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The synthesis of nitric oxide as signalling and defence mechanisms in plant
stress.
Key words: nitric oxide – nitric oxide synthase – plant stress – reactive nitrogen species –
reactive oxygen species
Summary
Nitric oxide (NO) is involved in many important cellular processes including neuronal transmission, blood
pressure homeostasis, and immune response. Recent studies have also discovered the role for NO as a
signaling molecule in plants. As a developmental regulator, NO promotes germination, leaf extension and
root growth, and delays leaf senescence and fruit maturation. NO is also involved in signalling and defence
pathways of plant response to various types of abiotic and biotic stress. NO synergistically acts with
reactive oxygen species as a key signal in plant resistance to incompatible pathogens by triggering
resistance-associated hypersensitive cell death. NO also activates the expression of several defense genes
and probably play a role in pathways leading to systemic acquired resistance.
Poděkování
Tato práce byla podpořena výzkumným záměrem MŠMT ČR MSM 6198959215.
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