1,721,095 research outputs found
The PRK/Rubisco shunt strongly influences Arabidopsis seed metabolism and oil accumulation, affecting more than carbon recycling
Get PDFISSN:1040-4651ISSN:1531-298XISSN:1532-298XISSN:1531-298XISSN:1532-298
Carbon assimilation in Arabidopsis thaliana rosettes and its partitioning in mature and developing leaves
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Identification of proteins involved in FLU-dependent control of tetrapyrrole biosynthesis
No full textCharacterisation of debranchin enzymes involved in starch biosynthesis in Arabidopsis thaliana leaves
No full textPost-Translational and Transcriptional Regulation of Storage Glucan Metabolism in Model and Non-Model Plants
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Starch degradation
No full textRecent research reveals that starch degradation in Arabidopsis leaves at night is significantly different from the ``textbook'' version of this process. Although parts of the pathway are now understood, other parts remain to be discovered. Glucans derived from starch granules are hydrolyzed via beta-amylase to maltose, which is exported from the chloroplast. In the cytosol maltose is the substrate for a transglucosylation reaction, producing glucose and a glucosylated acceptor molecule. The enzyme that attacks the starch granule to release glucans is not known, nor is the nature of the cytosolic acceptor molecule. An Arabidopsis-type pathway may operate in leaves of other species, and in nonphotosynthetic organs that accumulate starch transiently. However, in starch-storing organs such as cereal endosperms and legume seeds, the process differs from that in Arabidopsis and may more closely resemble the textbook pathway. We discuss the differences in relation to the biology of each system
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