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Abstract
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In the present study, the effects of foliar application of salicylic acid (100 µM), cerium
oxide (50 mg L−1
), and cerium oxide:salicylic acid nanoparticles (CeO2
: SA-nanoparticles, 50 mg L−1
+ 100 µM) on the growth and physiological responses of purslane (Portulaca oleracea L.) were examined
in non-saline and saline conditions (50 and 100 mM NaCl salinity). Foliar applications mitigated
salinity-induced adverse effects, and the highest plant height and N, P, Mg, and Mn content were
recorded in the variant with non-saline × foliar use of CeO2
: SA-nanoparticles. The highest values
of fresh and dry weight were noted in the treatment with no-salinity × foliar use of CeO2
:SAnanoparticles. The highest number of sub-branches was observed in the foliar treatments with
CeO2
-nanoparticles and CeO2
:SA-nanoparticles without salinity stress, while the lowest number was
noted in the 100 mM NaCl treatment. Moreover, the foliar application of CeO2
:SA-nanoparticles and
cerium-oxide nanoparticles improved the total soluble solid content, K, Fe, Zn, Ca, chlorophyll a,
and oil yield in the plants. The salinity of 0 and 50 mM increased the K content, 1000-seed weight,
total soluble solid content, and chlorophyll b content. The use of 100 mM NaCl with no-foliar spray
increased the malondialdehyde, Na, and H2O2 content and the Na+/K+
ratio. No-salinity and 50 mM
NaCl × CeO2
: SA-nanoparticle interactions improved the anthocyanin content in plants. The
phenolic content was influenced by NaCl100 and the foliar use of CeO2
:SA-nanoparticles. The study
revealed that the foliar treatment with CeO2
:SA-nanoparticles alleviated the side effects of salinity by
improving the physiological responses and growth-related traits of purslane plants.
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