INVESTIGADORES
LENCINAS Maria Vanessa
artículos
Título:
Above- and below-ground nutrient tissue concentration and leaf pigment changes in Nothofagus pumilio seedlings grown under light and soil moisture gradients
Autor/es:
SOLER ESTEBAN, R; MART├ŹNEZ PASTUR, G; LENCINAS, MV; MORETTO, A; PERI, P
Revista:
JOURNAL OF PLANT NUTRITION
Editorial:
TAYLOR & FRANCIS INC
Referencias:
Lugar: Philadelphia; Año: 2011 vol. 34 p. 2222 - 2222
ISSN:
0190-4167
Resumen:
To understand the ecophysiology of natural regeneration above- and below-ground nutrient tissue concentration and leaf pigment changes in N. pumilio seedlings grown in three light intensities (4%, 26% and 64% of natural irradiance) and two soil moisture levels (40-60% and 80-100% soil capacity) under greenhouse controlled conditions were evaluated. Carbon (C), nutrient tissue (N, P, Mg, K and Ca) and pigment (chlorophylls and carotenoids) were measured on seedlings. C, N, Mg, K and Ca increased in low light intensity and soil moisture treatments, while P decreased. Nutrients were higher in above- than in below-ground biomass. Chlorophylls were lower in high light treatments, while carotenoids increased their content. All pigments were greater in low soil moisture treatments. These changes are closely related to their photosynthetic plasticity and biomass compartmentalization. Plants growing in high light were more efficient than those growing in shaded environments to to produce the same amount of plant biomass.