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Frankincense Tree Physiology and Its Responses to Wounding Stress

  • Ahmed Al-Harrasi
  • Abdul Latif Khan
  • Sajjad Asaf
  • Ahmed Al-Rawahi
Chapter

Abstract

Boswellia trees are often tapped using wounding or tapping for resin collection, which is an anthropogenic activity with human-derived benefits. The tree responds to these incisions by producing resin to defend itself from the attacks of fungal pathogens, herbivores and insects. Although the resin biosynthesis pathway has not yet been fully elucidated, the tree physiology of B. sacra and B. papyrifera has recently been studied. The wounding response of B. sacra in terms of biochemical modulation has been studied by assessing the endogenous phytohormones (gibberellic acid, salicylic acid, abscisic acid and jasmonic acid), essential amino acids and related gene expression. In B. papyrifera, the vapour pressure deficit and stomatal closure in response to tapping were studied through starch/sugar metabolism and leaf gas exchange. Most defence-related biochemical pathways are activated to cope with wounding stress. However, these responses may also vary depending on the tree health, climatic conditions and growth environment. Furthermore, in-depth studies are essential for understanding the growth, ecophysiology and transcriptional regulation under a variety of environmental stresses such as heat, drought and high mineral-containing soil.

Keywords

Wounding Physiochemical responses Amino acid Phytohormones Stomata Sugar metabolism Biochemical pathways Gene expression 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Ahmed Al-Harrasi
    • 1
  • Abdul Latif Khan
    • 1
  • Sajjad Asaf
    • 1
  • Ahmed Al-Rawahi
    • 1
  1. 1.University of NizwaNizwaOman

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