Effects of salt stress on the leaf shape and scaling of pyrus betulifolia bunge

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dc.contributor.authorYu, Xiaojingen_ZA
dc.contributor.authorShi, Peijianen_ZA
dc.contributor.authorHui, Cangen_ZA
dc.contributor.authorMiao, Lifeien_ZA
dc.contributor.authorLiu, Changlaien_ZA
dc.contributor.authorZhang, Qiuyueen_ZA
dc.contributor.authorFeng, Chaonianen_ZA
dc.date.accessioned2021-01-29T08:02:51Z
dc.date.available2021-01-29T08:02:51Z
dc.date.issued2019
dc.descriptionCITATION: Yu, X., et al. 2019. Effects of salt stress on the leaf shape and scaling of pyrus betulifolia bunge. Symmetry, 11(8):991, doi:10.3390/sym11080991.
dc.descriptionThe original publication is available at https://www.mdpi.com
dc.description.abstractLeaf shape can reflect the survival and development of plants in different environments. In particular, leaf area, showing a scaling relationship with other leaf-shape indices, has been used to evaluate the extent of salt stress on plants. Based on the scaling relationships between leaf area and other leaf-shape indices in experiments at different levels of salt stress, we could examine which leaf-shape indices are also related to salt stress. In the present study, we explored the effects of different salt concentration treatments on leaf dry mass per unit area (LMA), the quotient of leaf perimeter and leaf area (QPA), the quotient of leaf width and length (QWL), the areal quotient (AQ) of left and right sides of a leaf and the standardized index (SI) for bilateral symmetry. We treated Pyrus betulifolia Bunge under NaCl salt solution of 2‰, 4‰ and 6‰, respectively, with fresh water with no salt as the control. The reduced major axis (RMA) was used to fit a linear relationship of the log-transformed data between any leaf trait measures and leaf area. We found that leaf fresh weight and dry weight decrease with salt concentration increasing, whereas the exponents of leaf dry weight versus leaf area exhibit an increasing trend, which implies that the leaves expanding in higher salt environments are prone to have a higher cost of dry mass investment to increase per unit leaf area than those in lower salt environments. Salt concentration has a significant influence on leaf shape especially QWL, and QWL under 6‰ concentration treatment is significantly greater than the other treatments. However, there is no a single increasing or decreasing trend for the extent of leaf bilateral symmetry with salt concentration increasing. In addition, we found that the scaling exponents of QPA versus leaf area for four treatments have no significant difference. It indicates that the scaling relationship of leaf perimeter versus leaf area did not change with salt concentration increasing. The present study suggests that salt stress can change leaf functional traits especially the scaling relationship of leaf dry weight versus leaf area and QWL, however, it does not significantly affect the scaling relationships between leaf morphological measures (including QPA and the extent of leaf bilateral symmetry) and leaf area.en_ZA
dc.description.urihttps://www.mdpi.com/2073-8994/11/8/991
dc.description.versionPublisher's version
dc.format.extent15 pages
dc.identifier.citationYu, X., et al. 2019. Effects of salt stress on the leaf shape and scaling of pyrus betulifolia bunge. Symmetry, 11(8):991, doi:10.3390/sym11080991
dc.identifier.issn2073-8994 (online)
dc.identifier.otherdoi:10.3390/sym11080991
dc.identifier.urihttp://hdl.handle.net/10019.1/109041
dc.language.isoen_ZAen_ZA
dc.publisherMDPI
dc.rights.holderAuthors retain copyright
dc.subjectLeaf bilateral symmetryen_ZA
dc.subjectPears -- Effect of salt onen_ZA
dc.subjectLeaves -- Growth -- Mathematical modelsen_ZA
dc.subjectAllometryen_ZA
dc.titleEffects of salt stress on the leaf shape and scaling of pyrus betulifolia bungeen_ZA
dc.typeArticleen_ZA
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