Salicylic Acid Improves Antioxidant Defense System and Photosynthetic Performance in Aristotelia chilensis Plants Subjected to Moderate Drought Stress

dc.creatorGonzalez Villagra, Jorge
dc.creatorReyes Diaz, Marjorie M.
dc.creatorTighe Neira, Ricardo
dc.creatorInostroza Blancheteau, Claudio
dc.creatorEscobar, Ana Luengo
dc.creatorBravo, Leon A.
dc.date2022
dc.date2022-04-04T16:33:27Z
dc.date2022-04-04T16:33:27Z
dc.date.accessioned2022-10-18T14:53:09Z
dc.date.available2022-10-18T14:53:09Z
dc.identifierPLANTS-BASEL,Vol.11,,2022
dc.identifierhttps://repositoriodigital.uct.cl/handle/10925/4533
dc.identifier10.3390/plants11050639
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4444347
dc.descriptionSalicylic acid (SA) has been shown to ameliorate drought stress. However, physiological and biochemical mechanisms involved in drought stress tolerance induced by SA in plants have not been well understood. Thus, this study aimed to study the role of SA application on enzymatic and non-enzymatic antioxidants, photosynthetic performance, and plant growth in A. chilensis plants subjected to moderate drought stress. One-year-old A. chilensis plants were subjected to 100% and 60% of field capacity. When plants reached moderate drought stress (average of stem water potential of -1.0 MPa, considered as moderate drought stress), a single SA application was performed on plants. Then, physiological and biochemical features were determined at different times during 14 days. Our study showed that SA application increased 13.5% plant growth and recovered 41.9% A(N) and 40.7% g(s) in drought-stressed plants on day 3 compared to drought-stressed plants without SA application. Interestingly, SOD and APX activities were increased 85% and 60%, respectively, in drought-stressed SA-treated plants on day 3. Likewise, SA improved 30% total phenolic content and 60% antioxidant capacity in drought-stressed A. chilensis plants. Our study provides insight into the SA mechanism to tolerate moderate drought stress in A. chilensis plants.
dc.languageen
dc.publisherMDPI
dc.sourcePLANTS-BASEL
dc.subjectsuperoxide dismutase activity
dc.subjectascorbate peroxidase activity
dc.subjectCO2 assimilation
dc.subjecttotal phenolics
dc.subjectplant growth
dc.titleSalicylic Acid Improves Antioxidant Defense System and Photosynthetic Performance in Aristotelia chilensis Plants Subjected to Moderate Drought Stress
dc.typeArticle


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