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Brassinolide may control aquaporin activities in Arabidopsis thaliana.

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It is usually assumed that aquaporins present in the cellular membranes could be an important route in the control of water flux in plants, but evidence for this hypothesis is scarce. In this paper, we report measurements of the osmotic permeability (P(os) of protoplasts isolated from hypocotyls of

Plant phosphatidylcholine-hydrolyzing phospholipases C NPC3 and NPC4 with roles in root development and brassinolide signaling in Arabidopsis thaliana.

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Phosphatidylcholine-hydrolyzing phospholipase C (PC-PLC) catalyzes the hydrolysis of phosphatidylcholine (PC) to generate phosphocholine and diacylglycerol (DAG). PC-PLC has a long tradition in animal signal transduction to generate DAG as a second messenger besides the classical

A fast brassinolide-regulated response pathway in the plasma membrane of Arabidopsis thaliana.

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To understand molecular processes in living plant cells, quantitative spectro-microscopic technologies are required. By combining fluorescence lifetime spectroscopy with confocal microscopy, we studied the subcellular properties and function of a GFP-tagged variant of the plasma membrane-bound

Modulatory Role of Reactive Oxygen Species in Root Development in Model Plant of Arabidopsis thaliana

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Reactive oxygen species (ROS), a type of oxygen monoelectronic reduction product, have a higher chemical activity than O₂. Although ROS pose potential risks to all organisms via inducing oxidative stress, indispensable role of ROS in individual development cannot be ignored. Among

Discovery of a nonsteroidal brassinolide-like compound, NSBR1.

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Fourteen compounds screened from 5 million compounds in silico were submitted to bioassay to find brassinolide (BL) agonists/antagonists against Arabidopsis thaliana. Of these, two N-benzoyl-N'-phenylpiperazine (NBNPP)-type compounds showed antagonistic activity; however, none showed agonistic

Transcription of DWARF4 plays a crucial role in auxin-regulated root elongation in addition to brassinosteroid homeostasis in Arabidopsis thaliana.

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The expression of DWARF4 (DWF4), which encodes a C-22 hydroxylase, is crucial for brassinosteroid (BR) biosynthesis and for the feedback control of endogenous BR levels. To advance our knowledge of BRs, we examined the effects of different plant hormones on DWF4 transcription in Arabidopsis

Arabidopsis CYP85A2, a cytochrome P450, mediates the Baeyer-Villiger oxidation of castasterone to brassinolide in brassinosteroid biosynthesis.

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The conversion of castasterone (CS) to brassinolide (BL), a Baeyer-Villiger oxidation, represents the final and rate-limiting step in the biosynthesis of BL in plants. Heterologously expressed Arabidopsis thaliana CYP85A2 in yeast mediated the conversion of CS to BL as well as the C-6 oxidation of

Multiple Reaction Monitoring Mode Based Liquid Chromatography-Mass Spectrometry Method for Simultaneous Quantification of Brassinolide and Other Plant Hormones Involved in Abiotic Stresses.

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Plant hormones are the key regulators of adaptive stress response. Abiotic stresses such as drought and salt are known to affect the growth and productivity of plants. It is well known that the levels of plant hormones such as zeatin (ZA), abscisic acid (ABA), salicylic acid (SA), jasmonic acid

Brassinosteroids regulate glucosinolate biosynthesis in Arabidopsis thaliana.

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Plants must constantly adjust their growth and defense responses to deal with the wide variety of stresses they encounter in their environment. Among phytohormones, brassinosteroids (BRs) are an important group of plant steroid hormones involved in numerous aspects of the plant lifecycle including

Brassinosteroids from seeds of Arabidopsis thaliana.

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Extracts of seeds of Arabidopsis thaliana (ecotype 24) were analysed for the presence of free and conjugated brassinosteroids. 24-epi-Brassinolide (ca 220 ng kg-1) and castasterone (ca 360 ng kg-1) could be isolated and unambiguously identified as native brassinosteroids by GC/MS.

Brassinosteroids control the proliferation of leaf cells of Arabidopsis thaliana.

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The growth of leaves in the model plant, Arabidopsis thaliana (L.) Heynh., is determined by the extent of expansion of individual cells and by cell proliferation. Mutants of A. thaliana with known defects in the biosynthesis or perception of brassinosteroids develop small leaves. When the leaves of

Brassinosteroids regulate vacuolar morphology in root meristem cells of Arabidopsis thaliana.

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Brassinosteroids (BRs) are plant hormones that regulate plant development and environmental response. Brz-insensitive-long hypocotyl4 (BIL4) was identified as a positive regulator of BR signaling that interacts with the BR receptor, BRASSINOSTEROID INSENSITIVE 1 (BRI1), and inhibits vacuolar

The effect of ascorbic acid and dehydroascorbic acid on the root gravitropic response in Arabidopsis thaliana.

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The effects of ascorbic acid (AA) and dehydroascorbic acid (DHA), one of products of the disproportionation of monodehydroascorbate (MDHA) by AA oxidase (AAO, EC 1.10.3.3), on the gravitropic curvature of Arabidopsis roots were characterized by biochemical and genetic approaches. Exogenously applied

The BRI1-associated kinase 1, BAK1, has a brassinolide-independent role in plant cell-death control.

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Programmed cell death (PCD) is a common host response to microbial infection [1-3]. In plants, PCD is associated with immunity to biotrophic pathogens, but it can also promote disease upon infection by necrotrophic pathogens [4]. Therefore, plant cell-suicide programs must be strictly controlled.

Brassinosteroid Induces Phosphorylation of the Plasma Membrane H+-ATPase during Hypocotyl Elongation in Arabidopsis thaliana.

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Brassinosteroids (BRs) are steroid phytohormones that regulate plant growth and development, and promote cell elongation at least in part via the acid-growth process. BRs have been suggested to induce cell elongation by the activating plasma membrane (PM) H+-ATPase. However, the mechanism by which

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