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Stomatal Regulation and Osmotic Adjustment in Sorghum in Response to Salinity

Author

Listed:
  • Pablo Rugero Magalhães Dourado

    (Agronomy Department, Av. Dom Manuel de Medeiros, Dois Irmãos, Recife CEP 52171-900, Brazil)

  • Edivan Rodrigues de Souza

    (Agronomy Department, Av. Dom Manuel de Medeiros, Dois Irmãos, Recife CEP 52171-900, Brazil)

  • Monaliza Alves dos Santos

    (Agronomy Department, Av. Dom Manuel de Medeiros, Dois Irmãos, Recife CEP 52171-900, Brazil)

  • Cintia Maria Teixeira Lins

    (Agronomy Department, Av. Dom Manuel de Medeiros, Dois Irmãos, Recife CEP 52171-900, Brazil)

  • Danilo Rodrigues Monteiro

    (Agronomy Department, Av. Dom Manuel de Medeiros, Dois Irmãos, Recife CEP 52171-900, Brazil)

  • Martha Katharinne Silva Souza Paulino

    (Agronomy Department, Av. Dom Manuel de Medeiros, Dois Irmãos, Recife CEP 52171-900, Brazil)

  • Bruce Schaffer

    (Tropical Research and Education Center, Department of Horticultural Sciences, Institute of Food and Agricultural Sciences, University of Florida, 18905 S.W. 280 Street, Homestead, FL 33031, USA)

Abstract

Sorghum bicolor (L.) Moench, one of the most important dryland cereal crops, is moderately tolerant of soil salinity, a rapidly increasing agricultural problem due to inappropriate irrigation management and salt water intrusion into crop lands as a result of climate change. The mechanisms for sorghum’s tolerance of high soil salinity have not been elucidated. This study tested whether sorghum plants adapt to salinity stress via stomatal regulation or osmotic adjustment. Sorghum plants were treated with one of seven concentrations of NaCl (0, 20, 40, 60, 80, or 100 mM). Leaf gas exchange (net CO 2 assimilation (A), transpiration (Tr); stomatal conductance of water vapor (gs), intrinsic water use efficiency (WUE)), and water ( Ψw ), osmotic ( Ψo ), and turgor Ψt potentials were evaluated at 40 days after the imposition of salinity treatments. Plants exhibited decreased A, gs, and Tr with increasing salinity, whereas WUE was not affected by NaCl treatment. Additionally, plants exhibited osmotic adjustment to increasing salinity. Thus, sorghum appears to adapt to high soil salinity via both osmotic adjustment and stomatal regulation.

Suggested Citation

  • Pablo Rugero Magalhães Dourado & Edivan Rodrigues de Souza & Monaliza Alves dos Santos & Cintia Maria Teixeira Lins & Danilo Rodrigues Monteiro & Martha Katharinne Silva Souza Paulino & Bruce Schaffer, 2022. "Stomatal Regulation and Osmotic Adjustment in Sorghum in Response to Salinity," Agriculture, MDPI, vol. 12(5), pages 1-12, May.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:5:p:658-:d:807302
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    Citations

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    Cited by:

    1. Carla Ingryd Nojosa Lessa & Claudivan Feitosa de Lacerda & Cláudio Cesar de Aguiar Cajazeiras & Antonia Leila Rocha Neves & Fernando Bezerra Lopes & Alexsandro Oliveira da Silva & Henderson Castelo So, 2023. "Potential of Brackish Groundwater for Different Biosaline Agriculture Systems in the Brazilian Semi-Arid Region," Agriculture, MDPI, vol. 13(3), pages 1-22, February.
    2. Chunyu Li & Zhichao Wang & Yutao Xu & Jingfei Sun & Xinyi Ruan & Xuanwen Mao & Xiangyun Hu & Peng Liu, 2023. "Analysis of the Effect of Modified Biochar on Saline–Alkali Soil Remediation and Crop Growth," Sustainability, MDPI, vol. 15(6), pages 1-17, March.
    3. Ruixia Chen & Lijian Zheng & Jinjiang Zhao & Juanjuan Ma & Xufeng Li, 2023. "Biochar Application Maintains Photosynthesis of Cabbage by Regulating Stomatal Parameters in Salt-Stressed Soil," Sustainability, MDPI, vol. 15(5), pages 1-15, February.
    4. Hans Raj Gheyi & Devinder Sandhu & Claudivan Feitosa de Lacerda, 2023. "Fields of the Future: Pivotal Role of Biosaline Agriculture in Farming," Agriculture, MDPI, vol. 13(9), pages 1-5, September.
    5. Mădălina Trușcă & Ștefania Gâdea & Roxana Vidican & Vlad Stoian & Anamaria Vâtcă & Claudia Balint & Valentina Ancuța Stoian & Melinda Horvat & Sorin Vâtcă, 2023. "Exploring the Research Challenges and Perspectives in Ecophysiology of Plants Affected by Salinity Stress," Agriculture, MDPI, vol. 13(3), pages 1-19, March.
    6. Takalani Mulaudzi & Mulisa Nkuna & Gershwin Sias & Ibrahima Zan Doumbia & Njagi Njomo & Emmanuel Iwuoha, 2022. "Antioxidant Capacity of Chitosan on Sorghum Plants under Salinity Stress," Agriculture, MDPI, vol. 12(10), pages 1-20, September.
    7. María del Pino Palacios-Diaz & Juan Ramón Fernández-Vera & Jose Manuel Hernández-Moreno & Regla Amorós & Vanessa Mendoza-Grimón, 2023. "Effect of Irrigation Management and Water Quality on Soil and Sorghum bicolor Payenne Yield in Cape Verde," Agriculture, MDPI, vol. 13(1), pages 1-18, January.

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