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Título: Photosynthesis and leaf nutrient content in Ochroma pyramidale (bombacaceae). Marenco, RA; Gonçalves, JF, Vieira, G.
Autor(es): Ricardo Antonio Marenco
Gil Vieira
José Francisco de Carvalho Gonçalves
Assunto: Photosynthesis
nutrient content
Ochroma pyramidale (bombacaceae)
ISSN: 0300-3604
Revista: Photosynthetica
Volume: 39
Resumo: In Ochroma pyramidale (Cav. ex Lam.) Urb., photon-saturated photosynthetic capacity (P-Nmax) was 13 mumol(CO2) m(-2)s(-1). Average stomatal conductance (g(s)) and water-use efficiency (WUE) were greater at high irradiance, about 260 mmol(H2O) m(-2) s(-1) and 2.15 g(C) kg(-1)(H2O), respectively. In the dark, g(s) values were about 30 % of maximum g(s). Leaf nutrient contents on a leaf area basis were 13 1, 15, 36, 21, and 12 mmol m(-2) for N, P, K, Ca, and Mg, respectively. Ochroma also accumulated a greater amount of soluble saccharides than starch, 128 versus 90 g kg(-1)(DM). The availability of N and Mg, but not P, Ca, or K, may limit photosynthetic rates of Ochroma in this site.
ISSN: 0300-3604
Aparece nas coleções:Coordenação de Dinâmica Ambiental (CDAM)

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