Abstract
Centella asiatica (Indian pennywort) has wide application in Indian and Chinese traditional medicines with documented evidence for wound healing and neuroprotective and anti-aging potential. Asiaticoside, a trisaccharide triterpene, is the most medicinally active compound in the plant. β-Amyrin synthase and squalene synthase have been identified as the two key genes in the triterpenoid pathway which regulate the production of asiaticoside in C. asiatica. The paper reports salient findings of our study utilizing the growth-promoting endophytic fungus Piriformospora indica to successfully colonize roots of C. asiatica in vitro cultures for investigating the effect of the mutualistic association on asiaticoside production. Co-cultivation of P. indica resulted in the rapid enhancement of root and shoot biomass of host plant, which was visible after 7 days of culture and continued up to 45 days. P. indica co-cultivation also favored the synthesis of asiaticosides, as evidenced by HPLC analysis which indicated about twofold increase (0.53% (w/w) in leaves and 0.23% (w/w) in whole plant) over control (0.33% (w/w) in leaves and 0.14% (w/w) in whole plant). Real-time PCR results confirmed the strong upregulation of squalene synthase and β-amyrin synthase transcripts in P. indica-challenged plants compared with the control. Our data demonstrate the potential use of P. indica as a means to enhance plant secondary metabolite production in planta with scope for further field evaluation.
Similar content being viewed by others
References
Aziz ZA, Davey MR, Power JB, Anthony P, Smith RM, Lowe KC (2007) Production of asiaticoside and madecassoside in Centella asiatica in vitro and in vivo. Biol Plant 51:34–42
Baldi A, Srivastava AK, Bisaria VS (2009) Fungal elicitors for enhanced production of secondary metabolites in plant cell suspension cultures. Soil Biol 18:373–380
Barazani O, Benderoth M, Groten K, Kuhlemeier N, Baldwin IT (2005) Piriformospora indica and Sebacina vermifera increase growth performance at the expense of herbivore resistance in Nicotiana attenuata. Oecologia 146:234–243
Bolton MD (2009) Primary metabolism and plant defense—fuel for the fire. Mol Plant Microbe Interact 22:487–497
Bradwejn J, Zhou Y (2000) A double-blind, placebo-controlled study on the effects of Gotu Kola (Centella asiatica) on acoustic startle response in healthy subjects. J Clin Psychopharmacol 20:680–684
Brinkhause B, Lindner M (2000) Chemical, pharmacological and clinical profile of the East Asian medical plant Centella asiatica. Phytomedicine 7:427–448
Buetehorn B, Rhody D, Franken P (2000) Isolation and characterization of Pitef1 encoding the translation elongation factor EF-1-alpha of the root endophyte Piriformospora indica. Plant Biol 2:687–692
Devarenne TP, Ghosh A, Chappell J (2002) Regulation of squalene synthase, a key enzyme of sterol biosynthesis, in tobacco. Plant Physiol 129:1095–1106
Gao FK, Dai CC, Liu XZ (2010) Mechanisms of fungal endophytes in plant protection against pathogens. Afr J Microbiol Res 4:1346–1351
Haralampidis K, Trojanowska M, Osbourn AE (2002) Biosynthesis of triterpenoid saponins in plants. Adv Biochem Eng Biotechnol 75:31–49
Hausen BM (1993) Centella asiatica (Indian pennywort), an effective therapeutic but a weak sensitizer. Contact Dermatitis 29:175–179
Hayashi H, Huang PY, Inoue K (2003) Up-regulation of soyasaponin biosynthesis by methyl jasmonate in cultured cells of Glycyrrhiza glabra. Plant Cell Physiol 44:404–411
