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Most deciduous fruit trees cultivated in the temperate zone require a genotype-dependent amounts of chilling exposure for dormancy release and bud break. In Japanese apricot (Prunus mume), DORMANCY-ASSOCIATED MADS-box 6 (PmDAM6) may influence chilling-mediated dormancy release and bud break. In this study, we attempted to elucidate the biological functions of PmDAM6 related to dormancy regulation by analyzing PmDAM6-overexpressing transgenic apple (Malus spp.). We generated 35
PmDAM6 lines and chemically inducible overexpression lines, 35
PmDAM6-GR. In both overexpression lines, shoot growth was inhibited and early bud set was observed. In addition, PmDAM6 expression repressed bud break competency during dormancy and delayed bud break. Moreover, PmDAM6 expression increased abscisic acid levels and decreased cytokinins contents during the late dormancy and bud break stages in both 35
PmDAM6 and 35
PmDAM6-GR. Our analysis also suggested that abscisic acid levels increased during dormancy but subsequently decreased during dormancy release whereas cytokinins contents increased during the bud break stage in dormant Japanese apricot buds. We previously revealed that PmDAM6 expression is continuously down-regulated during dormancy release toward bud break in Japanese apricot. The PmDAM6 expression pattern was concurrent with a decrease and increase in the abscisic acid and cytokinins contents, respectively, in dormant Japanese apricot buds. Therefore, we hypothesize that PmDAM6 represses the bud break competency during dormancy and bud break stages in Japanese apricot by modulating abscisic acid and cytokinins accumulation in dormant buds.
This article was published in the following journal.
Name: PloS one
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A Study Evaluating the Safety, Pharmacokinetics, and Anti-tumor Activity of ABBV-321 in Subjects With Advanced Solid Tumors Associated With Overexpression of the Epidermal Growth Factor Receptor (EGFR) or Its Ligands
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A plant species in the family ROSACEAE, genus Prunus which produces edible seeds called almonds.
Retrovirus-associated DNA sequences (v-sis) originally isolated from the simian sarcoma virus (SSV). The proto-oncogene c-sis codes for a growth factor which is the B chain of PLATELET-DERIVED GROWTH FACTOR. v-sis or overexpression of c-sis causes tumorigenesis. The human sis gene is located at 22q12.3-13.1 on the long arm of chromosome 22.
One of the six homologous proteins that specifically bind insulin-like growth factors (SOMATOMEDINS) and modulate their mitogenic and metabolic actions. The function of this protein is not completely defined. However, several studies demonstrate that it inhibits IGF binding to cell surface receptors and thereby inhibits IGF-mediated mitogenic and cell metabolic actions. (Proc Soc Exp Biol Med 1993;204(1):4-29)
A transcription factor characterized by N-terminal and C-terminal CYS2-HIS2 ZINC FINGERS separated by a homeobox. It represses the expression of E-CADHERIN to induce the EPITHELIAL-MESENCHYMAL TRANSITION. It also represses PROTO-ONCOGENE PROTEINS C-BCL-6; regulates the cell type-specific expression of SODIUM-POTASSIUM-EXCHANGING ATPASE; and promotes neuronal differentiation.
Cellular DNA-binding proteins encoded by the sis gene (GENES, SIS). c-sis proteins make up the B chain of PLATELET-DERIVED GROWTH FACTOR. Overexpression of c-sis causes tumorigenesis.
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Recombinant DNA is the formation of a novel DNA sequence by the formation of two DNA strands. These are taken from two different organisms. These recombinant DNA molecules can be made with recombinant DNA technology. The procedure is to cut the DNA of ...