Abstract：
:Recent activities to improve photosynthetic performance in crop plants has focused mainly on C3 photosynthesis where there are clear identified targets such as improving Rubisco kinetics, installation of a CO2 concentrating mechanism and alleviating limitations in chloroplast electron transport. Here we address strategies to improve photosynthetic performance in C4 plants, which utilize a CO2 concentrating mechanism, having evolved a complex blend of anatomy and biochemistry to achieve this. While the limitations to photosynthetic flux are not as well studied in C4 plants, work in transgenic Flaveria bidentis, a transformable model C4 dicot, and recent transcriptional analysis of leaves from diverse C4 plants, provides several gene candidates for improvement of carbon metabolism (such as pyruvate orthophosphate dikinase, phosphoenolpyruvate carboxylase and Rubisco) and for access of CO2 to phosphoenolpyruvate carboxylase in the mesophyll cells (such as carbonic anhydrase and CO2 porins). Chloroplast electron transport in C4 plants is shared between the two cell types, providing opportunities not only to alleviate limitations to flux through intersystem electron transport by targeting nuclear encoded proteins in the cytochrome (Cyt) b6/f complex, but in better sharing the harvesting of light energy between mesophyll and bundle sheath chloroplasts. Gene candidates for improvement of C4 photosynthesis could be utilized either through transgenic approaches or via mining natural allelic variation in sequenced populations of crop species.
journal_name
Curr Opin Plant Bioljournal_title
Current opinion in plant biologyauthors
von Caemmerer S,Furbank RTdoi
10.1016/j.pbi.2016.04.003subject
Has Abstractpub_date
2016-06-01 00:00:00pages
125-34eissn
1369-5266issn
1879-0356pii
S1369-5266(16)30060-7journal_volume
31pub_type
杂志文章,评审abstract：:WRKY proteins comprise a large family of transcription factors. Despite their dramatic diversification in plants, WRKY genes seem to have originated in early eukaryotes. The cognate DNA-binding site of WRKY factors is well defined, but determining the roles of individual family members in regulating specific transcrip...
journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
pub_type： 杂志文章,评审
doi：10.1016/j.pbi.2011.03.003
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
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journal_title：Current opinion in plant biology
pub_type： 杂志文章,评审
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journal_title：Current opinion in plant biology
pub_type： 杂志文章,评审
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journal_title：Current opinion in plant biology
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