Hernandez-Vazquez L, Bonfill M, Moyano E, Cusido RM, Navarro-Ocaña A, Palazon J (2010) Conversion of α-amyrin into centellosides by plant cell cultures of Centella asiatica. Biotechnol Lett 32:315–319
Jakobsen L, Abbott K, Robson AD (1992) External hyphae of vesicular–arbuscular mycorrhizal fungi associated with Trifolium subterraneum. I. Spread of hyphae and phosphorus inflow into roots. New Phytol 120:371–380
Jenner L, Romby P, Rees B, Schulze-Briese C, Springer M, Ehresmann C, Ehresmann B, Moras D, Yusupova G, Yusupov M (2005) Translational operator of mRNA on the ribosome. How repressor proteins exclude ribosome binding. Science 308:120–123
Khan SA, Hamayun M, Yoon HJ (2008) Plant growth promotion and Penicillium citrinum. BMC Microbiol 8:231
Kim OT, Kim MY, Hong MH, Ahn JC, Hwang B (2004) Stimulation of asiaticoside production from Centella asiatica whole plant cultures by elicitors. Plant Cell Rep 23:339–344
Kim OT, Kim MY, Huh SM, Bai DG, Ahn JC, Hwang B (2005) Cloning of a cDNA probably encoding oxidosqualene cyclase associated with asiaticoside biosynthesis from Centella asiatica (L.) Urban. Plant Cell Rep 24:304–311
Kim OT, Bang KH, Shin YS, Lee MJ, Jung SJ, Hyun DY, Kim YC, Seong NS, Cha SW, Hwang B (2007) Enhanced production of asiaticoside from hairy root cultures of Centella asiatica (L.) Urban elicited by methyl jasmonate. Plant Cell Rep 26:1941–1949
Mangas S, Bonfill M, Osuna L, Moyano T, Tortoriello J, Guido RM, Piñol MT, Palazón J (2006) The effect of methyl jasmonate on triterpene and sterol metabolism of Centella asiatica, Ruscus aculeatus and Galphimia glauca cultured plants. Phytochemistry 67:2041–2049
Mangas S, Moyano E, Osuna L, Cusido RM, Bonfill M, Palazón J (2008) Triterpenoid saponin content and the expression level of some related genes in calli of Centella asiatica. Biotechnol Lett 30:1853–1859
Maquart FX, Chastang F, Simeon A, Birembaut P, Gillery P, Wegrowski Y (1999) Triterpenes from Centella asiatica stimulate extracellular matrix accumulation in rat experimental wounds. Eur J Dermatol 9:289–296
Murashige T, Skoog F (1962) A revised medium for rapid growth and bioassays with tobacco tissue culture. Physiol Plant 15:473–497
Peskan-Berghöfer T, Shahollari B, Giong PH, Hehl S, Markert C, Blanke V, Kost G, Varma A, Oelmüller R (2004) Association of Piriformospora indica with Arabidopsis thaliana roots represents a novel system to study beneficial plant–microbe interactions and involves early plant protein modifications in the endoplasmic reticulum and at the plasma membrane. Physiol Plant 122:465–477
Pham GH, Singh KR, Sachdev M, Prasad R, Kaldorf M, Buscot F, Oelmuller R, Peskan T, Weiss M, Hampp R, Varma A (2004) Axenic cultures of Piriformosora indica. In: Varma A, Abbott L, Werner D, Hampp R (eds) Plant surface microbiology. Springer, Berlin, pp 593–616
Phillip JM, Hayman DS (1970) Improved procedures for clearing roots and staining parasitic and VAM fungi for rapid assessment of infection. Trans Br Mycol Soc 55:158–161
Rai MK, Varma A (2005) Arbuscular mycorrhizae—like biotechnological potential of Piriformospora indica, which promotes the growth of Adhatoda vasica. Electron J Biotechnol 8:107–112
Rogers SO, Bendich AJ (1994) Extraction of total cellular DNA from plants, algae and fungi. In: Gelvin SB, Schilperoort RA (eds) Plant molecular biology manual, 2nd edn. Kluwer, Dordrecht, pp 1–8
Serfling A, Wirsel SGR, Lind V, Deising HB (2007) Performance of the biocontrol fungus Piriformospora indica on wheat under green house and field conditions. Phytopathology 97:523–531
