abscisic acid/karies

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Abscisic Acid Acts as a Blocker of the Bitter Taste G Protein-Coupled Receptor T2R4.

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Bitter taste receptors (T2Rs) belong to the G protein-coupled receptor superfamily. In humans, 25 T2Rs mediate bitter taste sensation. In addition to the oral cavity, T2Rs are expressed in many extraoral tissues, including the central nervous system, respiratory system, and reproductive system. To

The apoplastic pH of the substomatal cavity of Vicia faba leaves and its regulation responding to different stress factors.

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The apoplastic pH of the substomatal cavity is an essential determinant of stomatal movement. In detached leaves of Vicia faba substomatal apoplastic pH and its dependence on external (stress) factors was investigated using a non-invasive approach: pH-microsensors were inserted into open stomata,

Dynamics of ionic activities in the apoplast of the sub-stomatal cavity of intact Vicia faba leaves during stomatal closure evoked by ABA and darkness.

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Stomatal movement is accomplished by changes in the ionic content within guard cells as well as in the cell wall of the surrounding stomatal pore. In this study, the sub-stomatal apoplastic activities of K+, Cl-, Ca2+ and H+ were continuously monitored by inserting ion-selective micro-electrodes

Structural mechanism of abscisic acid binding and signaling by dimeric PYR1.

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The phytohormone abscisic acid (ABA) acts in seed dormancy, plant development, drought tolerance, and adaptive responses to environmental stresses. Structural mechanisms mediating ABA receptor recognition and signaling remain unknown but are essential for understanding and manipulating abiotic

The abscisic acid receptor PYR1 in complex with abscisic acid.

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The plant hormone abscisic acid (ABA) has a central role in coordinating the adaptive response in situations of decreased water availability as well as the regulation of plant growth and development. Recently, a 14-member family of intracellular ABA receptors, named PYR/PYL/RCAR, has been

Identification of novel phosphatidic acid binding domain on sphingosine kinase 1 of Arabidopsis thaliana.

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Phosphatidic acid (PA) is an important lipid signaling molecule which interacts with Arabidopsis thaliana Sphingosine kinase1 (AtSPHK1) during several abiotic stresses particularly drought stress as a result of Abscisic acid (ABA) signaling in guard cells. PA molecules respond by generating lipid

A gene encoding a protein with a proline-rich domain (MtPPRD1), revealed by suppressive subtractive hybridization (SSH), is specifically expressed in the Medicago truncatula embryo axis during germination.

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A gene MtPPRD1, encoding a protein of 132 amino acids containing a proline-rich domain (PRD), has been revealed by suppressive subtractive hybridization (SSH) with two mRNA populations of embryo axes harvested immediately before and after radicle emergence. Although at the protein level MtPPRD1

Root-to-shoot signalling: apoplastic alkalinization, a general stress response and defence factor in barley (Hordeum vulgare).

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We used a noninvasive microprobe technique to record in substomatal cavities of barley leaves the apoplastic pH response to different stress situations. When K+ (or Na+) activity at the roots of intact plants was increased from 1 to 50 mM, the leaf apoplastic pH increased by 0.4 to 0.6 units within

Initiation of embryogenic callus and suspension cultures of eastern white pine (Pinus strobus L.).

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Embryogenic callus and suspension cultures of eastern white pine (Pinus strobus) have been obtained. The whole female gametophyte was plated on a medium containing 50 mg/l glutamine, 500 mg/l casein hydrolysate, 3% sucrose, 2 mg/1 2,4-D, 1 mg/1 BA and 0.2% Gelrite as a solidifying agent. Embryogenic

The strawberry pathogenesis-related 10 (PR-10) Fra a proteins control flavonoid biosynthesis by binding to metabolic intermediates.

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Pathogenesis-related 10 (PR-10) proteins are involved in many aspects of plant biology but their molecular function is still unclear. They are related by sequence and structural homology to mammalian lipid transport and plant abscisic acid receptor proteins and are predicted to have cavities for

Stomatal deregulation in Plasmopara viticola-infected grapevine leaves.

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In grapevine, the penetration and sporulation of Plasmopara viticola occur via stomata, suggesting functional relationships between guard cells and the pathogen. This assumption was supported by our first observation that grapevine (Vitis vinifera cv. Marselan) cuttings infected by P. viticola

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