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| 005 | 20250318094723.0 | ||
| 008 | 250318b |||||||| |||| 00| 0 eng d | ||
| 022 | _a0176-1617 | ||
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_aMSU _bEnglish _cMSU _erda |
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| 050 | 0 | 0 | _aQK711.2 JOU |
| 100 | 1 |
_aAngulo, Carlos _eauthor |
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| 245 | 1 | 0 |
_aRole of dioxygenase α-DOX2 and SA in basal response and in hexanoic acid-induced resistance of tomato (Solanum lycopersicum) plants against Botrytis cinerea _ccreated by Carlos Angulo, María de la O Leyva, Ivan Finiti, Jaime López-Cruz, Emma Fernández-Crespo, Pilar García-Agustín and Carmen González-Bosch |
| 264 | 1 |
_aAmsterdam: _bElsevier GmbH, _c2015. |
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| 336 |
_2rdacontent _atext _btxt |
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| 337 |
_2rdamedia _aunmediated _bn |
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| 338 |
_2rdacarrier _avolume _bnc |
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| 440 |
_aJournal of Plant Physiology _vVolume 175 |
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| 520 | 3 | _aResistance of tomato (Solanum Lycopersicum) to the fungal pathogen Botrytis cinerea requires complex interplay between hormonal signalling. In this study, we explored the involvement of new oxylipins in the tomato basal and induced response to this necrotroph through the functional analysis of the tomato α-dioxygenase2 (α-DOX2)-deficient mutant divaricata. We also investigated the role of SA in the defence response against this necrotrophic fungus using SA-deficient tomato nahG plants. The plants lacking dioxigenase α-DOX2, which catalyses oxylipins production from fatty acids, were more susceptible to Botrytis, and hexanoic acid-induced resistance (Hx-IR) was impaired; hence α-DOX2 is required for both tomato defence and the enhanced protection conferred by natural inducer hexanoic acid (Hx) against B. cinerea. The divaricata plants accumulated less pathogen-induced callose and presented lower levels of jasmonic acid (JA) and 12-oxo-phytodienoic acid (OPDA) upon infection if compared to the wild type. Glutathion-S-transferase (GST) gene expression decreased and ROS production significantly increased in Botrytis-infected divaricata plants. These results indicate that absence of α-DOX2 influences the hormonal changes, oxidative burst and callose deposition that occur upon Botrytis infection in tomato. The study of SA-deficient nahG tomato plants showed that the plants with low SA levels displayed increased resistance to Botrytis, but were unable to display Hx-IR. This supports the involvement of SA in Hx-IR. NaghG plants displayed reduced callose and ROS accumulation upon infection and an increased GST expression. This reflects a positive relationship between SA and these defensive mechanisms in tomato. Finally, Hx boosted the pathogen-induced callose in nahG plants, suggesting that this priming mechanism is SA-independent. Our results support the involvement of the oxylipins pathway and SA in tomato response to Botrytis, probably through complex crosstalk of the hormonal balance with callose and ROS accumulation, and reinforce the role of the oxidative stress in the outcome of the plant-Botrytis interaction. | |
| 650 | _aBotrytis cinerea | ||
| 650 | _aDioxygenase | ||
| 650 | _aHexanoic acid | ||
| 700 | 1 |
_aO Leyva, María de la _eco-author |
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| 700 | 1 |
_aFiniti, Ivan _eco-author |
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| 700 | 1 |
_aLópez-Cruz, Jaime _eco-author |
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| 700 | 1 |
_aFernández-Crespo, Emma _eco-author |
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| 700 | 1 |
_aGarcía-Agustín, Pilar _eco-author |
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| 700 | 1 |
_aGonzález-Bosch, Carmen _eco-author |
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| 856 | _uhttps://doi.org/10.1016/j.jplph.2014.11.004 | ||
| 942 |
_2lcc _cJA |
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_c169340 _d169340 |
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