Article

Salicylic acid mitigates salinity stress by improving antioxidant defence system and enhances vincristine and vinblastine alkaloids production in periwinkle [Catharanthus roseus (L.) G. Don]. Acta Physiologiae Plantarum, 33, 987-999

Acta Physiologiae Plantarum (Impact Factor: 1.58). 05/2011; 33(3):987-999. DOI: 10.1007/s11738-010-0631-6

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.

KeywordsAscorbic acid–Antioxidant–Catalase–
Catharanthus roseus (L.) G. Don–Peroxidase–Salicylic acid–Salt stress–Vincristine–Vinblastine

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    • "Salicylic acid, well known for the systemic acquired resistance it induces in the plant response to many pathogens, can also elicit the production of secondary metabolites in plants (Hayat et al., 2010; Pieterse and van Loon, 1999). It stimulated the production of alkaloids such as vincristine and vinblastine in periwinkle (Idrees et al., 2010), the tropane alkaloid scopolamine in hairy root cultures of Brugmansia candida (Pitta-Alvarez et al., 2000), and pilocarpine in jaborandi leaves (Avancini et al., 2003). Anthraquinone production was greatly increased in Rubia cordifolia after a salicylic acid treatment (Bulgakov et al., 2002), as was GS in oilseed rape (Brassica napus L.) (Kiddle et al., 1994). "
    Chapter: Elicitation
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    ABSTRACT: Although there is a plethora of traditional plants with great therapeutic potential, the majority of medicinal plants have yet to be utilized on a large scale. One of the main reasons for this is the chemical variability inherent in plant-derived therapeutics. Many of the medically useful secondary metabolites produced by plants are the result of the latter's response to stress. When medicinal plants taken from the wild are cultivated under “optimal” growing conditions, the natural stressors on the plant are removed and, therefore, the content of secondary metabolites and, consequently, the therapeutic activity of the plants are greatly reduced. A possible aid in overcoming these difficulties is elicitation, the use of biotic and abiotic elicitors to stimulate the stress response in plants and increase the content of biologically active compounds. Elicitation has already been utilized in the study of disease resistance in plants, as well as in metabolic studies in cell culture. Elicitation can also be a powerful aid in the characterization and development of many potentially beneficial medicinal plants. This review summarizes the current state of knowledge concerning the utilization of biotic and abiotic elicitors in plants.
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    • "Salicylic acid, well known for the systemic acquired resistance it induces in the plant response to many pathogens, can also elicit the production of secondary metabolites in plants (Hayat et al., 2010; Pieterse and van Loon, 1999). It stimulated the production of alkaloids such as vincristine and vinblastine in periwinkle (Idrees et al., 2010), the tropane alkaloid scopolamine in hairy root cultures of Brugmansia candida (Pitta-Alvarez et al., 2000), and pilocarpine in jaborandi leaves (Avancini et al., 2003). Anthraquinone production was greatly increased in Rubia cordifolia after a salicylic acid treatment (Bulgakov et al., 2002), as was GS in oilseed rape (Brassica napus L.) (Kiddle et al., 1994). "

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    • "2002 ) Application of phosphorus and humic acid Pepper Cimrin et al . ( 2010 ) Application of glycinebetaine or proline Maize , rice , melon , canola Sakr et al . ( 2012 ) , Yang and Lu ( 2005 ) , Demiral and Turkan ( 2006 ) , Kaya et al . ( 2007 ) Application of salicylic acid Mungbean , periwinkle Khan et al . ( 2010 ) , Nazar et al . ( 2011 ) , Idrees et al . ( 2011 ) Application of silicon Rose Reezi et al . ( 2009 ) Ausubel F , Benfey P ( 2002 ) Arabidopsis functional genomics . Plant Physiol 129 : 393 – 393 . doi : 10 . 1104 / Pp . 900036 Babiychuk E , Kushnir S , Belles - Boix E , Van Montagu M , Inzé D ( 1995 ) Arabidopsis thaliana NADPH oxidoreductase homologs confer tolerance of yeasts towar"
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