02829naa a2200349 a 450000100080000000500110000800800410001902400510006010000200011124501540013126000090028552017510029465000160204565000100206165000240207165000130209565300220210865300260213065300150215665300280217165300200219965300240221970000200224370000230226370000200228670000210230670000180232770000200234570000190236570000220238477300730240621773432025-07-16       2025    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1134/S10214437246095222DOI1 aSILVA, L. D. da  aCan the application of exogenous nitric oxide (S-nitrosoglutathione—GSNO) confer tolerance to water deficit in maize plants?h[electronic resource]  c2025  aNitric oxide is a key signaling molecule that instigates several changes in plant metabolism by inducing tolerance to environmental stress. In this context, the objective of this study was to evaluate the application of exogenous nitric oxide (S-nitrosoglutathione—GSNO), on the biochemical and physiological characteristics of maize plants exposed to water deficit. The experiment was carried out in a greenhouse using a completely randomized design, with six treatments and five replications. Analyses were performed on plants at phenological stage V6 (six fully expanded leaves) of the sensitive hybrid BRS 1030 under irrigation, with water deficit and water deficit with the application of two S-nitrosoglutathione concentrations (50 and 100 μM). For comparative purposes, the tolerant maize hybrid DKB 390 was also subjected to these conditions, without the application of S-nitrosoglutathione. Biometrics, spad, gas exchange, sugars, glutathione and antioxidant enzymes were evaluated. Water deficit causes stomatal and biochemical limitations in maize plants. However, the application of 50 μM S-nitrosoglutathione restores the gas exchange of BRS 1030, probably inhibiting photosynthetic limitations. The same concentration increases the sugar levels in these plants (roots and shoots), contributing to the osmotic adjustment of maize under stress. It was also observed that the production of oxidized glutathione may have consumed the hydrogen peroxide resulting from stress, which may have decreased the activity of peroxidases, maintaining redox balance. A concentration of 50 μM S-nitrosoglutathione improves the physiology and biochemistry of maize plants, inducing tolerance of the sensitive hybrid (BRS 1030) to water deficit.  aGlutathione  aMilho  aResistência a Seca  aZea Mays  aDéficit hídrico  aEquilíbrio osmótico  aGlutationa  aLimitação estomática  aOsmotic balance  aStomatal limitation1 aPENHA, N. C. da1 aSILVA, A. C. C. da1 aSILVEIRA, N. M.1 aMAGALHAES, P. C.1 aSANTOS, B. R.1 aSOUZA, T. C. de1 aMARQUES, D. M.1 aSANTOS, P. R. dos  tRussian Journal of Plant Physiologygv. 72, n. 4, article 106, 2025.