High frequency in vitro propagation of Trichopus zeylanicus subsp. travancoricus using branch–petiole explants

• Autorzy: Martin K.P. , Pradeep A. K. , Madassery J.
• Języki publikacji: EN

Abstrakty

EN

Trichopus zeylanicus subsp. travancoricus (known as Arogyapacha), an endangered ethnomedicinal plant of the Western Ghats of South India, serves as the major source of the commercial drug Jeevani. The present study established a long-term high frequency in vitro propagation protocol for Arogyapacha. Callus obtained from the branch–petiole explants cultured on Murashige and Skoog (MS) medium with 4.5 µM 2,4-dichlorophenoxyacetic acid upon subculture to medium with different concentrations of 6-benzyladenine (BA) either alone or in combination with an auxin favoured shoot morphogenesis. Medium with 13.3 µM BA alone facilitated high frequency shoot bud (mean of 93.2) formation. Medium with lower concentrations of BA (4.4, 6.6 and 8.8 µM) alone or in combination with lower concentration of a-naphthaleneacetic acid (NAA) or indole-3-butyric acid (IBA) favoured better shoot growth than 13.3 µM BA containing medium, but with reduced number of shoot buds. Subsequent cultures on medium with lower concentrations of BA and also on MS basal media facilitated shoot formation as well as growth of shoots. The shoot regeneration potential showed no decline up to 5 years. Culture of the in vitro-derived whole branch–leaf explants on MS basal medium developed shoots directly from the node. On medium with 19.6 µM IBA, the whole branch–leaf explants induced nodular callus from the node, which developed shoots later. Subsequent cultures on medium with BA exhibited high frequency shoot formation. The transfer of shoots after 10–15 days culture on half-strength MS medium containing 2.7 µM NAA to half-strength basal medium induced a mean of 11.3 roots. Field survival of plantlets relied on the soil mix: a 1:4 ratio of sand and red-soil exhibited the highest plantlets survival (86.6%). RAPD profile of the source plant and plants regenerated from calli after 4 years showed no polymorphism. The established plantlets with morpho-floral features similar to that of the source plants flowered normally and set fruits.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2011
• Tom: 33
• Numer: 4
• Opis fizyczny: p.1141-1148,fig.,ref.

Twórcy

autor

Martin K.P.

• Department of Biotechnology University of Calicut, Culicut, Kerala 673 635, India

autor

Pradeep A. K.

• Department of Botany, University of Calicut, Culicut, Kerala 673 635, India

autor

Madassery J.

• Department of Plant Sciences, University of California, One Shields Ave., Davis, CA 95616, USA

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