NDLI: Molecular characterization of four β-tubulin genes from dinitroaniline susceptible and resistant biotypes of Eleusine indica

Content Provider	Springer Nature Link
Author	Yamamoto, Etsuo Baird, W. Vance
Copyright Year	1999
Abstract	Dinitroaniline herbicides are antimicrotubule drugs that bind to tubulins and inhibit polymerization. As a result of repeated application of dinitroaniline herbicides, resistant biotypes of goosegrass (Eleusine indica) developed in previously susceptible wild-type populations. We have previously reported that α-tubulin missense mutations correlate with dinitroaniline response phenotypes (Drp) (Plant Cell 10: 297–308, 1998). In order to ascertain associations of other tubulins with dinitroaniline resistance, four β-tubulin cDNA classes (designated TUB1, TUB2, TUB3, and TUB4) were isolated from dinitroaniline-susceptible and -resistant biotypes. Sequence analysis of the four β-tubulin cDNA classes identified no missense mutations. Identified nucleotide substitutions did not result in amino acid replacements. These results suggest that the molecular basis of dinitroaniline resistance in goosegrass differs from those of colchicine/dinitroaniline cross-resistant Chlamydomonas reinhardtii and benzimidazole-resistant fungi and yeast. Expression of the four β-tubulins was highest in inflorescences. This is in contrast to α-tubulin TUA1 that is expressed predominantly in roots. Collectively, these results imply that β-tubulin genes are not associated with dinitroaniline resistance in goosegrass. Phylogenetic analysis of the four β-tubulins, together with three α-tubulins, suggests that the resistant biotype developed independently in multiple locations rather than spreading from one location.
Starting Page	45
Ending Page	61
Page Count	17
File Format	PDF
ISSN	01674412
Journal	Plant Molecular Biology
Volume Number	39
Issue Number	1
e-ISSN	15735028
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1999-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biochemistry Plant Sciences Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Medicine Agronomy and Crop Science

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