Harpin modulates the accumulation of salicylic acid by Arabidopsis cells via apoplastic alkalization

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Harpin modulates the accumulation of salicylic acid by Arabidopsis cells via apoplastic alkalization.

It is reported here that salicylic acid (SA) is rapidly taken up by Arabidopsis cells, and its uptake is accompanied by media alkalization and cytosolic acidification, and it is inhibited by the ionophore nigericin, suggesting that its import is linked with that of H+ and driven by a proton gradient. Such import and accumulation declined sharply within a narrow physiological pH range (pH 5.7-6....

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Amino acid homeostasis modulates salicylic acid-associated redox status and defense responses in Arabidopsis.

The tight association between nitrogen status and pathogenesis has been broadly documented in plant-pathogen interactions. However, the interface between primary metabolism and disease responses remains largely unclear. Here, we show that knockout of a single amino acid transporter, LYSINE HISTIDINE TRANSPORTER1 (LHT1), is sufficient for Arabidopsis thaliana plants to confer a broad spectrum of...

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Plastidial fatty acid signaling modulates salicylic acid- and jasmonic acid-mediated defense pathways in the Arabidopsis ssi2 mutant.

A mutation in the Arabidopsis gene ssi2/fab2, which encodes stearoyl-acyl carrier protein desaturase (S-ACP-DES), results in the reduction of oleic acid (18:1) levels in the mutant plants and also leads to the constitutive activation of NPR1-dependent and -independent defense responses. By contrast, ssi2 plants are compromised in the induction of the jasmonic acid (JA)-responsive gene PDF1.2 an...

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Heavy Metals Effects on Brassica Oleracea and Elements Accumulation by Salicylic Acid

Background & Aims of the Study: The objective of this study was to investigate the seed pre-treatment with salicylic acid (SA) on tolerance and remediation ability of Brassica oleracea var. acephala under lead and zinc stresses. Materials and Methods: Present study was conducted to evaluate phyto-accumulative ability of Brassica oleracea var. acephala in heavy metal concentrat...

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Differential Accumulation of Salicylic Acid and Salicylic Acid-Sensitive Catalase in Different Rice Tissues.

We previously proposed that salicylic acid (SA)-sensitive catalases serve as biological targets of SA in plant defense responses. To further examine the role of SA-sensitive catalases, we have analyzed the relationship between SA levels and SA sensitivity of catalases in different rice (Oryza sativa) tissues. We show here that, whereas rice shoots contain extremely high levels of free SA, as pr...

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ژورنال

عنوان ژورنال: Journal of Experimental Botany

سال: 2005

ISSN: 1460-2431,0022-0957

DOI: 10.1093/jxb/eri310