Salicylic acid mitigates salinity stress by improving antioxidant defence system and enhances vincristine and vinblastine alkaloids production in periwinkle [Catharanthus roseus (L.) G. Don]
ABSTRACT A pot experiment was conducted to find out whether the foliar spray of salicylic acid (SA) could successfully ameliorate the
adverse effects of salinity stress on periwinkle. Thirty-day-old plants were supplied with Control; 0mM NaCl+10−5M SA (T1); 50mM NaCl+0 SA (T2); 100mM NaCl+0 SA (T3); 150mM NaCl+0 SA (T4); 50mM NaCl+10−5M SA (T5); 100mM NaCl+10−5M SA (T6); 150mM NaCl+10−5M SA (T7). The plants were sampled 90days after sowing to assess the effect of SA on stressed and unstressed plants. Salt stress
significantly reduced the growth attributes including plant height, leaf-area index, shoot and root fresh weights, shoot and
root dry weights. Increasing NaCl concentrations led to a gradual decrease in photosynthetic parameters and activities of
nitrate reductase and carbonic anhydrase. Ascorbic acid, total alkaloids and antioxidants enzymes superoxide dismutase, catalase
and peroxidase also declined in NaCl-treated plants. The plants, undergoing NaCl stress, exhibited a significant increase
in electrolyte leakage and proline content. Foliar application of SA (10−5M) reduced the damaging effect of salinity on plant growth and accelerated the restoration of growth processes. It not only
improved the growth parameters but also reversed the effects of salinity. Total alkaloid content was improved by SA application
both in unstressed and stressed plants. The highest level of total alkaloid content recorded in leaves of SA-treated stressed
plants was 11.1%. Foliar spray of SA overcame the adverse effect of salinity by improving the content of vincristine (14.0%)
and vinblastine (14.6%) in plants treated with 100M NaCl.
Catharanthus roseus (L.) G. Don–Peroxidase–Salicylic acid–Salt stress–Vincristine–Vinblastine
- SourceAvailable from: Anna Stojakowska[show abstract] [hide abstract]
ABSTRACT: The effects of methyl jasmonate (MJ) or salicylic acid (SA) on the sesquiterpene lactone content and biomass accumulation were investigated in a hairy root culture of Cichorium intybus. The guaianolides crepidiaside B (1), 8-deoxylactucin (2), and the germacranolide sonchuside A (3) were quantified by RP-HPLC. Neither MJ nor SA affected the growth of examined hairy root culture. Jasmonate up-regulated biosynthesis of the analysed sesqiterpene lactones in the culture (maximum after 72h). SA caused a transient increase in sonchuside A accumulation in the roots (up to twofold increase compared with the control) and decrease of guaianolide content.Acta Physiologiae Plantarum 29(2):127-132. · 1.31 Impact Factor
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ABSTRACT: Changes of coumarin content were induced by application of salicylic acid through the root system of 8-week-old Matricaria chamomilla plants in the stage of leaf rosette. Twenty four hours after addition of salicylic acid into culture medium, its accumulation in leaves of chamomile was registered. A decrease of (Z)- and (E)-2-β-d-glucopyranosyloxy-4-methoxycinnamic acids content and an increase of their coumarin product herniarin in leaves of chamomile were found. A considerable increase of umbelliferone was observed, with peak at the time of 72h after the treatment.Plant Science - PLANT SCI. 01/2004; 167(4):819-824.
- Journal of Experimental Botany - J EXP BOT. 01/1995; 46(12):1843-1852.