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Investigation of the proline role in controlling traits related to sugar and root yield of sugar beet under water deficit conditions

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  • Ghaffari, Hamideh
  • Tadayon, Mahmoud Reza
  • Bahador, Mahmoud
  • Razmjoo, Jamshid

Abstract

Sugar beet (Beta vulgaris L.), accounting for 30 percent of the total world sugar production, maybe affected by drought in terms of both its yield and quality. Proline is an amino acid with pivotal role in plant responses to drought stress. The present experiment was conducted at two locations during 2015. The treatments included 100 %, 75 %, and 50 % irrigation water requirements (IWR) and 0, 5, and 10 mM of proline. Drought stress reduced root diameter and length, K content, alkalinity coefficient, molasses content, root yield, and white sugar and sugar yields, but increased leaf and root proline content, Na, α-N, and sugar and white sugar contents. However, proline application improved yield and food quality of sugar beet and 10 mM proline was more effective. Sugar and white sugar yields increased by 18 % and 15 % by 10 mM proline respectively. Combination of 50 % IWR and 10 mM proline application increased root yield by 26 % as compared to drought stress alone. The results showed that proline is the most sensitive osmoticum in sugar beet’s response to water stress and improvement in water relations and osmoregulatory measure in yield and quality of sugar beet.

Suggested Citation

  • Ghaffari, Hamideh & Tadayon, Mahmoud Reza & Bahador, Mahmoud & Razmjoo, Jamshid, 2021. "Investigation of the proline role in controlling traits related to sugar and root yield of sugar beet under water deficit conditions," Agricultural Water Management, Elsevier, vol. 243(C).
    • Handle: RePEc:eee:agiwat:v:243:y:2021:i:c:s0378377420313706
    DOI: 10.1016/j.agwat.2020.106448
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    1. Lv, Rujie & Shang, Qingyin & Lv, Fengjuan & Wang, Ruiqing & He, Junhai & Wei, Lingen, 2025. "Optimizing nitrogen application rate through critical nitrogen concentration dilution curves for sesame under different water conditions," Agricultural Water Management, Elsevier, vol. 316(C).
    2. Yangyang Li & Zengyuan Tian & Jixia Su & Kaiyong Wang & Pengpeng Zhang & Hua Fan, 2026. "Decoupling of stomatal and mesophyll recovery drives photosynthetic resilience to water deficit in sugar beet: evidence from multiscale structural and functional traits," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 72(1), pages 49-65.
    3. Zhang, Junxiao & Wang, Qianqing & Xia, Guimin & Wu, Qi & Chi, Daocai, 2021. "Continuous regulated deficit irrigation enhances peanut water use efficiency and drought resistance," Agricultural Water Management, Elsevier, vol. 255(C).
    4. Wenfei Guo & Wenchao Zhang & Liebao Han, 2024. "Effects of Water–Nitrogen Interaction on Sandy Soil, Physiology, and Morphology of Tall Fescue ( Festuca arundinacea Schreb) Turf," Agriculture, MDPI, vol. 14(11), pages 1-17, October.

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