Nitric Oxide Mitigates the Deleterious Effects Caused by Infection of Pseudomonas syringae pv. syringae and Modulates the Carbon Assimilation Process in Sweet Cherry under Water Stress

Bacterial canker is an important disease of sweet cherry plants mainly caused by pv. (Pss). Water deficit profoundly impairs the yield of this crop. Nitric oxide (NO) is a molecule that plays an important role in the plant defense mechanisms. To evaluate the protection exerted by NO against Pss infe...

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Published in:Plants (Basel) 2024-05, Vol.13 (10), p.1361
Main Authors: Rubilar-Hernández, Carlos, Álvarez-Maldini, Carolina, Pizarro, Lorena, Figueroa, Franco, Villalobos-González, Luis, Pimentel, Paula, Fiore, Nicola, Pinto, Manuel
Format: Article
Language:English
Subjects:
Abscisic acid
Antioxidants
Assimilation
Bacterial infections
Carbon dioxide
Conductance
Defense mechanisms
Disease
Drought
Enzymes
Infections
Leaves
net CO2 assimilation
Nitric oxide
Pathogens
Plant bacterial diseases
Prunus avium
Pseudomonas
Pseudomonas syringae
Sodium nitroprusside
Stomata
Stomatal conductance
stress mitigation
Water
Water deficit
Water stress
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Summary:Bacterial canker is an important disease of sweet cherry plants mainly caused by pv. (Pss). Water deficit profoundly impairs the yield of this crop. Nitric oxide (NO) is a molecule that plays an important role in the plant defense mechanisms. To evaluate the protection exerted by NO against Pss infection under normal or water-restricted conditions, sodium nitroprusside (SNP), a NO donor, was applied to sweet cherry plants cv. Lapins, before they were exposed to Pss infection under normal or water-restricted conditions throughout two seasons. Well-watered plants treated with exogenous NO presented a lower susceptibility to Pss. A lower susceptibility to Pss was also induced in plants by water stress and this effect was increased when water stress was accompanied by exogenous NO. The lower susceptibility to Pss induced either by exogenous NO or water stress was accompanied by a decrease in the internal bacterial population. In well-watered plants, exogenous NO increased the stomatal conductance and the net CO assimilation. In water-stressed plants, NO induced an increase in the leaf membranes stability and proline content, but not an increase in the CO assimilation or the stomatal conductance.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants13101361