TY - JOUR
T1 - Impacto de la inoculación con micorrizas y el riego en la sobrevivencia de plántulas de pinus radiata D. Don sometidas a sequía
AU - Atala, Cristian
AU - Muñoz-Capponi, Edgardo
AU - Pereira, Guillermo
AU - Navarrete, Eduardo
AU - Oses, Rómulo
AU - Molina-Montenegro, Marco
N1 - Publisher Copyright:
© 2012, Universidad de Concepcion. All rights reserved.
PY - 2012
Y1 - 2012
N2 - In drought condition, plants increase survival chance by adjusting their functional traits and by biological associations. Mycorrhizae association and artificial watering have been shown to increase plant survival under drought, especially at early developmental stages when plants are more susceptible. In Chile, Pinus radiata is the most important forest species. It is grown mainly in Central Chile, where precipitations are predicted to drop in 40% and change in frequency in the future due to climate change. Rhizopogon luteolus is an ectomycorrhizae usually associated with Pinus species and has been found to increase drought tolerance. We addressed the effect of R. luteolus inoculation on survival and functional traits of P. radiata seedlings exposed to two watering treatments. These treatments simulated control (50 ml) and 40% reduced precipitations (20 ml). We also evaluated the combined effect of watering quantity (20 and 50 ml) and frequency (every 5, 10 and 30 days) on the same variables. R. luteolus inoculation increased seedling survival, but reduced plant size. Watering quantity affected plant survival only at intermediate watering frequencies, but not at the high and low frequencies. The lowest frequency, normal for the summer of Central Chile, resulted in ∼80% seedling mortality. Most of the functional traits measured were not affected neither by watering frequency nor quantity, but they were affected by mycorrhization. Mycorrhizae inoculation, together with some sort of artificial watering could be a possible strategy to cope with prolonged drought events.
AB - In drought condition, plants increase survival chance by adjusting their functional traits and by biological associations. Mycorrhizae association and artificial watering have been shown to increase plant survival under drought, especially at early developmental stages when plants are more susceptible. In Chile, Pinus radiata is the most important forest species. It is grown mainly in Central Chile, where precipitations are predicted to drop in 40% and change in frequency in the future due to climate change. Rhizopogon luteolus is an ectomycorrhizae usually associated with Pinus species and has been found to increase drought tolerance. We addressed the effect of R. luteolus inoculation on survival and functional traits of P. radiata seedlings exposed to two watering treatments. These treatments simulated control (50 ml) and 40% reduced precipitations (20 ml). We also evaluated the combined effect of watering quantity (20 and 50 ml) and frequency (every 5, 10 and 30 days) on the same variables. R. luteolus inoculation increased seedling survival, but reduced plant size. Watering quantity affected plant survival only at intermediate watering frequencies, but not at the high and low frequencies. The lowest frequency, normal for the summer of Central Chile, resulted in ∼80% seedling mortality. Most of the functional traits measured were not affected neither by watering frequency nor quantity, but they were affected by mycorrhization. Mycorrhizae inoculation, together with some sort of artificial watering could be a possible strategy to cope with prolonged drought events.
KW - Climate change
KW - Drought tolerance
KW - Ectomycorrhizae
KW - Pinus radiata
KW - Rhizopogon luteolus
UR - http://www.scopus.com/inward/record.url?scp=84973547842&partnerID=8YFLogxK
U2 - 10.4067/S0717-66432012000200009
DO - 10.4067/S0717-66432012000200009
M3 - Article
AN - SCOPUS:84973547842
VL - 69
SP - 296
EP - 304
JO - Gayana - Botanica
JF - Gayana - Botanica
SN - 0016-5301
IS - 2
ER -