda koae 04_014 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_018 -- Atelocauda koae 04_018 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_027 -- Atelocauda koae 04_027 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_028 -- Atelocauda koae 04_028 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_029 -- Atelocauda koae 04_029 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_031 -- Atelocauda koae 04_031 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_032 -- Atelocauda koae 04_032 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_033 -- Atelocauda koae 04_033 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_035 -- Atelocauda koae 04_035 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_037 -- Atelocauda koae 04_037 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_039 -- Atelocauda koae 04_039 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_040 -- Atelocauda koae 04_040 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_041 -- Atelocauda koae 04_041 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_044 -- Atelocauda koae 04_044 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_045 -- Atelocauda koae 04_045 - Atelocauda koae
PATHOGEN: Aspergillus melleus
04_048 -- Puccinia rugispora 04_048 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
04_053 -- Puccinia rugispora 04_053 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
04_054 -- Puccinia rugispora 04_054 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
04_055 -- Puccinia rugispora 04_055 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
04_058 -- Puccinia rugispora 04_058 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
04_059 -- Puccinia rugispora 04_059 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
04_062 -- Puccinia rugispora tetranucleate basidiospores 04_062 - Puccinia rugispora tetranucleate basidiospores
PATHOGEN: Aspergillus melleus
04_063 -- Puccinia rugispora 04_063 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
04_066 -- Puccinia rugispora tetranucleate basidiospores 04_066 - Puccinia rugispora tetranucleate basidiospores
PATHOGEN: Aspergillus melleus
04_069 -- Puccinia rugispora 04_069 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
04_070 -- Puccinia rugispora tetranucleate basidiospores 04_070 - Puccinia rugispora tetranucleate basidiospores
PATHOGEN: Aspergillus melleus
04_071 -- Puccinia rugispora tetranucleate basidiospores 04_071 - Puccinia rugispora tetranucleate basidiospores
PATHOGEN: Aspergillus melleus
04_072 -- Puccinia rugispora 04_072 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
04_073 -- Puccinia rugispora 04_073 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
04_074 -- Puccinia rugispora 04_074 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
04_075 -- Puccinia rugispora tetranucleate basidiospores 04_075 - Puccinia rugispora tetranucleate basidiospores
PATHOGEN: Aspergillus melleus
04_076 -- Puccinia rugispora 04_076 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
04_077 -- Puccinia rugispora 04_077 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
05_005 -- Puccinia rugispora tetranucleate basidiospore attached to sterigmata 05_005 - Puccinia rugispora tetranucleate basidiospore attached to sterigmata
PATHOGEN: Aspergillus melleus
05_042 -- Puccinia rugispora 05_042 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
05_043 -- Puccinia rugispora 05_043 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
05_044 -- Puccinia rugispora 05_044 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
05_045 -- Puccinia rugispora 05_045 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
05_046 -- Puccinia rugispora 05_046 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
05_047 -- Puccinia rugispora 05_047 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
05_048 -- Puccinia rugispora 05_048 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
05_049 -- Puccinia rugispora 05_049 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
05_050 -- Puccinia rugispora 05_050 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
05_051 -- Puccinia rugispora 05_051 - Puccinia rugispora
PATHOGEN: Aspergillus melleus
06_038 -- Uromyces alyxiae (maile rust) 06_038 - Uromyces alyxiae (maile rust)
PATHOGEN: Aspergillus melleus
06_039 -- Uromyces alyxiae (maile rust) 06_039 - Uromyces alyxiae (maile rust)
PATHOGEN: Aspergillus melleus
06_040 -- Uromyces alyxiae (maile rust) 06_040 - Uromyces alyxiae (maile rust)
PATHOGEN: Aspergillus melleus
06_041 -- Puccinia rutainsulara 06_041 - Puccinia rutainsulara
PATHOGEN: Aspergillus melleus
06_042 -- Puccinia rutainsulara 06_042 - Puccinia rutainsulara
PATHOGEN: Aspergillus melleus
06_043 -- Puccinia rutainsulara 06_043 - Puccinia rutainsulara
PATHOGEN: Aspergillus melleus
06_044 -- Puccinia rutainsulara 06_044 - Puccinia rutainsulara
PATHOGEN: Aspergillus melleus
06_045 -- Puccinia rutainsulara 06_045 - Puccinia rutainsulara
PATHOGEN: Aspergillus melleus
08_020 -- Puccinia vitata 08_020 - Puccinia vitata
PATHOGEN: Aspergillus melleus
08_021 -- Puccinia vitata 08_021 - Puccinia vitata
PATHOGEN: Aspergillus melleus
08_022 -- Puccinia vitata 08_022 - Puccinia vitata
PATHOGEN: Aspergillus melleus
08_023 -- Puccinia vitata 08_023 - Puccinia vitata
PATHOGEN: Aspergillus melleus
08_040 -- Uromyces alyxiae 08_040 - Uromyces alyxiae
PATHOGEN: Aspergillus melleus
08_041 -- Uromyces alyxiae 08_041 - Uromyces alyxiae
PATHOGEN: Aspergillus melleus
08_043 -- Uromyces alyxiae 08_043 - Uromyces alyxiae
PATHOGEN: Aspergillus melleus
10_006 -- Puccinia vitata III 10_006 - Puccinia vitata III
PATHOGEN: Aspergillus melleus
10_015 -- Puccinia vitata III 10_015 - Puccinia vitata III
PATHOGEN: Aspergillus melleus
10_019 -- Puccinia vitata III 10_019 - Puccinia vitata III
PATHOGEN: Aspergillus melleus
11_038 -- Puccinia rutainsulara 11_038 - Puccinia rutainsulara
PATHOGEN: Aspergillus melleus
11_039 -- Puccinia rutainsulara 11_039 - Puccinia rutainsulara
PATHOGEN: Aspergillus melleus
11_040 -- Puccinia rutainsulara 11_040 - Puccinia rutainsulara
PATHOGEN: Aspergillus melleus
11_041 -- Puccinia rutainsulara 11_041 - Puccinia rutainsulara
PATHOGEN: Aspergillus melleus
11_046 -- Puccinia rutainsulara 11_046 - Puccinia rutainsulara
PATHOGEN: Aspergillus melleus
11_047 -- Puccinia rutainsulara 11_047 - Puccinia rutainsulara
PATHOGEN: Aspergillus melleus

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Comments? Questions? e-mail webmaster@hear.org.  This template was created on 02 June 2004 by Starr, and was last updated on 10 August 2005 by PT.