Study on Gametophytes of Four Species of Maiden Hair Ferns (Adiantum L.) and Their Systematic Implications

  • Sanatombi Devi YUMKHAM Manipur University, Ethnobotany & Plant Physiology Laboratory, Centre of Advanced Studies in Life Sciences, Canchipur 795 003
  • Sumitra SALAM Nambol L. Sanoi College, Department of Botany, Nambol 795 134, Manipur
  • Sandhyarani D. KHOMDRAM Mizoram University, Department of Botany, Aizawl 796 004, Mizoram
Keywords: Adiantum; germination; morphology; prothallus; sporophytes; systematics

Abstract

Matured spores of four (4) species of maiden hair ferns namely, Adiantum capillus-veneris L., A. caudatum L., A. edgeworthii Hook. and A. incisum Forssk. were collected and grown in petri-dishes containing natural media formed by mixing dead wood of tree fern (Cyathea Sm.), sand and charcoal powder (2:1:1). The cultures in triplicates for each species were monitored every day from the stage of sowing to the chimera formation. After disintegration of gametophytes, juvenile sporophytes were shifted to pots and morphological characters were studied till the dehiscence of sporangia. Spore germination initiated between 4-6 days for A. capillus-veneris, 7-9 days in A. caudatum and A. incisum and 10-12 days in A. edgeworthii.  Prothallia in all the Adiantum are autotrophic, Vittaria type, cordate-shaped, homosporous with antheridia developing earlier than archegonia and remain confined on the adaxial surface. The gametophytes showed considerable variation in their shapes, orientation of lobes, presence or absence of hairs and placement of sex organs on the prothallia. The gametophytic and sporophytic characters are correlated and used in structuring key to species. The study concludes that gametophytic characters also constitute a dependable criterion for assessing their systematics.

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Published
2019-09-30
How to Cite
YUMKHAM, S. D., SALAM, S., & KHOMDRAM, S. D. (2019). Study on Gametophytes of Four Species of Maiden Hair Ferns (Adiantum L.) and Their Systematic Implications. Notulae Scientia Biologicae, 11(3), 455-461. https://doi.org/10.15835/nsb11310471
Section
Research articles