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Title: High light and temperature reduce photosynthetic efficiency through different mechanisms in the C4 model Setaria viridis

Journal Article · · Communications Biology
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  1. Donald Danforth Plant Science Center, St. Louis, MO (United States)
  2. Donald Danforth Plant Science Center, St. Louis, MO (United States); Washington Univ., St. Louis, MO (United States)
  3. Univ. of California, Berkeley, CA (United States)
  4. Purdue Univ., West Lafayette, IN (United States)
  5. Univ. of Delaware, Newark, DE (United States); Univ. Nacional Autonoma de Mexico (UNAM), Mexico City (Mexico)
  6. Univ. of Cambridge (United Kingdom)
  7. Univ. of California, Berkeley, CA (United States); Howard Hughes Medical Inst., Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  8. Univ. of Delaware, Newark, DE (United States)

C4 plants frequently experience high light and high temperature conditions in the field, which reduce growth and yield. However, the mechanisms underlying these stress responses in C4 plants have been under-explored, especially the coordination between mesophyll (M) and bundle sheath (BS) cells. We investigated how the C4 model plant Setaria viridis responded to a four-hour high light or high temperature treatment at photosynthetic, transcriptomic, and ultrastructural levels. Although we observed a comparable reduction of photosynthetic efficiency in high light or high temperature treated leaves, detailed analysis of multi-level responses revealed important differences in key pathways and M/BS specificity responding to high light and high temperature. We provide a systematic analysis of high light and high temperature responses in S. viridis, reveal different acclimation strategies to these two stresses in C4 plants, discover unique light/temperature responses in C4 plants in comparison to C3 plants, and identify potential targets to improve abiotic stress tolerance in C4 crops.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1825016
Journal Information:
Communications Biology, Journal Name: Communications Biology Journal Issue: 1 Vol. 4; ISSN 2399-3642
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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