Results 201 to 210 of about 22,407 (233)
Nature, 1950 IN 1948, Prof. G. Haggqvist1 reported the production of tetraploid frogs (Rana temporaria) by colchicine treatment at fertilization, all previous workers having been unsuccessful. Chromosome counts were not made. Instead, tetraploidy was inferred from the relatively greater volume of epidermal nuclei of some treated animals as compared with controls ...
M. Fischberg, R. A. Beatty
openaire +2 more sources
Nature, 1948 IN the course of experiments on the bactericidal action of X-rays on the R and S phases of Escherichia coli, it was found that the survival-rate in three stocks (76, 111, Ida), irradiated twenty-four hours after seeding, was different1; one of them (stock Ida) was more resistant to the radiation as compared with the other two stocks.
A. Buzzati-Traverso +2 more
openaire +2 more sources
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Trends in Ecology & Evolution, 1998
In his interesting commentary on transposable elements (TEs), gene silencing and macroevolution, John McDonald[1xMcDonald, J. Trends Ecol. Evol. 1998; 13: 94–95Abstract | Full Text PDF | PubMed | Scopus (52)See all References[1]omitted a major player that has acted in concert with TEs to drive vertebrate and plant evolution, namely, polyploidy.
A.J.M Matzke, M.A Matzke
openaire +3 more sources
In his interesting commentary on transposable elements (TEs), gene silencing and macroevolution, John McDonald[1xMcDonald, J. Trends Ecol. Evol. 1998; 13: 94–95Abstract | Full Text PDF | PubMed | Scopus (52)See all References[1]omitted a major player that has acted in concert with TEs to drive vertebrate and plant evolution, namely, polyploidy.
A.J.M Matzke, M.A Matzke
openaire +3 more sources
1980
Chromosome studies of pteridophytes had their major impetus in the work of Irene Manton (1) who was the first to show the far-reaching significance of Polyploidy in these plants. Her work was followed not only by numerous investigations by her own students at the University of Leeds but by researchers in many parts of the world, including especially ...
Warren H. Wagner, Florence S. Wagner
openaire +3 more sources
Chromosome studies of pteridophytes had their major impetus in the work of Irene Manton (1) who was the first to show the far-reaching significance of Polyploidy in these plants. Her work was followed not only by numerous investigations by her own students at the University of Leeds but by researchers in many parts of the world, including especially ...
Warren H. Wagner, Florence S. Wagner
openaire +3 more sources
Polyploidy and Gender Dimorphism
Science, 2001Miller and Venable ([1][1]) claimed that polyploidy is a “trigger of unrecognized importance” for the evolution of gender dimorphism, an idea originally proposed by Jennings ([2][2]) and Baker ([3][3]).
Aaron Liston, Johanne Brunet
openaire +3 more sources
Effects of polyploidy on photosynthesis [PDF]
Photosynthesis Research, 1993 In polyploid plants the photosynthetic rate per cell is correlated with the amount of DNA per cell. The photosynthetic rate per unit leaf area is the product of the rate per cell times the number of photosynthetic cells per unit area. Therefore, the photosynthetic rate per unit leaf area will increase if there is a less than proportional increase in ...
Donn A. Warner, Gerald E. Edwards
openaire +2 more sources
Polyploidy and Radiosensitivity
Nature, 1957Conger and Johnston1 have concluded, from studies of the effects of X-radiation in a flower bud of Tradescantia paludosa containing a mixed population of diploid and haploid microspores, that chromosomal radiosensitivity or sensitivity per unit length of chromosome is identical in haploid and diploid cells.
A. T. Natarajan +1 more
openaire +2 more sources
Nature, 1958
IN addition to the four strains of Saccharomyces cerevisiae and one strain of Saccharomyces delbrueckii that form asci with more than four spores per ascus1, I have found eight other strains of Saccharomyces cerevisiae that are able to form asci with five, six, seven, eight and nine smooth, round ascospores. One of these strains was obtained some years
openaire +3 more sources
IN addition to the four strains of Saccharomyces cerevisiae and one strain of Saccharomyces delbrueckii that form asci with more than four spores per ascus1, I have found eight other strains of Saccharomyces cerevisiae that are able to form asci with five, six, seven, eight and nine smooth, round ascospores. One of these strains was obtained some years
openaire +3 more sources
Polyploidy and Distribution [PDF]
, 1980 Since Polyploidy has been recognized as a widespread and common phenomenon among eukaryotes, particularly higher plants, biologists have been interested in possible causal connections between Polyploidy and distribution, and have tried to present relevant generalizations and “rules.” A quick historical survey of this topic takes us back to the first ...
openaire +2 more sources