AI Article Synopsis
- Hibiscus syriacus L. is a hardy deciduous shrub that has complex genetic backgrounds and varying ploidy levels, with polyploid breeding being key for developing new cultivars.
- This study investigated the effects of triploid, tetraploid, and hexaploid levels on traits like leaf size, stomatal characteristics, and anatomy, finding that higher ploidy resulted in smaller leaves but larger stomatal features and thicker leaf tissues.
- The research emphasizes the importance of stomatal morphology as a tool for assessing ploidy levels and suggests that the findings can guide future breeding strategies to enhance stress resistance and ornamental qualities in Hibiscus cultivars.
Article Abstract
Background: Hibiscus syriacus L. is a deciduous shrub with a strong environmental resistance and wide application prospects. The genetic background and ploidy levels of Hibiscus cultivars are complex, and polyploid breeding has long been an important method for developing new Hibiscus cultivars. However, the relationship of ploidy levels with leaf morphology, stomatal characteristics, and leaf anatomy remains unclear.
Results: This study analyzed three ploidy levels (triploid, tetraploid, and hexaploid) of Hibiscus syriacus. Flow cytometry confirmed the ploidy levels, and morphological traits were evaluated. Leaf length, leaf width, and petiole length decreased with increasing ploidy. Stomatal length, stomatal width, guard cell length, and guard cell width increased and stomatal number and density decreased with increasing ploidy. The hexaploids exhibited the highest midrib diameter and palisade tissue thickness values. Correlation analyses revealed that stomatal morphology served as a reliable marker for determining ploidy levels.
Conclusion: This study highlights the impact of varying ploidy levels on the leaf and stomatal morphologies and leaf anatomy of Hibiscus syriacus. These findings can provide theoretical guidance for improving Hibiscus cultivars in terms of stress resistance, adaptability, and ornamental traits, and for developing new cultivars with enhanced characteristics. Future research should focus on utilizing these morphological markers to optimize breeding strategies for Hibiscus cultivars.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11603925 | PMC |
| http://dx.doi.org/10.1186/s12870-024-05778-y | DOI Listing |
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