Abstract
In the present study, the petiole anatomy of 39 species from tribes Cichorieae (18), Cardueae (10), Anthemideae (5), Inuleae (4), Gymnarrheneae (1), Astereae (1), and Gnaphalieae (1) was investigated to determine their taxonomic significance. Leica Light Microscope (Model 1000) embedded with the Infinity 1–5 C-MEL (Canada) digital camera was used to take the photomicrographs. Results revealed intra and interspecific variation. Among the examined traits, the significant systematic qualitative characteristics are petiole outline, arrangement and number of vascular bundles, shape and number of layers of different cells, and air spaces. The delimitation of taxa up to species level is carried via taxonomic key based on these qualitative traits. The quantitative data of length and width of the petiole, epidermal cells, chlorenchyma cells, parenchyma cells, vascular bundles, xylem vessels, and phloem cells, were statistically analyzed, collected into a matrix, and examined their significance in the species separation. Variations were observed in the petiole and vascular bundle size on the multivariate ordination of principal components. The highest positive correlation (0.87 – 0.98) is found in xylem vessels length and width with phloem cells length and width. The least positive correlation (0.07) was between vascular bundle length with xylem vessels and phloem cells. The two-way dendrogram on neighbor-joining clustering in multivariate analysis summarized that the selected quantitative traits are significant in distinguishing the examined species. Conclusively petiole anatomical traits are significant diagnostic tools that assist the separation of Asteraceous taxa.
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Abbreviations
- NARC:
-
National Agricultural Research Centre
- ISL:
-
Islamabad
- QAU:
-
Quaid e Azam University
- DPX:
-
Dibutylphthalate Polystyrene Xylene
- UPGMA:
-
Un-weighted Pair Group Clustering Method
- PCA:
-
Principal Component Analysis
- SEM:
-
Scanning Electron Microscopy
- PCs:
-
Principal Components
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This work is from the PhD work of the first author and the authors are the thankful to Department of Plant Sciences for providing facilities for this research.
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BS and MA Conceptualized study. BS, SWG, MM, MZ and WN data collection. BS, SWG, SS, writing the original draft. MA and MZ review and editing. MA Supervised the study.
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Sadia, B., Ahmad, M., Zafar, M. et al. Taxonomic implications of petiole microanatomical traits among Asteraceae tribes from arid–semiarid regions of Baluchistan, Pakistan. Genet Resour Crop Evol (2024). https://doi.org/10.1007/s10722-024-01984-7
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DOI: https://doi.org/10.1007/s10722-024-01984-7