Salicylic Acid: Physiological Roles in Plants

  • Mohammad Yusuf
  • Shamsul HayatEmail author
  • Mohammed Nasser Alyemeni
  • Qazi Fariduddin
  • Aqil Ahmad


Since ancient times, salicylic acid has been in use by humans because of its therapeutic properties. Salicylic acid, chemically known as 2-hydroxy benzoic acid is one of a diverse group of phenolic compounds, consisting of an aromatic ring bearing a hydroxyl group or its functional derivative, which is synthesized by plants. Salicylic acid biosynthetic pathway in plants has two distinct pathways, the isochorismate (IC) pathway and the phenylalanine ammonia-lyase (PAL) pathway. Moreover, salicylic acid plays exclusive role in plant growth, thermogenesis, flower induction and uptake of ions. It affects ethylene biosynthesis, stomatal movement and also reverses the effects of ABA on leaf abscission. In addition to this, it also enhances the level of photosynthetic pigments, photosynthetic rate and modifies the activity of some of the important enzymes as well. This chapter provides the reader with a comprehensive coverage to above aspects more exclusively with future prospects.


Growth Photosynthesis Salicylic acid Senescence Yield 


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© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Mohammad Yusuf
    • 1
  • Shamsul Hayat
    • 1
    • 2
    Email author
  • Mohammed Nasser Alyemeni
    • 2
  • Qazi Fariduddin
    • 1
  • Aqil Ahmad
    • 1
  1. 1.Plant Physiology Section, Department of BotanyAligarh Muslim UniversityAligarhIndia
  2. 2.Department of Botany and Microbiology, College of ScienceKing Saud UniversityRiyadhSaudi Arabia

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