Sun C, Johnson JM, Cai D, Sherameti I, Oelmuller R, Lou B (2010) Piriformospora indica confers drought tolerance in Chinese cabbage leaves by stimulating antioxidant enzymes, the expression of drought-related genes and the plastid-localized CAS protein. J Plant Physiol 167:1009–1017
Varma A, Verma S, Sudha S, Sahay N, Bütehorn B, Franken P (1999) Piriformospora indica, a cultivable plant-growth-promoting root endophyte. Appl Environ Microbiol 65:2741–2744
Verma S, Varma A, Rexer KH, Hassel A, Kost G, Sarabhoy A, Bisen P, Bütenhorn B, Franken P (1998) Piriformospora indica, gen. et sp. nov., a root colonizing fungus. Mycologia 90:896–903
Visweswari G, Siva Prasad K, Lokanatha V, Rajendra W (2010) The antiepileptic effect of Centella asiatica on the activities of Na+/K+, Mg2+ and Ca2+-ATPases in rat brain during pentylenetetrazol-induced epilepsy. Indian J Pharmacol 42:82–86
Waller F, Achatz FB, Baltruschat H, Fodor J, Becker K, Fischer M, Heier T, Huckelhoven R, Neumann C, von Wettstein D, Franken P, Kogel KH (2005) The endophytic fungus Piriformospora indica reprograms barley to salt-stress tolerance, disease resistance, and higher yield. Proc Natl Acad Sci 102:13386–13391
Weiss M, Selosse MA, Rexer KH, Urban A, Oberwinkler F (2004) Sebacinales: a hitherto overlooked cosm of heterobasidiomycetes with a broad mycorrhizal potential. Mycol Res 108:1003–1010
Widgerow AD, Chait LA (2000) New innovations in scar management. Aesthet Plast Surg 24:227–234
Wright CS (1984) Structural comparison of the two distinct sugar binding sites in wheat germ agglutinin isolectin II. J Mol Biol 178:91–104
Yendo ACA, Costa FD, Gosmann G, Fett-Neto AG (2010) Production of plant bioactive triterpenoid saponins: elicitation strategies and target genes to improve yields. Mol Biotechnol 46:94–104
Acknowledgments
The authors thank Natural Remedies Pvt. Ltd, Bangalore, Karnataka, India, for HPLC analysis and the National Institute for Interdisciplinary Science and Technology (Council of Scientific and Industrial Research, Government of India), Thiruvananthapuram, Kerala, India, for SEM analysis. We also thank the Indian Council of Medical Research (ICMR, grant no. No.3/1/JRF/74/MPD-2007) for providing the Senior Research Fellowship.
Author information
Authors and Affiliations
Corresponding author
Electronic supplementary material
Below is the link to the electronic supplementary material.
ESM. 1
Analysis of P. indica colonization by Trypan blue staining. Spores of P. indica inside the root of C. asiatica (JPEG 9 kb)
ESM. 2
SEM images of the control non-colonized C. asiatica (a) and P. indica co-cultured roots after 10 h (b). Arrow indicates fungal penetration into the root (JPEG 25 kb)
ESM. 3
PCR analysis of PITEF in root (a) and leaf tissue of P. indica-colonized plant (b). Lane 1 Tissues from the non-colonized plants; lane 2 tissues from P. indica-colonized plant; lane 3 P. indica as the positive control; lane 4 negative control (JPEG 9 kb)
ESM. 4
Pathway showing the biosynthesis of asiaticoside (JPEG 1 kb)
Rights and permissions
About this article
Cite this article
Satheesan, J., Narayanan, A.K. & Sakunthala, M. Induction of root colonization by Piriformospora indica leads to enhanced asiaticoside production in Centella asiatica . Mycorrhiza 22, 195–202 (2012). https://doi.org/10.1007/s00572-011-0394-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00572-011-0394-y