期刊
PLANT SCIENCE
卷 181, 期 3, 页码 275-281出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2011.06.001
关键词
Photosynthetic feedback; Leaf starch; ADPglucose pyrophosphorylase; Plant biomass; Arabidopsis; Oryza sativa L.
资金
- Rockefeller Foundation
- USDA-NRICGP [2001-35318-10126]
- Department of Energy [DE-FG03-96ER20216, DE-FG02-08ER20216]
- National Academy of Agricultural Science (RDA)
- National Research Foundation of Korea [과C6A2205] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Rural Development Administration (RDA), Republic of Korea [PJ00686520111131304] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Improvements in plant productivity (biomass) and yield have centered on increasing the efficiency of leaf CO(2) fixation and utilization of products by non-photosynthetic sink organs. We had previously demonstrated a correlation between photosynthetic capacity, plant growth, and the extent of leaf starch synthesis utilizing starch-deficient mutants. This finding suggested that leaf starch is used as a transient photosynthetic sink to recycle inorganic phosphate and, in turn, maximize photosynthesis. To test this hypothesis, Arabidopsis thaliana and rice (Oryza sativa L) lines were generated with enhanced capacity to make leaf starch with minimal impact on carbon partitioning to sucrose. The Arabidopsis engineered plants exhibited enhanced photosynthetic capacity; this translated into increased growth and biomass. These enhanced phenotypes were displayed by similarly engineered rice lines. Manipulation of leaf starch is a viable alternative strategy to increase photosynthesis and, in turn, the growth and yields of crop and bioenergy plants. (C) 2011 Elsevier Ireland Ltd. All rights reserved.
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