Potential desiccation tolerant vascular plants from Southeastern Brazil

• Autorzy: Meirelles S. T. , De Mattos E.A. , Da Silva A.C.
• Języki publikacji: EN

Abstrakty

EN

A survey of the capacity to endure desiccation was obtained for several Brazilian rock outcrop plants. Seedlings, leaves and entire plants were subjected to dehydration. After dehydration, survival was observed as the ability to recover growth, chlorophyll content and/or by the absence of leakage of leaft contents. A total of 30 species growing in rock outcroppings in southeastern Brazil showed some ability to undergo extreme dehydration. The species belong to the cryptogams Polypodiaceae, Pteridaceae, Schizaeaceae and Selaginellaceae and to the angiosperms Cyperaceae, Poaceae and Velloziaceae. All cryptogams were homeochlorophyllous. Among the angiosperms Microchloa indica (Poaceae) was the only species with the capacity to retain chlorophyll content during dehydration. All species showed some evidence of desiccation tolerance similar to that previously reported for tolerant angiosperms in Africa. The data suggest that rock outcroppings from the southeastern and central regions of Brazil give support to typical vegetation in which a great number of species exhibit a desiccation-tolerant comportment.

Słowa kluczowe

EN

Brazil; rock outcropping; vascular plant; desiccation tolerance; water stress

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 1997
• Tom: 06
• Numer: 4
• Opis fizyczny: p.17-21,ref.

Twórcy

autor

Meirelles S. T.

• Universidade de Sao Paulo. C.P.11461. Rau do Matao, Travessa 14, Sao Paulo-SP, CEP 05422-970, Brazil

autor

De Mattos E.A.

autor

Da Silva A.C.