Abstract
1. The pattern of differential chromosome segments produced as a result of cold treatment in a number of collections of Trillium grandiflorum (Michx.) Salisb. and T. erectum L. from various parts of the country has been determined. Root tips were used as a source of material, and the Feulgen technique, together with a squash method, was employed. All measurements were made upon metaphase chromosomes. 2. The pattern of such differential segments is not constant in T. grandiflorum (Michx.) Salisb. and T. erectum L. collected from widely separated areas. 3. Certain regions of differential reactivity appear to be constant as to position within a species; however, these segments are not constant as to length. 4. It is probable that T. erectum L. and T. grandiflorum (Michx.) Salisb. can be separated from each other on the basis of their patterns of differential segments. Fourteen differential segments were found to be constant as to position in T. erectum L., whereas eighteen such segments appear to be constant in T. grandiflorum (Michx.) Salisb. 5. Increase or decrease in total length of the diploid chromosome set as a result of cold treatment is not constant within a species. In some collections there appears to be an increase in total length; in others, a decrease.
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Claims 7
Claim · model-written summary
Differential segment patterns vary among distant collections of both Trillium species.
- Taxon
- T. grandiflorum (Michx.) Salisb. and T. erectum L.
Trillium erectum.png?width=60)
Trillium grandiflorume0 - Outcome
- pattern of such differential segmentse0
- Direction
- not constante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.png?width=500)
Verbatim
e0“The pattern of such differential segments is not constant in T. grandiflorum (Michx.) Salisb. and T. erectum L. collected from widely separated areas.”
Claim · model-written summary
Some differential regions have constant positions within a species.
TrilliumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Certain regions of differential reactivity appear to be constant as to position within a species; however, these segments are not constant as to length.”
t0“Trillium”
Claim · model-written summary
Differential segments vary in length within a species.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these segments are not constant as to length”
t0“Trillium”
Claim · model-written summary
Chromosome segment patterns probably distinguish the two Trillium species.
- Taxon
- T. erectum L. and T. grandiflorum (Michx.) Salisb.Trillium erectumTrillium grandiflorume0
- Outcome
- separated from each othere0
- Qualifier
- It is probablee0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is probable that T. erectum L. and T. grandiflorum (Michx.) Salisb. can be separated from each other on the basis of their patterns of differential segments.”
Claim · model-written summary
Fourteen segments had constant positions in T. erectum.
- Taxon
- T. erectum L.Trillium erectume0
- Outcome
- differential segmentse0
- Direction
- constant as to positione0
- Value
- Fourteen differential segmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fourteen differential segments were found to be constant as to position in T. erectum L.”
Claim · model-written summary
Eighteen segments appeared to have constant positions in T. grandiflorum.
- Taxon
- T. grandiflorum (Michx.) Salisb.Trillium grandiflorume0
- Outcome
- such segmentse0
- Direction
- constante0
- Value
- eighteen such segmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“eighteen such segments appear to be constant in T. grandiflorum (Michx.) Salisb.”
Claim · model-written summary
Cold treatment changes total diploid chromosome length inconsistently among collections.
- Treatment
- cold treatmente0
- Outcome
- total length of the diploid chromosome sete0
- Direction
- Increase or decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase or decrease in total length of the diploid chromosome set as a result of cold treatment is not constant within a species. In some collections there appears to be an increase in total length; in others, a decrease.”
t0“Trillium”