Browsing by Author "Petřivalský, Marek"

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Interorgan, intraorgan and interplant communication mediated by nitric oxide and related species
(John Wiley & Sons, 2024) Kolbert, Zsuzsanna; Barroso, Juan B; Boscari, Alexandre; Corpas, Francisco J; Gupta, Kapuganti Jagadis; Hancock, John T; Lindermayr, Christian; Palma, José Manuel; Petřivalský, Marek; Wendehenne, David; Loake, Gary J
Plant survival to a potential plethora of diverse environmental insults is underpinned by coordinated communication amongst organs to help shape effective responses to these environmental challenges at the whole plant level. This interorgan communication is supported by a complex signal network that regulates growth, development and environmental responses. Nitric oxide (NO) has emerged as a key signalling molecule in plants. However, its potential role in interorgan communication has only recently started to come into view. Direct and indirect evidence has emerged supporting that NO and related species (S-nitrosoglutathione, nitro-linolenic acid) are mobile interorgan signals transmitting responses to stresses such as hypoxia and heat. Beyond their role as mobile signals, NO and related species are involved in mediating xylem development, thus contributing to efficient root-shoot communication. Moreover, NO and related species are regulators in intraorgan systemic defence responses aiming an effective, coordinated defence against pathogens. Beyond its in planta signalling role, NO and related species may act as ex planta signals coordinating external leaf-to-leaf, root-to-leaf but also plant-to-plant communication. Here, we discuss these exciting developments and emphasise how their manipulation may provide novel strategies for crop improvement.
Nitric oxide-releasing nanomaterials: from basic research to potential biotechnological applications in agriculture
(John Wiley & Sons, 2022) Seabra, Amedea B.; Silveira, Neidiquele M.; Ribeiro, Rafael V.; Pieretti, Joana C.; Barroso, Juan B.; Corpas, Francisco J.; Palma, José M.; Hancock, John T.; Petřivalský, Marek; Gupta, Kapuganti Jagadis; Wendehenne, David; Loake, Gary J.; Durner, Jorg; Lindermayr, Christian; Molnár, Árpád; Kolbert, Zsuzsanna; Oliveira, Halley C.
Nitric oxide (NO) is a multifunctional gaseous signal that modulates the growth, development and stress tolerance of higher plants. NO donors have been used to boost plant endogenous NO levels and to activate NO-related responses, but this strategy is often hindered by the relative instability of donors. Alternatively, nanoscience offers a new, promising way to enhance NO delivery to plants, as NO-releasing nanomaterials (e.g., S-nitrosothiol-containing chitosan nanoparticles) have many beneficial physicochemical and biochemical properties compared to non-encapsulated NO donors. Nano NO donors are effective in increasing tissue NO levels and enhancing NO effects both in animal and human systems. The authors believe, and would like to emphasize, that new trends and technologies are essential for advancing plant NO research and nanotechnology may represent a breakthrough in traditional agriculture and environmental science. Herein, we aim to draw the attention of the scientific community to the potential of NO-releasing nanomaterials in both basic and applied plant research as alternatives to conventional NO donors, providing a brief overview of the current knowledge and identifying future research directions. We also express our opinion about the challenges for the application of nano NO donors, such as the environmental footprint and stakeholder’s acceptance of these materials.