Effect of Salicylic acid and Jasmonic acid on growth traits and root and shoot ionic interaction of Lavender (Lavendula officinalis L.) in salt stress conditions

Document Type : original paper

Authors

1 Department of Agronomy, Yadegar-e-Imam Khomeini (RAH) Shahre- Rey Branch, Islamic Azad University, Tehran, Iran.

2 Accademic member/Islamic Azad university, Yadegar-e-Imam Khomeini (RAH) Shahre-Rey Branch

Abstract

Background and objectives: Lavender (Lavendula officinalis L.) is the most important medicinal plant, belongs to lamiaceae family in which had a role in ancient medicine. Growth and yield of plants are being limited by the abiotic environmental stresses including salinity in many places throughout the world, which have caused a widespread harm to the plants, also it is considered as an important functional limitations for yield around the world. This study was done to evaluate effect of salicylic acid and jasmonic acid on some growing traits and sodium and potassium content of the root and shoot in Lavender in salinity stress conditions. Also evaluating the foliar application of salicylic acid and jasmonic effect to reduce the harmful effects of salinity stress and reach to the effective introduction of new inputs was examined.

Materials and methods: This experiment was done at Azad Islamic University, Yadegar-e-Imam Khomeini (RAH) Shahre-Rey branch and greenhouse located in the Region 4 in Jun 2015. The experiment was done as factorial based on completely randomized blocks deisign with four replications. The experimental factors were included salt stress (NaCl) in four levels (0, 25, 50, 75 mM), Salicylic acid in two levels (0 and 0.7 mM), and Jasmunic acid in two levels (0 and 100 µM).
Results: The average comparison simple effects of salinity showed that this factor significantly reduced the morphological traits of root and shoot dry weight, root and shoot length, branches number, Leaves surface, also maide decreased in root and shoot potassium, and increased the root and shoot sodium. The results indicated that only triple interaction effect of experimental factors were meaningful on dry weight of root, At this situation the optimum root dry weight equivalent 2.21 gr, was gained in the factors of salinity stress and Salicylic acid and Jasmonic acid foliar application. According to findings, the highest root potassium contents with 1.20 and 1.96 element weight percent per dry matter conducted in non-salt stress treatment and 0.7 mM Salycilic acid or 100 µm Jasmonic acid application conditions alternatively.
Conclusion: Based on the results, it seems that potasium adsobtion in root and shoot has a role in enhancing salt resistance as an effective mechanism. However in most of experimental traits, the role of Salycilic acid in enhancing growth traits potasium content of root and shoot and at the other side sodium decrease in root and shoot of Lavender was more effective than Jasmonic acid.

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References

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Journal of Plant Production Research
Volume 23, Issue 3
November 2016
Pages 159-166

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