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More than taking the heat: crops and global change

Permanent URL:
http://handle.nal.usda.gov/10113/43307
File:
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Abstract:
Grain production per unit of land will need to more than double over this century to address rising population and demand. This at a time when the procedures that have delivered increased yields over the past 50 years may have reached their ceiling for some of the world's most important crops. Rising global temperature and more frequent droughts will act to drive down yields. The projected rise in atmospheric [CO₂] by mid-century could in theory increase crop photosynthesis by over 30%, but this is not realized in grain yields in current C₃ cultivars in the field. Emerging understanding of gene networks controlling responses to these environmental changes indicates biotechnological opportunities for adaptation. Considerably more basic research, particularly under realistic field conditions, is critical before these opportunities can be adequately understood and validated. Given the time needed between discovery in a model plant species and translation to traits or stacked changes in a commercial grain crop cultivar, there is an urgent need to vigorously pursue and develop these opportunities now.
Author(s):
Long, Stephen P. , Ort, Donald R.
Subject(s):
grain crops , climate change , air temperature , heat tolerance , grain yield , drought , water stress , carbon dioxide , elevated atmospheric gases , literature reviews , photosynthesis , C3 plants , genome , genomics , genes , biochemical pathways , plant adaptation , cultivars
Format:
p. 240-247.
Note:
In the special issue: Physiology and metabolism / edited by Wolf B. Frommer and Ewe Sonnewald.
Source:
Current opinion in plant biology 2010 June, v. 13, no. 3
Language:
English
Publisher:
[Oxford, UK]: Pergamon: Elsevier Science
Year:
2010
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.