TY - JOUR
T1 - La frecuencia estomática e intercambio de gases difieren en dos especies de blechnum (pteridophyta, blechnaceae) con distinto rango ecológico
AU - Atala, Cristian
AU - Saldaña, Alfredo
AU - Navarrete, Eduardo
N1 - Publisher Copyright:
© 2012, Universidad de Concepcion. All rights reserved.
PY - 2012
Y1 - 2012
N2 - In Chilean temperate forest, the fern Blechnum chilense has a wide ecological breath, but occur mainly in full sun habitats, while Blechnum mochaenum is restricted only to shady sites. We evaluated if the species with different ecological breath behave similarly in their anatomical and physiological traits. Maximal photosynthetic rate (Amax), Stomatal conductance (gs), evapotranspiration (E), and SLA (specific leaf area) were measured in situ in 20 individuals of each fern species. Additionally, we estimated the stomatal density (SD), stomatal index (SI), and stomatal size in leaves of each sampled individual. B. mochaenum, the shade-tolerant species, had lower SD, SI, A, and E, and higher stomatal size and SLA than B. chilense. Higher stomatal frequency could result in greater gas exchange in open sites for B. chilense. The leaf physiology of these fern species seems to depend partially on their stomatal traits.
AB - In Chilean temperate forest, the fern Blechnum chilense has a wide ecological breath, but occur mainly in full sun habitats, while Blechnum mochaenum is restricted only to shady sites. We evaluated if the species with different ecological breath behave similarly in their anatomical and physiological traits. Maximal photosynthetic rate (Amax), Stomatal conductance (gs), evapotranspiration (E), and SLA (specific leaf area) were measured in situ in 20 individuals of each fern species. Additionally, we estimated the stomatal density (SD), stomatal index (SI), and stomatal size in leaves of each sampled individual. B. mochaenum, the shade-tolerant species, had lower SD, SI, A, and E, and higher stomatal size and SLA than B. chilense. Higher stomatal frequency could result in greater gas exchange in open sites for B. chilense. The leaf physiology of these fern species seems to depend partially on their stomatal traits.
KW - Blechnum
KW - Evergreen temperate forest
KW - Gas exchange
KW - Stomatal density
KW - Stomatal index
KW - Stomatal size
UR - http://www.scopus.com/inward/record.url?scp=84973466849&partnerID=8YFLogxK
U2 - 10.4067/S0717-66432012000100016
DO - 10.4067/S0717-66432012000100016
M3 - Article
AN - SCOPUS:84973466849
VL - 69
SP - 161
EP - 166
JO - Gayana - Botanica
JF - Gayana - Botanica
SN - 0016-5301
IS - 1
ER -