Full TGIF Record # 331633
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Web URL(s):https://scisoc.confex.com/scisoc/2020am/meetingapp.cgi/Paper/124366
    Last checked: 09/07/2023
Publication Type:
Content Type:Abstract or Summary only
Author(s):Leakey, Andrew D. B.
Author Affiliation:Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL
Title:Phenomics of stomata and water use efficiency in C4 crops
Section:Martin and Ruth Massengale lectureship
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C02 crop physiology and metabolism
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Meeting Info.:San Antonio, Texas: November 9-13, 2020
Source:ASA, CSSA, SSSA International Annual Meeting. November 2020, p. 124366.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Water use efficiency (WUE), which is physiologically distinct from drought tolerance, is a key target for improving crop productivity, resilience and sustainability. This is because water availability is the primary limitation to crop yield globally and irrigation uses the largest fraction of our limited freshwater supply. The exchange of water and CO2 between a leaf and the atmosphere is regulated by the aperture and pattern of stomata. Mechanistic modeling indicates that stomatal conductance could be reduced or stomatal movements accelerated to improve water use efficiency in important C4 crops such maize and sorghum. While molecular genetics has revealed much, knowledge of the genetic and physiological control of WUE by stomatal traits in C4 crops is still poor. Understanding of natural diversity in stomatal traits is limited by the lack of high-throughput phenotyping methods. Two novel phenotyping platforms were developed. First, a rapid method to assess stomatal patterning in three model C4 species grown in the field maize, sorghum and setaria has been implemented. The leaf surface is scanned in less than two minutes with an optical tomographer, generating a quantitative measurement of a patch of the leaf surface. An algorithm was designed to automatically detect stomata in 10,000s of these images via training of a neural network approach. Second, a thermal imaging strategy, to rapidly screen the kinetics of stomatal closure in response to light has been developed. We identified genotype to phenotype associations for stomatal patterning, leaf gas exchange and canopy water use through quantitative trait loci and genome wide association studies. Transgenically modified expression of stomatal patterning genes has produced sorghum with greater WUE. These plants and natural variants were grown in a new field facility for comprehensive evaluation of leaf, root and canopy WUE traits under Midwest growing conditions and an indoor high-throughput phenotyping facility."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Leakey, A. D. B. 2020. Phenomics of stomata and water use efficiency in C4 crops. Agron. Abr. p. 124366.
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    Last checked: 09/07/2023
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