Publications by authors named "Antony J Buchala"
Benzothiadiazole (BTH) enhanced the accumulation of soluble and cell-wall-bound phenolics in strawberry leaves and also improved the resistance to powdery mildew infection under greenhouse conditions. The most pronounced change was seen in the levels of ellagitannins, which increased up to 2- to 6-fold 4 days after the BTH application, but persisted only in the inoculated plants. The induction of phenolic metabolism by BTH was also reflected in the fruits, several compounds being increased in inoculated, BTH-treated plants.
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- The study explores how weight loss and recovery can lead to increased fat storage, known as catch-up fat, due to decreased thermogenesis influenced by signals from fat tissue.
- Researchers found that in a rat model of semistarvation followed by refeeding, levels of the gene SCD1 in skeletal muscle rise, linking this gene's activity to the process of fat recovery.
- Elevated SCD1 levels help convert fatty acids, reducing their oxidation in mitochondria, which ultimately slows down the body’s energy expenditure and plays a role in regulating fat stores.
Signal signature and transcriptome changes of Arabidopsis during pathogen and insect attack.
Mol Plant Microbe Interact
September 2005
Plant defenses against pathogens and insects are regulated differentially by cross-communicating signaling pathways in which salicylic acid (SA), jasmonic acid (JA), and ethylene (ET) play key roles. To understand how plants integrate pathogen- and insect-induced signals into specific defense responses, we monitored the dynamics of SA, JA, and ET signaling in Arabidopsis after attack by a set of microbial pathogens and herbivorous insects with different modes of attack. Arabidopsis plants were exposed to a pathogenic leaf bacterium (Pseudomonas syringae pv.
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- Plant defenses against pathogens and insects are controlled by signaling pathways involving salicylic acid (SA) and jasmonic acid (JA), which have opposing effects on each other.
- In Arabidopsis plants lacking SA accumulation, there is a significant increase in JA levels and expression of JA-related genes during pathogen infection, suggesting that SA generally limits JA signaling in healthy plants.
- The study shows that NPR1, a regulatory protein important for SA signaling, plays a crucial role in mediating the antagonistic effects of SA on JA signaling, functioning in the cytosol rather than needing to be in the nucleus.
The interaction of phytochrome signalling with the SA signal transduction pathway has been investigated in Arabidopsis using single and multiple mutants affected in light perception (phyA and phyB deficient) and light-signal processing (psi2, phytochrome signalling). The induction of PR1 by SA and functional analogues has been found to strictly correlate with the activity of the signalling pathway controlled by both phyA and phyB photoreceptors. In darkness as well as dim light, and independently of a carbohydrate source, SA-induced PR gene expression as well as the hypersensitive response to pathogens (HR) are strongly reduced.
View Article and Find Full Text PDFWhen seedlings of barley (Hordeum vulgare L.) were transferred from a natural light/dark cycle into darkness, (1-->3,1-->4)-beta- D-glucan endohydrolase (EC 3.2.
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