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The promoter of TL-DNA gene 5 controls the tissue-specific expression of chimaeric genes carried by a novel type of Agrobacterium binary vector
It was found that the gene 5 promoter is active in a tissue-specific fashion whereas this is not the case for the NOS promoter, providing the first documented instance of a gene derived from a procaryotic host the expression of which is apparently regulated by plant growth factors. Expand
Brassinosteroids Rescue the Deficiency of CYP90, a Cytochrome P450, Controlling Cell Elongation and De-etiolation in Arabidopsis
Brassinosteroids compensate for different cell elongation defects of Arabidopsis det, cop, fus, and axr2 mutants, indicating that these steroids play an essential role in the regulation of plant development. Expand
Polyamines: molecules with regulatory functions in plant abiotic stress tolerance
The integration of polyamines with other metabolic pathways is discussed by focusing on molecular mechanisms of their action in abiotic stress tolerance by integrating with processes of reactive oxygen species (ROS) signalling, generation of nitric oxide, modulation of ion channel activities and Ca2+ homeostasis. Expand
Duplicated P5CS genes of Arabidopsis play distinct roles in stress regulation and developmental control of proline biosynthesis.
The genetic characterization of p5cs insertion mutants is described, which indicates that P5CS1 is required for proline accumulation under osmotic stress, and that P4CS2 is insufficient for compensation of developmental defects caused by inactivation of P5 CS2. Expand
EIN3-Dependent Regulation of Plant Ethylene Hormone Signaling by Two Arabidopsis F Box Proteins EBF1 and EBF2
This work places two Arabidopsis F box proteins called EBF1 and EBF2 within the genetic framework of the ethylene-response pathway and supports a model in which ethylene action depends on EIN3 protein stabilization. Expand
Differential expression of two P5CS genes controlling proline accumulation during salt-stress requires ABA and is regulated by ABA1, ABI1 and AXR2 in Arabidopsis.
Induction of AtP5CS1 mRNA accumulation in salt-treated seedlings involves an immediate early transcriptional response regulated by ABA signalling that is not inhibited by cycloheximide, but abolished by the deficiency of ABA biosynthesis in the aba1 Arabidopsis mutant. Expand
Functional Specialization amongst the Arabidopsis Toc159 Family of Chloroplast Protein Import Receptors
Arabidopsis knockout mutants for each Toc159 subtype characterized had strong visible phenotypes, but toc132 toc120 double homozygotes appeared similar to toc159, indicating redundancy between atToc132 and atTOC120, and transgenic complementation studies confirmed this redundancy. Expand
Pleiotropic control of glucose and hormone responses by PRL1, a nuclear WD protein, in Arabidopsis.
The prl1 mutation localized by T-DNA tagging on Arabidopsis chromosome 4-44 confers hypersensitivity to glucose and sucrose. The prl1 mutation results in transcriptional derepression of glucoseExpand
Regulatory interaction of PRL1 WD protein with Arabidopsis SNF1-like protein kinases.
It is found that the activation level of AKIN immunocomplexes is higher in the prl1 mutant, suggesting that PRL1 is a negative regulator of Arabidopsis SNF1 homologs, and the observation that PR l1 is an inhibitor of AKin10 and AKIN11 in vitro is supported. Expand
Functional diversification of closely related ARF-GEFs in protein secretion and recycling
The results suggest that large ARF-GEFs of the GBF1 class perform a conserved role in endoplasmic reticulum–Golgi trafficking and secretion, which is done by GNL1 and GNOM in Arabidopsis, whereas GNOM has evolved to perform an additional plant-specific function of recycling from endosomes to the plasma membrane. Expand