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Comparative Study of Leaf Morphology in Aster hispidus Thunb. var. leptocladus (Makino) Okuyama (Asteraceae)

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DOI: 10.4236/ajps.2012.31011    3,800 Downloads   7,599 Views   Citations

ABSTRACT

The comparative morphology and anatomy of leaves in the serpentine endemic Aster hispidus Thunb. var. leptocladus (Makino) Okuyama and its close relative A. hispidus var. hispidus were examined. Our morphological analysis revealed that the leaves of A. hispidus var. leptocladus were significantly smaller and narrower than those of A. hispidus var. hispidus. In particular, our anatomical analysis indicated that a decreased cell number of the horizontal axis of a leaf was involved in A. hispidus var. leptocladus. This was the same process as the changing pattern of the leaves of rheophytic species, and so, similar morphological leaf modifications occurred under different selection pressures of the serpentine soil and flooding frequency of river-stream.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

H. Hayakawa,  . Tunala, Y. Minamiya, K. Ito, S. Gale, J. Yokoyama, R. Arakawa and T. Fukuda, "Comparative Study of Leaf Morphology in Aster hispidus Thunb. var. leptocladus (Makino) Okuyama (Asteraceae)," American Journal of Plant Sciences, Vol. 3 No. 1, 2012, pp. 110-113. doi: 10.4236/ajps.2012.31011.

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