We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Impact of drought on productivity and water use efficiency in 29 genotypes of Populus deltoides×Populus nigra.
- Authors
Monclus, Romain; Dreyer, Erwin; Villar, Marc; Delmotte, Francis M.; Delay, Didier; Petit, Jean‐Michel; Barbaroux, Cécile; Le Thiec, Didier; Bréchet, Claude; Brignolas, Franck
- Abstract
Summary: • We examined the relationships among productivity, water use efficiency (WUE) and drought tolerance in 29 genotypes of Populus × euramericana (Populus deltoides×Populus nigra), and investigated whether some leaf traits could be used as predictors for productivity, WUE and drought tolerance.• At Orléans, France, drought was induced on one field plot by withholding water, while a second plot remained irrigated and was used as a control. Recorded variables included stem traits (e.g. biomass) and leaf structural (e.g. leaf area) and functional traits [e.g. intrinsic water use efficiency (Wi) and carbon isotope discrimination (Δ)].• Productivity and Δ displayed large genotypic variability and were not correlated. Δ scaled negatively with Wi and positively with stomatal conductance under moderate drought, suggesting that the diversity for Δ was mainly driven by stomatal conductance.• Most of the productive genotypes displayed a low level of drought tolerance (i.e. a large reduction of biomass), while the less productive genotypes presented a large range of drought tolerance. The ability to increase WUE in response to water deficit was necessary but not sufficient to explain the genotypic diversity of drought tolerance. New Phytologist (2006) 169 : 753–763 © The Authors (2005). Journal compilation © New Phytologist (2005) doi : 10.1111/j.1469-8137.2005.01630.x -->
- Subjects
FRANCE; WATER efficiency; BLACK poplar; DROUGHT tolerance; CARBON isotopes; GENOTYPES; LEAF area
- Publication
New Phytologist, 2006, Vol 169, Issue 4, p765
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1111/j.1469-8137.2005.01630.x