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Strigolactone (GR24) Application Positively Regulates Photosynthetic Attributes, Stress-Related Metabolites and Antioxidant Enzymatic Activities of Ornamental Sunflower ( Helianthus annuus cv. Vincent’s Choice) under Salinity Stress

Author

Listed:
  • Muhammad Ahsan

    (Department of Horticultural Sciences, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan)

  • Hira Zulfiqar

    (Department of Botany, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan)

  • Muhammad Ansar Farooq

    (School of Civil and Environmental Engineering, Institute of Environmental Sciences and Engineering, National University of Science and Technology, Islamabad 44000, Pakistan)

  • Sajjad Ali

    (Department of Entomology, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan)

  • Aasma Tufail

    (Department of Botany, Division of Science and Technology, University of Education, Lahore 54000, Pakistan)

  • Shamsa Kanwal

    (Agricultural Biotechnology Research Institute, AARI, Faisalabad 38850, Pakistan)

  • Muhammad Rashid Shaheen

    (Department of Horticultural Sciences, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan)

  • Mateen Sajid

    (Department of Horticulture, Ghazi University, Dera Ghazi Khan 32200, Pakistan)

  • Hera Gul

    (Department of Horticultural Sciences, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan)

  • Aftab Jamal

    (Department of Soil and Environmental Sciences, Faculty of Crop Production Sciences, The University of Agriculture, Peshawar 25130, Pakistan)

  • Muhammad Farhan Saeed

    (Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehari 61100, Pakistan)

  • Roberto Mancinelli

    (Department of Agricultural and Forestry Sciences (DAFNE), University of Tuscia, 01100 Viterbo, Italy)

  • Emanuele Radicetti

    (Department of Chemical, Pharmaceutical and Agricultural Sciences (DOCPAS), University of Ferrara, 44121 Ferrara, Italy)

Abstract

Strigolactones, a new group of phytohormones, are reported to improve plant tolerance to multiple abiotic stresses. A pot experiment was conducted to investigate the impact of synthetic strigolactone (GR24 at 0.001, 0.01 and 0.1 mg L −1 ) application on ornamental sunflowers ( Helianthus annuus cv. Vincent’s Choice) grown under salt stress (150 mM NaCl). Salt stress was applied after 14 days, and SL was applied 25 days seed sowing. The results showed that amongst various GR24 concentrations, 0.01 mg L −1 proved to be superior, as it enhanced the photosynthetic rate (9.29%), transpiration rate (0.76%), stomatal conductance (77.5%), total soluble protein (0.55%) and K + (14.63% in roots; 14.87% in shoots) and Ca 2+ (12.63% in roots; 11.48% in shoots) contents under control conditions. Similarly, the leaf turgor potential (Ψ p ), osmotic potential (Ψ s ) and free proline, glycinebetaine (GB), superoxide dismutase (SOD), catalase (CAT) and peroxide (POD) contents increased by 58.17, 89.95, 159.04, 101.54, 74.42, 175.68 and 53.62%, respectively, under salt stress conditions. The leaf water potential (Ψ w ) decreased (−0.14%) and the malondialdehyde (MDA) content increased (16.65%) when treated with the 0.001 mg L −1 GR24 level. Meanwhile, hydrogen peroxide (H 2 O 2 ) and Na + concentrations in roots and shoots increased by 62.53%, 74.66% and 38.55% under saline conditions with a GR24 level of 0 mg L −1 . Regarding the plant biomass, a GR24 level of 0.01 mg L −1 with salt stress greatly decreased the root (−47.27% and −50.45%) and shoot (−44.79% and −59.42%) fresh and dry weights, respectively, compared to control conditions. These results reveal that exogenously applied GR24 might be an effective way to mitigate the perilous impacts of salt stress in ornamental sunflower production. It is suggested that the use of molecular techniques to study different processes in which GR24 could play a vital part in various commercial floricultural crops is extremely imperative and can open novel horizons for future investigations in this exhilarating field of plant hormones.

Suggested Citation

  • Muhammad Ahsan & Hira Zulfiqar & Muhammad Ansar Farooq & Sajjad Ali & Aasma Tufail & Shamsa Kanwal & Muhammad Rashid Shaheen & Mateen Sajid & Hera Gul & Aftab Jamal & Muhammad Farhan Saeed & Roberto M, 2022. "Strigolactone (GR24) Application Positively Regulates Photosynthetic Attributes, Stress-Related Metabolites and Antioxidant Enzymatic Activities of Ornamental Sunflower ( Helianthus annuus cv. Vincent," Agriculture, MDPI, vol. 13(1), pages 1-17, December.
    • Handle: RePEc:gam:jagris:v:13:y:2022:i:1:p:50-:d:1013259
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    References listed on IDEAS

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    1. Muhammad Naveed & Haroon Sajid & Adnan Mustafa & Bushra Niamat & Zulfiqar Ahmad & Muhammad Yaseen & Muhammad Kamran & Munazza Rafique & Sunny Ahmar & Jen-Tsung Chen, 2020. "Alleviation of Salinity-Induced Oxidative Stress, Improvement in Growth, Physiology and Mineral Nutrition of Canola ( Brassica napus L.) through Calcium-Fortified Composted Animal Manure," Sustainability, MDPI, vol. 12(3), pages 1-17, January.
    2. Mikihisa Umehara & Atsushi Hanada & Satoko Yoshida & Kohki Akiyama & Tomotsugu Arite & Noriko Takeda-Kamiya & Hiroshi Magome & Yuji Kamiya & Ken Shirasu & Koichi Yoneyama & Junko Kyozuka & Shinjiro Ya, 2008. "Inhibition of shoot branching by new terpenoid plant hormones," Nature, Nature, vol. 455(7210), pages 195-200, September.
    3. Zhijia Yang & Chongwu Wang & Yuan Xue & Xiao Liu & She Chen & ChunPeng Song & Yongqing Yang & Yan Guo, 2019. "Calcium-activated 14-3-3 proteins as a molecular switch in salt stress tolerance," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
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