Differential responses of Populus deltoides and Populus × canadensis clones to short-term water deficit

• Published in: New Forests
• Main Authors: Rovida Kojima, Elisa Akemi, Gonzalez, Carina Veronica, Mundo, Ignacio Alberto, Guevara, Aranzazù, Biruk, Lucia Nadia, Giordano, Carla Valeria
• Format: Article in Journal/Newspaper
• Language: English
• Published: Springer
• Subjects: DROUGHT TOLERANCE; DRYLAND FORESTRY; LEAF GROWTH; POPLAR CLONES; STOMATAL CONTROL; WATER RELATIONS; https://purl.org/becyt/ford/4.1; https://purl.org/becyt/ford/4; Argentino; Argentina; Gonzalez; dvina
• Online Access: http://hdl.handle.net/11336/198680

Populus spp. are among the fast-growing tree species most prone to water deficit. The use of drought-resistant clones allows mitigating the negative effects of water deficit on the establishment and the productivity of unstable irrigated plantations in dryland areas. We evaluated the responses of four Populus × canadensis (‘Conti 12’, ‘Guardi’, ‘I-214’ and ‘I45/51’) and four Populus deltoides (‘Stoneville 67’, ‘Catfish 2’, ‘Dvina’ and ‘Australiano 129/60’) clones to a short-term water stress. Three water treatments were imposed on 6-month-old plants: well-watered (WW), 5 days of irrigation withdrawal followed by rewatering (−5 + RW), and 9 days of irrigation withdrawal followed by rewatering (−9 + RW). Populus clones presented different strategies to face water deficit, resulting in variable effects on plant growth. The small-leaved clone ‘Australiano 129/60’ showed strong stomatal control and maintained a high increase in leaf area during the water-shortage period. These strategies were associated with high relative growth under both water-shortage treatments. ‘Australiano 129/60’ showed to be a drought-resistant clone with the highest growth under both water-shortage treatments, appearing to be a promising clone for production in environments prone to short-term water stress. Fil: Rovida Kojima, Elisa Akemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; Argentina Fil: Gonzalez, Carina Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Biología Agrícola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de Biología Agrícola de Mendoza; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y ...