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Article

Alleviating Role of Gibberellic Acid in Enhancing Plant Growth and Stimulating Phenolic Compounds in Carrot (Daucus carota L.) under Lead Stress

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Institute of Horticultural Sciences, University of Agriculture, Faisalabad 38040, Pakistan
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Department of Agronomy, University of Agriculture, Faisalabad 38040, Pakistan
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Department of Environmental Science, International Islamic University, Islamabad 44000, Pakistan
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College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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Department of Marine Biology, Faculty of Marine Sciences, King Abdual Aziz University, P.O. Box 80207, Jeddah 21589, Saudi Arabia
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Biology Department, Faculty of Science, Tabuk University, Tabuk 71421, Saudi Arabia
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Department of Environmental Sciences, Government College University, Faisalabad 38000, Pakistan
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Department of Biological Sciences and Technology, China Medical University, Taichung 40402, Taiwan
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Authors to whom correspondence should be addressed.
Academic Editors: Subhan Danish and Teodor Rusu
Sustainability 2021, 13(21), 12329; https://0-doi-org.brum.beds.ac.uk/10.3390/su132112329
Received: 2 September 2021 / Revised: 3 November 2021 / Accepted: 4 November 2021 / Published: 8 November 2021
Toxicity of heavy-metals in soil is a major constraint for the production of carrots (Daucus carota L.). Different plant growth regulators are being used to overcome this problem. It has been found that plant growth regulators induce stress tolerance in plants. In this study, the role of exogenously applied plant growth regulator, gibberellic acid (GA3) was examined in soil grown two carrot cultivars under four different levels of lead (0, 50, 100, and 150 mg/kg) with one level of gibberellic acid (50 ppm). Results showed that Pb stress retarded the plant growth and reduced chlorophyll contents in the leaves of both carrot cultivars. A significant decrease was observed in photosynthetic attributes by Pb addition alone. However, exogenously applied GA3 ameliorated the plant growth and chlorophyll contents in the leaves of both carrot cultivars under Pb stressed conditions. Moreover, GA3 also decreased the uptake of Pb concentration in carrot leaves and roots. In addition, GA3 significantly regulated the phenolic compounds concentration in both carrot cultivars under Pb stress. In this study, cultivar T-29 was found to be more tolerant to Pb stress, however, cultivar Mevarick experienced higher damage regarding plant growth under Pb stress. View Full-Text
Keywords: hormone application; photosynthetic attributes; soluble salts; Pb toxicity; vegetables hormone application; photosynthetic attributes; soluble salts; Pb toxicity; vegetables
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MDPI and ACS Style

Ghani, M.A.; Abbas, M.M.; Ali, B.; Aziz, R.; Qadri, R.W.K.; Noor, A.; Azam, M.; Bahzad, S.; Saleem, M.H.; Abualreesh, M.H.; Alatawi, A.; Ali, S. Alleviating Role of Gibberellic Acid in Enhancing Plant Growth and Stimulating Phenolic Compounds in Carrot (Daucus carota L.) under Lead Stress. Sustainability 2021, 13, 12329. https://0-doi-org.brum.beds.ac.uk/10.3390/su132112329

AMA Style

Ghani MA, Abbas MM, Ali B, Aziz R, Qadri RWK, Noor A, Azam M, Bahzad S, Saleem MH, Abualreesh MH, Alatawi A, Ali S. Alleviating Role of Gibberellic Acid in Enhancing Plant Growth and Stimulating Phenolic Compounds in Carrot (Daucus carota L.) under Lead Stress. Sustainability. 2021; 13(21):12329. https://0-doi-org.brum.beds.ac.uk/10.3390/su132112329

Chicago/Turabian Style

Ghani, Muhammad A., Muhammad M. Abbas, Basharat Ali, Rukhsanda Aziz, Rashad W.K. Qadri, Anam Noor, Muhammad Azam, Saleem Bahzad, Muhammad H. Saleem, Muyassar H. Abualreesh, Aishah Alatawi, and Shafaqat Ali. 2021. "Alleviating Role of Gibberellic Acid in Enhancing Plant Growth and Stimulating Phenolic Compounds in Carrot (Daucus carota L.) under Lead Stress" Sustainability 13, no. 21: 12329. https://0-doi-org.brum.beds.ac.uk/10.3390/su132112329

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