Regulation of endogenous phytohormones and essential metabolites in frankincense-producing Boswellia sacra under wounding stress

摘要: Boswellia sacra is an economically and ecologically important frankincense-producing tree, which wounded to extract the aromatic resin. However, underlying physiological mechanisms following this wounding stress are unknown. Our current goal was elucidate regulation of key physio-molecular determinants preserved B. populations. Wounding caused a twofold increase in calcium/magnesium content reduction essential macronutrient (nitrogen) levels. Total amino acids were also reduced 1.74-fold; however, levels γ-amino butyric acid, hydroxyl-proline, β-alanine significantly higher (1- 2.2-fold). In contrast, fatty (linolenic, palmitic, stearic, linoleic acids) trees. Endogenous jasmonic acid (JA) (67%) trees, as expression JA-related genes allene oxide synthase cyclase. A similar stress-responsive abscisic observed salicylic down-regulated, pathogenesis-related PR1 PR3 exhibited varying responses plants. The presence physiologically active (GA1, GA4, GA3) inactive (GA12, GA19, GA20) gibberellins both control trees revealed similarity with known GA biosynthesis sacra. Both GA4 GA3 each synthesized, buoyed by increased expressions ent-copalyl diphosphate synthase, cytochrome P450 monooxygenases, gibberellin 20 oxidases under stress. conclusion, responds extraction resin regulating endogenous hormones related transcripts, return retard tree growth development.