Salicylic acid-induced photosynthetic adaptability of Zea mays L. to polyethylene glycol-simulated water deficit is associated with nitric oxide signaling
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Salicylic acid (SA) and nitric oxide (NO) form a new group of plant growth substances that cooperatively interact to promote plant growth and productivity. Water deficit (WD) stress is a major limiting factor for photosynthesis, which in turn limits crop yield. However, the mechanism of SA and NO in stimulating photosynthesis has not yet been elucidated. Therefore, in this study, we investigated the SA- and NO-mediated photosynthetic adaptability of maize seedlings to WD in terms of photosynthetic parameters, activities and mRNA levels of CO2 assimilation enzymes. Our results showed that SA alleviated the WD-induced reduction of photosynthetic performance. The activities of Rubisco and Rubisco activase enzymes increased significantly due to SA pretreatment. Moreover, higher transcription rates of Rbc L, ZmRCAα and ZmRCAβ mRNA further confirmed the effects of SA on CO2 assimilation. WD or SA-induced decreases or increases of CO2 assimilation ability were further decreased after c-PTIO addition.
Additional key wordschlorophyll fluorescence transients gene expression nitric oxide scavenger photosynthetic characteristics
cyclic guanosine monophosphate
intercellular CO2 concentration
maximum photochemical efficiency of PSII
photosynthesis performance in PSII electron transport
photosynthetic assimilation rate
per active reaction centers
relative water content
intrinsic water-use efficiency
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- Bajguz A.: Nitric oxide: role in plants under abiotic stress.–In: Parvaiz A., Mohd R.W. (ed.): Biomedical and Life Sciences: Physiological Mechanisms and Adaptation Strategies in Plants under Changing Environment. Pp. 137–159. Springer, New York 2013.Google Scholar
- FAOSTAT: Food and agricultural commodities production. https://doi.org/faostat.fao.org/site/339/default.aspx, 2010.
- Hancock J.T.: NO synthase? Generation of nitric oxide in plants.–Period. Biol. 114: 19–24, 2012.Google Scholar
- Kausar F., Shahbaz M.: Interactive effect of foliar application of nitric oxide (NO) and salinity on wheat (Triticum aestivum L.).–Pak. J. Bot. 45: 67–73, 2013.Google Scholar
- Shao R.X., Chen J.H., Miao F. et al.: Photosynthetic performance of Triticum aestivum L. in response to water and nitrogen deficit.–J. Food Agric. Environ. 11: 1252–1256, 2013.Google Scholar
- Siddiqui M.H., Al-Whaibi M.H., Ali H.M. et al.: Mitigation of nickel stress by the exogenous application of salicylic acid and nitric oxide in wheat.–Aust. J. Crop Sci. 7: 1780–1788, 2013.Google Scholar
- Strasser R.J., Srivastava A., Tsimilli-Michael M.: The fluorescence transient as a tool to characterize and screen photosynthetic samples.–In: Yunus M., Pathre U., Mohanty P. (ed.): Probing Photosynthesis: Mechanisms, Regulation and Adaptation. Pp. 445–483. Taylor and Francis, London 2000.Google Scholar