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Title: Climate-resilient agroforestry: physiological responses to climate change and engineering of crassulacean acid metabolism (CAM) as a mitigation strategy: CAM engineering in trees

Abstract

We know that 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 CO 2 uptake and fixation to the night-time when leaf:air VPD is low. CAMmembers 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. Moreover, 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 changingmore » climate.« less

Authors:
 [1];  [2];  [2];  [3];  [2];  [2];  [4]
  1. Newcastle Univ. (United Kingdom); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Liverpool (United Kingdom)
  4. Univ. of Nevada, Reno, NV (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1265703
Grant/Contract Number:  
AC05-00OR22725; SC0008834
Resource Type:
Accepted Manuscript
Journal Name:
Plant, Cell and Environment
Additional Journal Information:
Journal Volume: 38; Journal Issue: 9; Journal ID: ISSN 0140-7791
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CO2; carbon reactions; drought; global climate change; photosynthesis; stomata; water relations; water-use efficiency

Citation Formats

Borland, Anne M., Wullschleger, Stan D., Weston, David J., Hartwell, James, Tuskan, Gerald A., Yang, Xiaohan, and Cushman, John C. Climate-resilient agroforestry: physiological responses to climate change and engineering of crassulacean acid metabolism (CAM) as a mitigation strategy: CAM engineering in trees. United States: N. p., 2014. Web. doi:10.1111/pce.12479.
Borland, Anne M., Wullschleger, Stan D., Weston, David J., Hartwell, James, Tuskan, Gerald A., Yang, Xiaohan, & Cushman, John C. Climate-resilient agroforestry: physiological responses to climate change and engineering of crassulacean acid metabolism (CAM) as a mitigation strategy: CAM engineering in trees. United States. doi:10.1111/pce.12479.
Borland, Anne M., Wullschleger, Stan D., Weston, David J., Hartwell, James, Tuskan, Gerald A., Yang, Xiaohan, and Cushman, John C. Mon . "Climate-resilient agroforestry: physiological responses to climate change and engineering of crassulacean acid metabolism (CAM) as a mitigation strategy: CAM engineering in trees". United States. doi:10.1111/pce.12479. https://www.osti.gov/servlets/purl/1265703.
@article{osti_1265703,
title = {Climate-resilient agroforestry: physiological responses to climate change and engineering of crassulacean acid metabolism (CAM) as a mitigation strategy: CAM engineering in trees},
author = {Borland, Anne M. and Wullschleger, Stan D. and Weston, David J. and Hartwell, James and Tuskan, Gerald A. and Yang, Xiaohan and Cushman, John C.},
abstractNote = {We know that 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. CAMmembers 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. Moreover, 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.},
doi = {10.1111/pce.12479},
journal = {Plant, Cell and Environment},
number = 9,
volume = 38,
place = {United States},
year = {2014},
month = {12}
}

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Works referenced in this record:

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