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The Effect of Priming Duration with Salicylic Acid under Salinity Stress on Growth and Leaf Anatomy of Sweet Corn (Zea mays L.)

Krisnanda Surya Dharma(1), Maryani Maryani(2*)

(1) Faculty of Biology, Universitas Gadjah Mada Jl. Teknika Selatan,Sekip Utara, Yogyakarta 55283
(2) Faculty of Biology, Universitas Gadjah Mada, Yogyakarta Jl. Teknika Selatan,Sekip Utara, Yogyakarta 55283
(*) Corresponding Author


Salinity stress is known for adverse effect on plants. Priming with salicylic acid was able to improve plant performance under salinity stress. This study aimed to determine the effect of priming duration with salicylic acid on growth, leaf anatomy and the optimal priming duration for sweet corn seedlings (Zea mays L.) under salinity stress. The experiment was based on Completely Randomized Design with two factors and five replications. The first factor was priming duration with salicylic acid (2 mM) with four different durations (0, 12, 18 and 24 h). The second factor was the level of salinity (NaCl 0% and 3%). Parameters observed were germination percentage, plant height, root length, fresh weight, dry weight, chlorophyll content, leaf proline content, leaf anatomy and stomatal density. Data were analyzed with t-test, ANOVA and followed by Duncan’s test at 95% confidence level. The results showed that 18-h priming duration observed as the highest germination percentage which was 7% higher than control.  Priming for 24 h showed phytotoxic effect for sweet corn on the germination phase by reducing the percentage of germination. The application of salicylic acid mitigated the toxic effects of NaCl stress on maize seedlings and considerably improved root and shoot growth, photosynthetic pigments, fresh weight, dry weight, proline content, and stomatal density, as well as could maintaining the leaf anatomy. The optimal priming duration with salicylic acid for sweet corn seedlings under 3 % salinity was 18 h.


Sweet corn; Salicylic acid; Salinity; Priming duration

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