%0 Journal Article
%T Do greenhouse experiments predict willow responses to long term flooding events in the field?  Los experimentos en invern芍culo predicen las respuestas de sauces a per赤odos largos de inundaci車n a campo?
%A Teresa Cerrillo
%A Mar赤a E Rodr赤guez
%A Fabio Achinelli
%A Guillermo Doffo
%J Bosque (Valdivia)
%D 2013
%I Universidad Austral de Chile
%X Flooding tolerance should be included as a trait in breeding programs in forested areas where extreme flooding events lasting several months can occur. In this context, it is difficult to carry out controlled, long-term flooding experiments with big trees due to the large number of specimens to screen. The hypothesis in this work was that a relatively short-term flooding experiment in a greenhouse would be useful to select clones capable of enduring long term flooding events in the field. The survival of 4 willow clones in a long term, 12 years field trial that was subjected twice to long term flooding events, was compared with the survival, growth and gas exchange of those same clones subjected to flooding in the greenhouse for three months. There were differences in flooding survival in the field: clone AN4 showed a 100 % survival, followed by clone 395 (43 %), clone 131-27 (18 %) and clone 13-44 (14 %). In the greenhouse, all plants survived and only flooded plants of clone 13-44 experienced a statistically significant growth and stomatal conductance reduction. The food tolerance ranking in the field and in the greenhouse only partially overlapped; the worst clone in the field could be identified in the short-term greenhouse experiment, though the best one could not. It was not possible to identify clones with tolerance to long-term flooding episodes in the field. Nevertheless, the greenhouse results were useful to identify clones showing flooding sensitivity and tolerance to short term flooding episodes. Es necesario incluir la tolerancia a la inundaci車n como un car芍cter en programas de mejoramiento para zonas forestadas donde eventos extremos de inundaci車n que pueden durar meses son comunes. En este contexto, es dif赤cil llevar a cabo experimentos controlados de larga duraci車n con 芍rboles de gran tama o, debido al elevado n迆mero de ejemplares que es necesario evaluar. La hip車tesis de este trabajo fue que un experimento relativamente corto de inundaci車n en el invern芍culo ser赤a 迆til para seleccionar clones capaces de soportar eventos de inundaci車n de varios meses en el campo. Se compar車 la supervivencia de cuatro clones de sauces en un ensayo a campo que experiment車 dos episodios largos de inundaci車n a lo largo de 12 a os, y la supervivencia, crecimiento e intercambio gaseoso de los mismos clones inundados por tres meses en invern芍culo. Se encontraron diferencias en la supervivencia en el ensayo a campo, del clon AN4 sobrevivieron el 100 % de las plantas, seguido por el clon 395 (43 %), clon 131-27 (18 %) y clon 13-44 (14 %). En el invern芍culo, todas
%K Salix spp
%K supervivencia
%K crecimiento
%K Delta del Paran芍
%K Salix spp
%K survival
%K growth
%K Paran芍 River Delta
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002013000100009