Climate‐resilient agroforestry: physiological responses to climate change and engineering of crassulacean acid metabolism (CAM) as a mitigation strategy
- 15 December 2014
- journal article
- review article
- Published by Wiley in Plant, Cell & Environment
- Vol. 38 (9), 1833-1849
- https://doi.org/10.1111/pce.12479
Abstract
Global climate change threatens the sustainability of agriculture and agroforestry worldwide through increased heat, drought, surface evaporation and associated soil drying. Exposure of crops and forests to warmer and drier environments will increase leaf:air water vapour-pressure deficits (VPD), and will result in increased drought susceptibility and reduced productivity, not only in arid regions but also in tropical regions with seasonal dry periods. Fast-growing, short-rotation forestry (SRF) bioenergy crops such as poplar (Populus spp.) and willow (Salix spp.) are particularly susceptible to hydraulic failure following drought stress due to their isohydric nature and relatively high stomatal conductance. One approach to sustaining plant productivity is to improve water-use efficiency (WUE) by engineering crassulacean acid metabolism (CAM) into C3 crops. CAM improves WUE by shifting stomatal opening and primary CO2 uptake and fixation to the night-time when leaf:air VPD is low. CAM members of the tree genus Clusia exemplify the compatibility of CAM performance within tree species and highlight CAM as a mechanism to conserve water and maintain carbon uptake during drought conditions. The introduction of bioengineered CAM into SRF bioenergy trees is a potentially viable path to sustaining agroforestry production systems in the face of a globally changing climate.Funding Information
- US DOE Contract (DE–AC05–00OR22725)
- US DOE Contract (DE-SC0008834)
This publication has 102 references indexed in Scilit:
- Hot days induced by precipitation deficits at the global scaleProceedings of the National Academy of Sciences of the United States of America, 2012
- Molecular evolution of genes recruited into C4 photosynthesisTrends in Plant Science, 2012
- The roles of hydraulic and carbon stress in a widespread climate-induced forest die-offProceedings of the National Academy of Sciences of the United States of America, 2011
- Widespread crown condition decline, food web disruption, and amplified tree mortality with increased climate change-type droughtProceedings of the National Academy of Sciences of the United States of America, 2011
- Forest responses to increasing aridity and warmth in the southwestern United StatesProceedings of the National Academy of Sciences of the United States of America, 2010
- Driving forces of global wildfires over the past millennium and the forthcoming centuryProceedings of the National Academy of Sciences of the United States of America, 2010
- The genome of the domesticated apple (Malus × domestica Borkh.)Nature Genetics, 2010
- Genetic Variation of Stomatal Traits and Carbon Isotope Discrimination in Two Hybrid Poplar Families (Populus deltoides ‘S9-2’ × P. nigra ‘Ghoy’ and P. deltoides ‘S9-2’ × P. trichocarpa ‘V24’)Annals of Botany, 2008
- Climate change impacts on forestryProceedings of the National Academy of Sciences of the United States of America, 2007
- The grapevine genome sequence suggests ancestral hexaploidization in major angiosperm phylaNature, 2007