However, map positions of these genes have not been determined. The possibility that these genes are candidate genes for Qga.caas-1DL and Qga.caas-7BL remains unknown. To understand the synthesis of starch granules, more traits, such as diameter, number and weight of starch granules should be examined. GSK2118436 chemical structure Starch granule development can be divided into two stages, formation of the starch granule nuclei and
development of the nuclei into A and B granules [7]. The enzymes mentioned above may have different functions in the two phases, or there may be other enzymes regulating starch granule initiation and development. This should be verified by expression analysis of starch biosynthesis enzymes combined with dynamic changes during granule development. Exploring the mechanism of starch granule formation and the driving key enzymes will help develop cultivars with desirable
quality characteristics through genetic engineering and marker-assisted selection. The isolation method has a significant effect on starch granules. We dried wet starch by 40 °C treatment and lyophilization. Compared to high temperature drying, lyophilization produced more starch (1–35 μm) up to 90% or even 100%, with less peaks beyond 35 μm. The latter may be caused by aggregation of small starch granules that are difficult to separate after drying. Despite significant environmental effects, starch granule size distribution can be genetically determined. Fine mapping and discovering novel genes are feasible and fundamental for further study and eventually for breeding high quality Gefitinib cost cultivars. The study was supported by the National Natural Science Foundation of China (31171547) and China Agriculture
Research System (CARS-3-1-3). “
“Brassinosteroids (BRs) are a class of steroid compounds involved in diverse biological processes during plant growth and development, including seed size and germination, stem elongation, plant height regulation, vascular differentiation, reproductive development, flowering time, male fertility, photomorphogenesis, and stress response [1], [2], [3], [4], [5], [6], [7], [8] and [9]. A few BR-deficient or -insensitive mutants have been identified in Arabidopsis and rice, exhibiting pleiotropic phenotypes. BR-related P-type ATPase mutants in Arabidopsis showed a distinctive dwarf phenotype with dark green leaves and exhibited defects in hypocotyl elongation and cotyledon closing when grown in darkness [10], [11], [12] and [13]. The rice BR-related mutants showed dwarf phenotype, erect leaves, and small and round seeds and exhibited defects in mesocotyl elongation in darkness and leaf angle enlargement in the lamina joint inclination assay [3], [4] and [14]. In plants BRs are perceived at the cell surface by a member of the large family of leucine-rich repeat receptor-like kinases (LRR-RLKs), namely BRASSINOSTEROID INSENSITIVE 1 (BRI1) [15], [16] and [17].