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Article

Seed Treatment with α-Tocopherol Regulates Growth and Key Physio-Biochemical Attributes in Carrot (Daucus carota L.) Plants under Water Limited Regimes

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Department of Botany, Government College University, Allama Iqbal Road, Faisalabad 38000, Pakistan
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MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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Department of Botany, University of Agriculture, Faisalabad 38040, Pakistan
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Instituto de Farmacia, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 5110566, Chile
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Department of Environmental Sciences and Engineering, Government College University Allama Iqbal Road, Faisalabad 38000, Pakistan
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Department of Biological Sciences and Technology, China Medical University, Taichung 40402, Taiwan
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Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
*
Authors to whom correspondence should be addressed.
Academic Editor: Najeeb Ullah
Agronomy 2021, 11(3), 469; https://doi.org/10.3390/agronomy11030469
Received: 28 December 2020 / Revised: 8 February 2021 / Accepted: 10 February 2021 / Published: 4 March 2021
The influence of seed priming with varying levels (50 and 100 mg L−1) of alpha-tocopherol (Toc) was investigated in carrot plants under water-deficit conditions. For this purpose, two cultivars of carrot, DC4 and DC90, were selected and subjected to well-watered (100% field capacity (FC)) and water-deficit stress (50% FC). After 21 days of water-deficit conditions, a significant suppression was observed in shoot and root fresh and dry weights, their lengths, chlorophyll a, b and total contents, and total soluble proteins (TSP). However, an up-regulatory effect of water stress was observed on the concentrations of glycinebetaine (GB), hydrogen peroxide (H2O2), malondialdehyde (MDA), ascorbic acid (AsA), total phenolics as well as the activities of catalase (CAT) and peroxidase (POD) enzymes. Exogenous application of alpha-tocopherol was effective in reducing the accumulation of H2O2 and MDA contents and improving all growth attributes, contents of chlorophyll, proline, GB, AsA, total phenolics, TSP, and the activities of CAT and POD enzymes. Of both carrot cultivars, cv. DC4 had better performance in terms of growth attributes, whereas the response of the two cultivars was similar in all other attributes varying water regimes. Overall, it is suggested that seed priming with 100 mg L−1 Toc was effective in improving plant growth attributes, osmoprotectants and the oxidative defense system of carrot plants under water-deficit conditions. View Full-Text
Keywords: Daucus carota; α-tocopherol; drought stress; reactive oxygen species; antioxidants Daucus carota; α-tocopherol; drought stress; reactive oxygen species; antioxidants
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MDPI and ACS Style

Hameed, A.; Akram, N.A.; Saleem, M.H.; Ashraf, M.; Ahmed, S.; Ali, S.; Abdullah Alsahli, A.; Alyemeni, M.N. Seed Treatment with α-Tocopherol Regulates Growth and Key Physio-Biochemical Attributes in Carrot (Daucus carota L.) Plants under Water Limited Regimes. Agronomy 2021, 11, 469. https://doi.org/10.3390/agronomy11030469

AMA Style

Hameed A, Akram NA, Saleem MH, Ashraf M, Ahmed S, Ali S, Abdullah Alsahli A, Alyemeni MN. Seed Treatment with α-Tocopherol Regulates Growth and Key Physio-Biochemical Attributes in Carrot (Daucus carota L.) Plants under Water Limited Regimes. Agronomy. 2021; 11(3):469. https://doi.org/10.3390/agronomy11030469

Chicago/Turabian Style

Hameed, Abdul, Nudrat A. Akram, Muhammad H. Saleem, Muhammad Ashraf, Shakeel Ahmed, Shafaqat Ali, Abdulaziz Abdullah Alsahli, and Mohammed N. Alyemeni. 2021. "Seed Treatment with α-Tocopherol Regulates Growth and Key Physio-Biochemical Attributes in Carrot (Daucus carota L.) Plants under Water Limited Regimes" Agronomy 11, no. 3: 469. https://doi.org/10.3390/agronomy11030469

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