Aspects of the genetic and botanical status of neotropical Azolla species

Variation among neotropical and other species of the aquatic fern Azolla Lam. was examined using molecular and physiological parameters. The three neotropical species of Section Azolla, A. caroliniana Willd., A. mexicana Presl, and A. microphylla Kaulf., were very similar in their DNA fingerprints f...

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Published inThe New phytologist Vol. 119; no. 4; pp. 561 - 566
Main Authors Zimmerman, W.J, Watanabe, I, Ventura, T, Payawal, P, Lumpkin, T.A
Format Journal Article
LanguageEnglish
Published Oxford, UK Cambridge University Press 01.12.1991
Blackwell Publishing Ltd
Blackwell
Subjects
Alleles
Azolla
Azolla caroliniana
Azolla mexicana
Azolla microphylla
Biological and medical sciences
Biological taxonomies
Breeding
Bryophyta
DNA
DNA probes
ecotypes
Freshwater
Fundamental and applied biological sciences. Psychology
Genetic hybridization
genetic polymorphism
genetic techniques and protocols
geographical distribution
germplasm
hybrid
Hybridity
hybrids
Monoclonal antibodies
phosphorus‐deficiency
Plant cytology, morphology, systematics, chorology and evolution
Plants
polymorphisms
Pteridophyta
Species
taxonomy
Taxonomy
DNA
Deficiency
Fingerprint method
Phosphorus
Hybridization
Pteridophyta
Filicineae
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Summary:Variation among neotropical and other species of the aquatic fern Azolla Lam. was examined using molecular and physiological parameters. The three neotropical species of Section Azolla, A. caroliniana Willd., A. mexicana Presl, and A. microphylla Kaulf., were very similar in their DNA fingerprints from hybridizations to heterologous and random homologous gene probes. These Azolla were also not separable by their symptomatic responses to phosphorus deficiency, although subgroups were observed that correlated to the + / - responses of cyanobionts to the monoclonal antibody McAb-C16. The strong affinity among these taxa was also demonstrated in breeding trials between A. mexicana-caroliniana and A. microphylla which yielded the first fertile Azolla hybrids, unlike previous Section Azolla crosses between A. filiculoides and A. mexicana or A. microphylla. Cumulative evidence indicates a need to reclassify Azolla of the New World.
Bibliography:Current address: Department of Agricultural Chemistry, Mie University, Tsu‐shi. Mie‐ken, 514 Japan.
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ISSN:0028-646X
1469-8137
DOI:10.1111/j.1469-8137.1991.tb01048.x