Photosynthetica 2017, 55(3):401-410 | DOI: 10.1007/s11099-016-0654-3

Leaf anatomy and photosynthetic efficiency of Acrostichum danaeifolium after UV radiation

A. M. Fonini1, J. B. Barufi1, É. C. Schmidt2, A. C. Rodrigues1, Á. M. Randi1,*
1 Department of Botany, Federal University of Santa Catarina, Campus Universitário Reitor João David Ferreira Lima, Trindade, Florianópolis, SC, Brazil
2 Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina 88049-900, Florianópolis, SC, Brazil

This paper reports effects of ultraviolet B (UVB) radiation on leaf anatomy and contents of chlorophyll and carotenoids, as well as photosynthetic parameters, in young sporophytes of Acrostichum danaeifolium Langsd. & Fisch. (Polypodiopsida, Pteridaceae) exposed to UV radiation treatments for 1 h daily for six weeks. The leaves showed large aerenchyma and present chloroplasts in both epidermises. After cultivation under PAR + UVA + UVB, leaves showed curling and malformed stomata on the abaxial face. After the UV treatment, chloroplasts in leaves were arranged against the inner wall of the epidermal cells. Transmission electron microscopy analysis showed some dilated thylakoids and plastoglobuli in chloroplasts and vesicles containing phenolic compounds in the cytoplasm. Differences were not observed between control and UV-treated plants in their contents of chlorophylls, carotenoids, and photosynthetic parameters. A. danaeifolium grown in sunny mangrove environment seems to have mechanisms preventing photosystem damage.

Additional key words: giant leather fern; mangrove; photoresponse; young sporophyte

Received: March 17, 2016; Accepted: July 15, 2016; Published: September 1, 2017  Show citation

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Fonini, A.M., Barufi, J.B., Schmidt, É.C., Rodrigues, A.C., & Randi, Á.M. (2017). Leaf anatomy and photosynthetic efficiency of Acrostichum danaeifolium after UV radiation. Photosynthetica55(3), 401-410. doi: 10.1007/s11099-016-0654-3
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