Chromosome number and modal karyotype in a polysomatic endangered orchid, Bulbophyllum auricomum Lindl., the Royal Flower of Myanmar

A detailed account is presented of attendant polysomatic variation in planta and elucidation of the modal karyotype in the difficult-to-study endangered orchid Bulbophyllum auricomum, known as the Royal Flower of Myanmar

Myo Ma Ma Than; Amita Pal; Sumita Jha

2011

Scholarcy highlights

  • A detailed account is presented of attendant polysomatic variation in planta and elucidation of the modal karyotype in the difficult-to-study endangered orchid Bulbophyllum auricomum, known as the Royal Flower of Myanmar
  • Polysomaty was prevalent in all seed-derived plants studied except two
  • It was noted that in addition to normal diploid cells occurring in different frequencies, root tip cells showed chromosome numbers <38 and >38
  • The polyploidization in seed-derived plants clearly indicates the heterogeneous nature of orchid seed stock
  • Detection of polyploidization in in vitro–propagated B. auricomum is valuable for conservation of this native endangered orchid species
  • This protocol could be exploited to protect this native endangered orchid species from natural extinction

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