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논문검색

Towards Conservation of Threatened Ceropegia Species Endemic to a Biodiversity Hotspot: In Vitro Microtuber Production and Proliferation, a Novel Strategy

초록

영어

Twenty-eight of 44 Indian Ceropegia species are endemic and their survival is threatened. As a step towards conservation, we implied in vitro methods for the sustainable propagule production in C. hirsuta, C. lawii, C. maccannii, C. oculata and C. sahyadrica. Effects of explant, growth regulators, sucrose and photoperiod were studied. High frequency microtuber production was achieved with the seedling-apical buds, grown on MS medium containing 4-6 mg l-1 BAP, 3-8% (w/v) sucrose, under continuous illumination. Each microtuber, when subcultured proliferated to form a cluster of secondary microtubers. Every primary and secondary microtuber bore at least one shoot-bud and a root primordium. Each tuber (formed with any of the significantly effective treatments) weighed more than 500 mg, enough to plant directly in non-sterilized soils. Microtubers could be produced and proliferated round the year. Proliferation could be solely attributed to in vitro procedures as these plants bear solitary tubers in vivo. Microtubers could be sprouted in vitro to prepare ready to pot plantlets. As, this novel method succeeded for all five species, though they belong to different eco-physiological backgrounds, we recommend its implementation in the conservation programs for a broader range of Ceropegia species, supported by other integrated strategies.

목차

ABSTRACT
 INTRODUCTION
 MATERIALS AND METHODS
 RESULTS
  Morphology of microtubers
  Effect of explant
  Effect of PGRs on microtuberization
  Effect of sucrose on tuberization
  Effect of day length on tuberization
  Species specific response
  Sprouting of tubers
 DISCUSSION
 ACKNOWLEDGEMENTS
 LITERATURE CITED

저자정보

  • Sagar Subhash Pandit 1Plant Molecular Biology Unit, Division of Biochemical Sciences, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411008, MS, INDIA
  • Aneeshkumar Nair 1Plant Molecular Biology Unit, Division of Biochemical Sciences, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411008, MS, INDIA
  • Dhiraj Dilip Naik Department of Biology, West Virginia University, 53 Campus Drive, P.O. Box 6057, Morgantown, WV-26506, USA

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