Provenance causes variation on early growth and survival and sun protection on physiological responses of the vulnerable Nothofagus glauca (Phil.) Krasser in a common garden in Central Chile
Quiroz, Iván A.
Espinoza, Sergio E.
Yañez, Marco A.
Magni Díaz, Carlos Renato
Martínez, Eduardo E.
Gutiérrez, Braulio T.
Faúndez, Angela F.
Vaswani Miranda, Suraj Antonio
Cita de ítem
Environmental and Sustainability Indicators 15 (2022) 100192
We assessed outplanting performance of N. glauca in two trials. In Trial 1, provenances from Pre- Andean
(Linares, Longaví) and Coastal (Curanipe, Empedrado) origins were planted in a common garden under two sun
protection treatments (i.e., black mesh shelter, and kaolin at 6% concentration), and a control treatment at full
sun. In Trial 2, a local provenance was established under two site preparation treatments (i.e., old subsoiling
from 4 years ago versus no-subsoiling). Growth, survival, gas exchange, and Chlorophyll fluorescence parameters
were measured one year after outplanting. In Trial 1 survival was similar among treatments but larger seedlings
were found under kaolin and in the local provenance Empedrado. The provenances varied by sun protection
treatment in survival, and the Pre Andean provenance Linares tended to show the lowest survival at full sun. At
the leaf-level physiology, provenances responded similarly in gas exchange and fluorescence parameters. In the
sun protection treatments seedlings under kaolin increased stomatal conductance and electron transport, but
decreased photosynthesis, water use efficiency, and efficiency of PSII. Provenances also varied by treatment in
physiology. The Empedrado provenance exhibited the highest transpiration and stomatal conductance under
kaolin whereas the Pre Andean provenance of Longaví showed the lowest photosynthesis and efficiency of PSII in
the kaolin treatment. In Trial 2, root collar diameter, intercellular CO2 and water use efficiency were higher in
the old-subsoiling treatment. As a potential adaptation tool, seed sources from Pre Andean origins can be
established in Coastal origins with no detriments on seedling survival.
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Attribution-NonCommercial-NoDerivs 3.0 United States