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

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 fo...

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Veröffentlicht in:New forests 2023-05, Vol.54 (3), p.421-437
Hauptverfasser: Rovida Kojima, Elisa Akemi, Gonzalez, Carina Verónica, Mundo, Ignacio Alberto, Guevara, Aranzazú, Biruk, Lucia Nadia, Giordano, Carla Valeria
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Sprache:eng
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Zusammenfassung: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.
ISSN:0169-4286
1573-5095
DOI:10.1007/s11056-022-09929-7