Impact of mycorrhizae and irrigation in the survival of seedlings of Pinus radiata D. Don subject to drought

Authors

  • CRISTIAN ATALA Laboratorio de Anatomía y Ecología Funcional de Plantas. Departamento de Ciencias y Tecnología Vegetal. Universidad de Concepción, Campus Los Ángeles, Juan Antonio Coloma 0201, Los Ángeles, Chile.
  • EDGARDO MUÑOZ-CAPPONI Laboratorio de Anatomía y Ecología Funcional de Plantas. Departamento de Ciencias y Tecnología Vegetal. Universidad de Concepción, Campus Los Ángeles, Juan Antonio Coloma 0201, Los Ángeles, Chile.
  • GUILLERMO PEREIRA Laboratorio de Biotecnología de Hongos. Departamento de Ciencias y Tecnología Vegetal. Universidad de Concepción, Campus Los Ángeles, Juan Antonio Coloma 0201, Los Ángeles, Chile.
  • EDUARDO NAVARRETE GESE. Departamento de Ciencias y Tecnología Vegetal. Universidad de Concepción, Campus Los Ángeles, Juan Antonio Coloma 0201, Los Ángeles, Chile.
  • RÓMULO OSES Instituto de Investigaciones Agropecuarias (INIA), Centro Regional Intihuasi, La Serena, Chile.
  • MARCO MOLINA-MONTENEGRO Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile.

Keywords:

Pinus radiata, Rhizopogon luteolus, climate change, ectomycorrhizae, drought tolerance

Abstract

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.

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Published

2012-12-05

How to Cite

ATALA, C., MUÑOZ-CAPPONI, . E. ., PEREIRA, G. ., NAVARRETE, E. ., OSES, R., & MOLINA-MONTENEGRO, . M. . (2012). Impact of mycorrhizae and irrigation in the survival of seedlings of Pinus radiata D. Don subject to drought. Gayana Botánica, 69(2), 296-304. Retrieved from https://revistas.udec.cl/index.php/gayana_botanica/article/view/4091

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