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Horticulture, Environment, and Biotechnology

, Volume 59, Issue 4, pp 461–471 | Cite as

Salicylic acid and kinetin mediated stimulation of salt tolerance in cucumber (Cucumis sativus L.) genotypes varying in salinity tolerance

  • Ali Raza Gurmani
  • Sami Ullah Khan
  • Amjad Ali
  • Tehseen Rubab
  • Timothy Schwinghamer
  • Ghulam Jilani
  • Abid Farid
  • Jinlin Zhang
Research Report Cultivation Physiology
  • 143 Downloads

Abstract

Greenhouse studies were undertaken to evaluate the genetic performance of two cucumber genotypes (Long Green and Summer Green) at four salinity levels (0, 25, 50, and 100 mM NaCl). Seeds were pretreated with 50 mg salicylic acid (SA) L−1 and 25 mg kinetin (Kin) L−1. Under hydroponic conditions, seed pretreatment with Kin significantly increased shoot and root dry biomass and reduced the salt injury index in both genotypes. SA reduced the salt injury index of Long Green cucumbers. In a pot experiment, Kin treatment reduced Na+ and increased K+ concentration, photosynthesis, and chlorophyll content in both genotypes, compared to SA under saline soil conditions. Kin treatment improved fruit yield in both genotypes, while SA had a statistically significant effect on Long Green fruit yield. The application of SA and Kin enhanced salinity tolerance in both genotypes by the activation of antioxidants, especially superoxide dismutase, peroxidase, and catalase, which offset oxidative injury. Summer Green exhibited better salt tolerance and improved osmoregulation that resulted in higher fruit yield than Long Green. It was concluded that cucumber genotypes differed in salt tolerance, and seed pre-treatment with Kin minimized salt stress injury, even in sensitive genotype which could sustain crop production under saline conditions.

Keywords

Cucumber Fruit yield Ionic regulation Kinetin Salicylic acid Salt tolerance 

Notes

Acknowledgements

The authors are thankful to Dr. Jalal-Ud-Din, Principal Scientist, Plant Physiology Program, Crop Sciences Institute, National Agricultural Research Centre, Islamabad, Pakistan for chemical analysis and technical discussion.

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Copyright information

© Korean Society for Horticultural Science and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Ali Raza Gurmani
    • 1
    • 5
  • Sami Ullah Khan
    • 2
  • Amjad Ali
    • 3
  • Tehseen Rubab
    • 4
  • Timothy Schwinghamer
    • 5
  • Ghulam Jilani
    • 6
  • Abid Farid
    • 7
  • Jinlin Zhang
    • 8
  1. 1.Department of Soil SciencesThe University of HaripurHaripurPakistan
  2. 2.Department of AgronomyThe University of HaripurHaripurPakistan
  3. 3.Department of HorticultureThe University of Agriculture PeshawarPeshawarPakistan
  4. 4.Department of BiochemistryPMAS Arid Agriculture University RawalpindiRawalpindiPakistan
  5. 5.Department of Plant Science, Macdonald CampusMcGill UniversitySte Anne de BellevueCanada
  6. 6.Department of Soil Science and SWCPMAS Arid Agriculture University RawalpindiRawalpindiPakistan
  7. 7.Department of EntomologyThe University of HaripurHaripurPakistan
  8. 8.State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhouChina

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