info:eu-repo/semantics/article
Above- and below-ground nutrient tissue concentration and leaf pigment changes in patagonian woody seedlings grown under light and soil moisture gradients
Fecha
2011-11Registro en:
Soler Esteban, Rosina Matilde; Martínez Pastur, Guillermo José; Lencinas, María Vanessa; Moretto, Alicia Susana; Peri, Pablo Luis; Above- and below-ground nutrient tissue concentration and leaf pigment changes in patagonian woody seedlings grown under light and soil moisture gradients; Taylor & Francis; Journal of Plant Nutrition; 34; 14; 11-2011; 2222-2236
0190-4167
CONICET Digital
CONICET
Autor
Soler Esteban, Rosina Matilde
Martínez Pastur, Guillermo José
Lencinas, María Vanessa
Moretto, Alicia Susana
Peri, Pablo Luis
Resumen
To understand the ecophysiology of natural regeneration above- and below-ground nutrient tissue concentration and leaf pigment changes in Nothofagus pumilio (lenga) 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), nitrogen (N), phosphorus (P), magnesium (Mg), potassium (K), calcium (Ca) and pigment (chlorophylls and carotenoids) were measured on seedlings. Carbon, 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 to produce the same amount of plant biomass.