Abstract
From a restricted range in eastern Texas three chromosome numbers for Claytonia virginica L. are reported. Three individuals have been found with somatic numbers of 14, and one each with 15 and 28 chromosomes. No significant differences in gross morphology or pollen grain size were noted between these cytologically diverse individuals. The somatic chromosomes of five plants of the common Claytonia virginica L. (spring beauty) in eastern Texas have been examined. Flower buds were pre-treated for two and a half hours in PDB (para- dichlorobenzene), fixed in Carnoy's fluid (3 parts 95 per cent ethyl alcohol to 1 part glacial acetic acid), and squashed in 2 per cent acetic- orcein to obtain satisfactory mitotic plates. Localities and collectors of the plants are listed in Table 1 and are numbered from A to E. Three plants have somatic chromosome num- bers of 14, one individual has 15, and a third number of 28 is recorded for one plant (Figure 1). Note that the individual with 2n= 15 chromosomes was collected in the same population as one with 14 chromosomes. All individuals are indistinguishable by any gross morphological character. Pollen from each of the plants having different chromosome num- bers was stained in 1 per cent acetic-orcein and immediately measured across the widest diameter. Fifty pollen grains measured from each plant gave the following statistically summarized results: Plant A (2n= 14)---=63.6 (s= ?6.7, s-=f0.9) u, range 43.6 - 74.4 u; Plant D (2n=15)---=55.6 (s=_16.7, sx= 2.4) u, range 14.4-79.0 u; Plant E (2n = 28)--= 61.9 (s-= -8.6, si= 1.2) u, range 43.9- 79.9 u. From these data, no statistical difference can be noted in pollen size; in fact pollen from the plant with the highest chromosome number is smaller on the average than the plant with the smallest chromosome number. The aneuploid plant (2n= 15) has the smallest average pollen size due primarily to the micro-pollen occasionally measured in the random sample (as small as 14.4 u).
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Claims 10
Claim · model-written summary
Three individuals had 14 somatic chromosomes.
- Taxon
- Claytonia virginica L.
Claytonia virginicae0 - Outcome
- somatic numberse0
- Value
- 14e0
- Qualifier
- Three individualse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“three chromosome numbers for Claytonia virginica L. are reported. Three individuals have been found with somatic numbers of 14”
Claim · model-written summary
One individual had 15 somatic chromosomes.
- Taxon
- Claytonia virginica L.Claytonia virginicae0
- Outcome
- chromosomese1
- Value
- 15e1
- Qualifier
- one eache1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From a restricted range in eastern Texas three chromosome numbers for Claytonia virginica L. are reported.”
e1“one each with 15 and 28 chromosomes”
Claim · model-written summary
One individual had 28 somatic chromosomes.
- Taxon
- Claytonia virginica L.Claytonia virginicae0
- Outcome
- chromosomese1
- Value
- 28e1
- Qualifier
- one eache1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From a restricted range in eastern Texas three chromosome numbers for Claytonia virginica L. are reported.”
e1“one each with 15 and 28 chromosomes”
Claim · model-written summary
Individuals with different chromosome numbers showed no significant gross-morphology differences.
- Taxon
- Claytonia virginica L.Claytonia virginicae0
- Outcome
- gross morphologye1
- Direction
- No significant differencese1
- Comparator
- cytologically diverse individualse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From a restricted range in eastern Texas three chromosome numbers for Claytonia virginica L. are reported.”
e1“No significant differences in gross morphology or pollen grain size were noted between these cytologically diverse individuals”
Claim · model-written summary
Individuals with different chromosome numbers showed no significant pollen-size differences.
- Taxon
- Claytonia virginica L.Claytonia virginicae0
- Organ / stage
- pollen graine1
- Outcome
- pollen grain sizee1
- Direction
- No significant differencese1
- Qualifier
- cytologically diverse individualse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From a restricted range in eastern Texas three chromosome numbers for Claytonia virginica L. are reported.”
e1“No significant differences in gross morphology or pollen grain size were noted between these cytologically diverse individuals”
Claim · model-written summary
The 15-chromosome individual occurred in the same population as a 14-chromosome individual.
- Taxon
- Claytonia virginica L.Claytonia virginicae0
- Outcome
- same populatione1
- Value
- 2n= 15e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From a restricted range in eastern Texas three chromosome numbers for Claytonia virginica L. are reported.”
e1“individual with 2n= 15 chromosomes was collected in the same population as one with 14 chromosomes”
Claim · model-written summary
Mean pollen diameter was 63.6 u for Plant A with 14 chromosomes.
- Taxon
- Claytonia virginica L.Claytonia virginicae0
- Material
- Plant Ae1
- Outcome
- pollen grain sizee2
- Value
- 63.6e1
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From a restricted range in eastern Texas three chromosome numbers for Claytonia virginica L. are reported.”
e1“Plant A (2n= 14)---=63.6 (s= ?6.7, s-=f0.9) u”
e2“pollen grain size”
Claim · model-written summary
Mean pollen diameter was 55.6 u for Plant D with 15 chromosomes.
- Taxon
- Claytonia virginica L.Claytonia virginicae0
- Material
- Plant De1
- Outcome
- pollen grain sizee2
- Value
- 55.6e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From a restricted range in eastern Texas three chromosome numbers for Claytonia virginica L. are reported.”
e1“Plant D (2n=15)---=55.6 (s=_16.7, sx= 2.4) u”
e2“pollen grain size”
Claim · model-written summary
Mean pollen diameter was 61.9 u for Plant E with 28 chromosomes.
- Taxon
- Claytonia virginica L.Claytonia virginicae0
- Material
- Plant Ee1
- Outcome
- pollen grain sizee2
- Value
- 61.9e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From a restricted range in eastern Texas three chromosome numbers for Claytonia virginica L. are reported.”
e1“Plant E (2n = 28)--= 61.9 (s-= -8.6, si= 1.2) u”
e2“pollen grain size”
Claim · model-written summary
The aneuploid plant had the smallest average pollen size, associated with occasional micro-pollen.
- Taxon
- Claytonia virginica L.Claytonia virginicae0
- Organ / stage
- micro-pollene1
- Outcome
- average pollen sizee1
- Direction
- smalleste1
- Value
- 14.4 ue1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From a restricted range in eastern Texas three chromosome numbers for Claytonia virginica L. are reported.”
e1“The aneuploid plant (2n= 15) has the smallest average pollen size due primarily to the micro-pollen occasionally measured in the random sample (as small as 14.4 u)”