Title: Biosystems Design to Accelerate C 3 -to-CAM Progression

Journal Article · · BioDesign Research
ORCiD logo [1];  [2];  [3];  [4];  [5];  [5];  [6]; ORCiD logo [7]; ORCiD logo [8];  [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1]
  1. Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA, The Center for Bioenergy Innovation, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
  2. Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA, The Center for Bioenergy Innovation, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA, Department of Genetics and Plant Breeding, Patuakhali Science and Technology University, Dumki, Patuakhali 8602, Bangladesh
  3. Department of Genetics, Cell Biology and Development, Center for Precision Plant Genomics, and Center for Genome Engineering, University of Minnesota, Saint Paul, MN 55108, USA
  4. Department of Applied Plant Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea
  5. Department of Biochemistry and Molecular Biology, University of Nevada, Reno, NV, USA
  6. Department of Plant Biology, University of California, Davis, Davis, CA, USA
  7. Department of Plant Biology, University of California, Davis, Davis, CA, USA, Feedstocks Division, Joint BioEnergy Institute, Emeryville, CA, USA
  8. Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA

Global demand for food and bioenergy production has increased rapidly, while the area of arable land has been declining for decades due to damage caused by erosion, pollution, sea level rise, urban development, soil salinization, and water scarcity driven by global climate change. In order to overcome this conflict, there is an urgent need to adapt conventional agriculture to water-limited and hotter conditions with plant crop systems that display higher water-use efficiency (WUE). Crassulacean acid metabolism (CAM) species have substantially higher WUE than species performing C 3 or C 4 photosynthesis. CAM plants are derived from C 3 photosynthesis ancestors. However, it is extremely unlikely that the C 3 or C 4 crop plants would evolve rapidly into CAM photosynthesis without human intervention. Currently, there is growing interest in improving WUE through transferring CAM into C 3 crops. However, engineering a major metabolic plant pathway, like CAM, is challenging and requires a comprehensive deep understanding of the enzymatic reactions and regulatory networks in both C 3 and CAM photosynthesis, as well as overcoming physiometabolic limitations such as diurnal stomatal regulation. Recent advances in CAM evolutionary genomics research, genome editing, and synthetic biology have increased the likelihood of successful acceleration of C 3 -to-CAM progression. Here, we first summarize the systems biology-level understanding of the molecular processes in the CAM pathway. Then, we review the principles of CAM engineering in an evolutionary context. Lastly, we discuss the technical approaches to accelerate the C 3 -to-CAM transition in plants using synthetic biology toolboxes.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
National Research Foundation of Korea (NRF); National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231; AC05-00OR22725; SC0008834
OSTI ID:
1909316
Journal Information:
BioDesign Research, Journal Name: BioDesign Research Vol. 2020; ISSN 2693-1257
Publisher:
ElsevierCopyright Statement
Country of Publication:
India
Language:
English

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