Abstract
The UV/VIS spectral characteristics of the standardized extracts of the leaves of 22 Solanum species of the Leptostemonum clade were investigated in the presence of shift reagents with the aid of multivariate analysis, to obtain data in support of the interspecific and subsectional delimitation proposed for Solanum sect. Erythrotrichum. Of these species, 20 belong to the section Erythrotrichum, S. paniculatum is assigned to the section Torva, and S. robustum is not attributed to a defined section. The results indicated characteristic λ(max) (absorbance maxima) for each species as well as the presence of phenolic compounds like flavonoids such as 5-hydroxy flavonols. Hierarchical cluster analysis (HCA) of the data obtained by UV/VIS analysis of the extracts or the extracts with the added shift reagents AlCl₃ and HCl showed a cophenetic correlation coefficient above 0.92 and the classification of the data into three groups. The principal-component analysis (PCA) revealed that the first three principal components accounted for over 98% of the total variance and showed results similar to those obtained by HCA. The present results supported the current proposal for interspecific delimitation of the studied species and partially supported the division of the section into two subsections. The UV/VIS spectral characteristics along with multivariate analysis appear to be a useful approach for distinguishing among species of the genus Solanum.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Each Solanum species showed characteristic UV/VIS absorbance maxima, consistent with flavonoids such as 5-hydroxy flavonols.
- Outcome
- characteristic λ(max) (absorbance maxima) for each speciese1
SolanumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaves of 22 Solanum species of the Leptostemonum clade were investigated”
e1“The results indicated characteristic λ(max) (absorbance maxima) for each species as well as the presence of phenolic compounds like flavonoids such as 5-hydroxy flavonols”
Claim · model-written summary
Hierarchical cluster analysis of UV/VIS data gave a cophenetic correlation coefficient above 0.92 and three groups.
Verbatim
e2“showed a cophenetic correlation coefficient above 0.92 and the classification of the data into three groups”
Claim · model-written summary
The first three principal components explained over 98% of the total variance of the UV/VIS data.
Verbatim
e3“The principal-component analysis (PCA) revealed that the first three principal components accounted for over 98% of the total variance”
Claim · model-written summary
Principal component analysis gave results similar to those from hierarchical cluster analysis.
Verbatim
e4“showed results similar to those obtained by HCA”
Claim · model-written summary
The UV/VIS results supported the current proposal for interspecific delimitation of Solanum species.
- Outcome
- current proposal for interspecific delimitatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaves of 22 Solanum species of the Leptostemonum clade were investigated”
e5“The present results supported the current proposal for interspecific delimitation of the studied species”
Claim · model-written summary
The UV/VIS results only partly supported dividing the section into two subsections.
- Outcome
- division of the section into two subsectionse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaves of 22 Solanum species of the Leptostemonum clade were investigated”
e6“partially supported the division of the section into two subsections”
Claim · model-written summary
UV/VIS spectra with multivariate analysis appear useful for distinguishing Solanum species.
- Outcome
- distinguishing among speciese7
Not reportedComparator
Verbatim
e7“The UV/VIS spectral characteristics along with multivariate analysis appear to be a useful approach for distinguishing among species of the genus Solanum”