title: Source-Sink Communication: Regulated by Hormone, Nutrient, and Stress Cross-Signaling.
abstract: Communication between source organs (exporters of photoassimilates) and sink organs (importers of fixed carbon) has a pivotal role in carbohydrate assimilation and partitioning during plant growth and development. Plant productivity is enhanced by sink strength and source activity, which are regulated by a complex signaling network encompassing sugars, hormones, and environmental factors. However, key components underlying the signaling pathways that regulate source-sink communication are only now beginning to be discovered. Here, we discuss recent advances in our understanding of the molecular mechanisms regulating sugar mobilization during seed development and seedling establishment in cereals, which provide the majority of nutrition for humans. Insights into these mechanisms may provide strategies for improving crop productivity.
authors.affiliation: Institute of Molecular Biology, Academia Sinica, Nankang, Taipei 115, Taiwan, ROC; Agricultural Biotechnology Center, National Chung Hsing University, Taichung 402, Taiwan, ROC; Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan, ROC. Electronic address: sumay@imb.sinica.edu.tw.
authors.forename: Su-May
authors.initials: SM
authors.lastname: Yu
authors.affiliation: Institute of Molecular Biology, Academia Sinica, Nankang, Taipei 115, Taiwan, ROC; Agricultural Biotechnology Center, National Chung Hsing University, Taichung 402, Taiwan, ROC.
authors.forename: Shuen-Fang
authors.initials: SF
authors.lastname: Lo
authors.affiliation: Agricultural Biotechnology Center, National Chung Hsing University, Taichung 402, Taiwan, ROC; Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan, ROC; Institute of Plant and Microbial Biology, Academia Sinica, Nankang, Taipei 115, Taiwan, ROC.
authors.forename: Tuan-Hua David
authors.initials: TD
authors.lastname: Ho
mesh_terms: D050260:Carbohydrate Metabolism; D002241:Carbohydrates; D055864:Droughts; D002523:Edible Grain / Q000254:growth & development / Q000378:metabolism*; D018525:Germination; D005875:Gibberellins / Q000378:metabolism; D010788:Photosynthesis; D010937:Plant Growth Regulators / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism; D036226:Seedlings / Q000254:growth & development / Q000378:metabolism; D012639:Seeds / Q000254:growth & development* / Q000378:metabolism*; D015398:Signal Transduction; D013312:Stress, Physiological
chemical_list: D002241:Carbohydrates; D005875:Gibberellins; D010937:Plant Growth Regulators
keywords: abiotic stress; cereal; hormone; nutrient demand; sink; source