Evaluation of flooding tolerance in cuttings of Populus clones used for forestation at the Paraná River Delta, Argentina

  • VMC Luquez
  • FG Achinelli
  • S Cortizo

Abstract

We analysed the responses to flooding of 14 poplar clones used for forestation  at the Paraná River Delta, Argentina. Some are commercial clones planted in the  area, and others belong to a poplar breeding program from the National Institute of Agricultural Technology (INTA) in Argentina. Potted plants of 60 cm high growing in a greenhouse were watered (control) or submerged in water 10 cm above soil level (flooding treatment) for 35 d. Flooding reduced growth in  height and diameter (combined as the volume index), total leaf area, photosynthesis (measured as electron transport rate) and stomatal conductance. In flooded plants, the number and area of newly formed leaves were also reduced. In some clones, flooding accelerated the senescence of basal leaves and induced the development of adventitious roots. A hierarchical cluster analysis  was performed to classify the responses of the clones to flooding. Evaluating flooding tolerance as less reduction in growth and retention of a higher leaf area under flooding conditions, three groups with different degrees of flooding tolerance were identified: clone Alton was the most tolerant; clones A129-60, A106-60, SIA 22-85, Catfish 2 and 150-82 showed intermediate tolerance; and the remainder of the clones had low flooding tolerance. This information will be useful to recommend clones to be planted in flood-prone areas, and to select  parents to be used in breeding programs.

Southern Forests 2012, 74(1): 61–70

Author Biographies

VMC Luquez
Instituto de Fisiología Vegetal, CONICET La Plata – FCAyF UNLP, CC 327, 1900 La Plata, Argentina
FG Achinelli
Instituto de Fisiología Vegetal, CONICET La Plata – FCAyF UNLP, CC 327, 1900 La Plata, Argentina; Comisión de Investigaciones Científicas, Calle 526 entre 10 y 11, 1900 La Plata, Argentina
S Cortizo
INTA Delta, Río Paraná de Las Palmas y Canal Laurentino Comas, 2804 Campana, Argentina
Section
Articles

Journal Identifiers


eISSN: 2070-2639
print ISSN: 2070-2620