ISSN:
1432-2048
Keywords:
Arabidopsis
;
Gravitropism
;
phyB-1
;
Phytochrome
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Hypocotyls of dark-grown seedlings of Ara bidosis thaliana exhibit a strong negative gravitropism, which is reduced by red and also by long-wavelength, far-red light treatments. Light treatments using phytochrome A (phyA)- and phytochrome B (phyB)-deficient mutants showed that this response is controlled by phyB in a red/far-red reversible way, and by phyA in a non-reversible, very-low-fluence response. Crosses of the previously analyzed phyB-1 allele (in the ecotype Landsberg erecta background) to the ecotype Nossen wild-type (WT) background resulted in a WT-like negative gravitropism in darkness, indicating that the previously described gravitropic randomization observed with phyB-1 in the dark is likely due to a second mutation independent of that in the PHYB gene.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00195180
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