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Anatomical changes and Catalase gene expression response of tomato (Solanum lycopersicum L.) to water deficit irrigation
Hanieh Mohajjel shoja1 , Taha Khezriani2 , Maryam Kolahi 3, Mina Kazemian1 , Elham Mohajel kazemi1 , Milad Yazdi4
1- Department of Plant Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran.
2- Khezriani1
3- Biology Department, Science Faculty, Shahid Chamran University of Ahvaz, Iran , faramooshi_mk@yahoo.com
4- Biology Department, Science Faculty, Shahid Chamran University of Ahvaz, Iran
Abstract:   (60 Views)
Drought alters plant metabolic processes resulting in some changes at the anatomical and morphological levels. Experiments were conducted to determine the morphologic and anatomic response of two cultivars of tomato (Solanum lycopersicum L.- CaljN3 and Superstrain B) under different irrigation regimes (100%, 75%, 50%, and 25% of field capacity). Catalase 1 (CAT1) gene expression was investigated by real-time RT-qPCR and protein interaction studies in tomatoes were utilized. Drought stress caused an increase in number of vessels in roots and stems of both cultivars. The diameter of vascular cylinders in roots of control plants (both cultivars) was more extended. Expression of the CAT1 gene did not show any significant difference in the CaljN3 cultivar under drought conditions. Whereas, expression of the CAT1 gene indicated a significant increase in Superstrain B cultivar at the 50% and 25% FC levels of treated conditions. The gene network showed that this protein interacts with superoxide dismutase, acyl-CoA oxidase, and glutathione peroxidase. CaljN3 cultivars showed more tolerance than Superstrain B at all levels of drought treatment. Therefore, Superstrain B is considered a susceptible cultivar under drought conditions. It suggested that the defense against oxidative stress may initiate one step before the activity of antioxidant enzymes. Thus, the tomato plant tries to fight the stress factor by activating proteins, especially channels, pumps, and some cellular messengers.
Keywords: Abiotic stress, Anatomic, Tomato, protein interaction
Full-Text [PDF 681 kb]   (66 Downloads)    
Article Type: Original Research | Subject: Greenhouse Horticulture
Received: 2023/03/18 | Accepted: 2023/06/25 | Published: 2024/03/31
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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.