Differentiation among Chromosomes in Elodea

Santos, José K.

doi:10.1086/333135

Cited by 39 publications

(9 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interestingly, sex chromosomes in angiosperms were simultaneously discovered by four different groups using Elodea gigantea (Santos, 1923), hop ( Humulus lupulus ) (Winge, 1923), Silene latifolia (syn. Melandrium album ) (Blackburn, 1923;Winge, 1923), and Rumex acetosa (Kihara and Ono, 1923).…”

Section: Introductionmentioning

confidence: 99%

Sex chromosome-linked genes in plants

Matsunaga

2006

Genes Genet. Syst.

View full text Add to dashboard Cite

Recent studies of plant sex chromosome-linked genes have revealed many interesting characteristics, although there are limited reports about heteromorphic sex chromosomes in flowering plants. Sex chromosome-linked genes in angiosperms have been characterized mainly in the dioecious plant Silene latifolia . Although all such genes were isolated from transcripts of male flower buds of S. latifolia , most seem to be housekeeping genes except for the petal-and stamen-specific MADS box gene on the Y chromosome ( SlAP3Y ) and the male reproductive organspecific gene on the X chromosome ( MROS3X ). Recent evolutionary studies have revealed at least three evolutionary strata on the X chromosome that are related to stepwise loss of recombination between the sex chromosomes. Moreover, genetic maps showed conservation of gene organization on the X chromosome in the genus Silene and substantial pericentric inversion between the X and Y chromosomes of S. latifolia during evolution. A comparison between paralogs on the sex chromosomes revealed that introns of the Y-linked genes are longer than those of X-linked paralogs. Although analyses of sex chromosome-linked genes suggest that degeneration of the Y chromosome has occurred, the Y chromosome in flowering plants remains the largest in the male genome, unlike that of mammals. Accumulation of repetitive sequences and the entire chloroplast genome on the Y chromosome appear to have contributed to this large size. However, more detailed studies will be required to help explain the basis for the fact that heteromorphic sex chromosomes in angiosperms are large.

show abstract

Section: Introductionmentioning

confidence: 99%

Sex chromosome-linked genes in plants

Matsunaga

2006

Genes Genet. Syst.

View full text Add to dashboard Cite

show abstract

“…Pollen size dimorphism has been reported for dioecious species in other genera, the best-known example of which comes from work with Elodea by Santos (1923Santos ( , 1924. In the first of these papers, Santos (1923) concluded that no size dimorphism existed in E. gigantea.…”

Section: Early Studies Suggested That Y-bearing Pollen Grains Inmentioning

confidence: 99%

The relationship between pollen grain size and progeny gender in dioecious Silene latifolia (Caryophyllaceae)

Carroll

Mulcahy

1991

Sexual Plant Reprod

View full text Add to dashboard Cite

Experiments and observations conducted during the past 90 years have provided conflicting evidence concerning the existence of a size difference between pollen grains containing an X chromosome (female-determining) and those containing a Y chromosome (maledetermining) in dioecious Silene latifolia. Were such a size difference to exist, this might explain, at least in part, the observation that X-bearing pollen tubes reach the ovary more quickly, on average, than Y-bearing pollen tubes. We tested for such a size difference by separating pollen collected from single anthers into three size clasges: small, large, and random. Fruit set (number of pollinated flowers that set fruit) and seed set (number of seeds per capsule) did not differ for these three pollination treatments. Progeny sex ratios resulting from these three pollen size classes also did not differ significantly. Thus, pollen grain size is not affected by which of the two sex chromosomes is present. Our experiment is the first direct test of this relationship. Based on our results, size differences should not be invoked to explain competitive differences in male-and female-determining microgametophytes.

show abstract

“…Since the sex-chromosome was discovered in Rumex acetosa (Kihara and Ono, 1923a, b), Elodea canadensis (Santos, 1923), and Melandrium, (Blackburn, 1923, Winge, 1923) the investigations of sex-chromosomes in angiosperms have been carried on very actively, and the latest compilation by Sinoto (1929) shows that 51 species of higher dioecious plants contain so-called sex-chromosomes. Neverthe less as far as the origin of sex-chromosome, or the phylogeny of the dioecious plants are concerned, there exists scarcely any explanation.…”

Section: Introductionmentioning

confidence: 99%

On the Special Autosomes with Reference to the Sex-determination of <i>Rumex acetosa</i>, L.

Takenaka¹

1937

CYTOLOGIA

View full text Add to dashboard Cite

Differentiation among Chromosomes in Elodea

Cited by 39 publications

References 5 publications

Sex chromosome-linked genes in plants

Sex chromosome-linked genes in plants

The relationship between pollen grain size and progeny gender in dioecious Silene latifolia (Caryophyllaceae)

On the Special Autosomes with Reference to the Sex-determination of <i>Rumex acetosa</i>, L.

Contact Info

Product

Resources

About