Vol. 13 No. 2
Studies on floral biology of Tuberose (Polianthes tuberosa L.) under Tarai regions of Uttarakhand
Author(s): L. HEMANTA, 1 R. SRIVASTAVA AND 2M. P. DEVI
Abstract: Ten varieties of Tuberose i.e Prajwal, Shringar, GKTC-4, Mexican Single, Sikkim Selection, Kalyani Single, Single, Sikkim Selection, Phule Rajani and Arka Nirantara were studied for their floral biology. Anther dehiscence started simultaneously with anthesis in most of the varieties except Phule Rajani, Arka Nirantara and Single. The peak time of anthesis ranged from 9.00 to 10.00 hrs. The duration of stigma receptivity was for 48 hours for all the varieties except Arka Nirantara. Variety Phule Rajani had highest pollen sterility while Arka Nirantara had lowest pollen sterility. The pollen germination was found to be higher when 60 ppm boric acid + 15% sucrose solution was used and the highest germination (51.83%) was observed in variety Single. The pollen diameter of the varieties ranged from 145.83 μm to 212.50 μm and number of pollens was found to be maximum (271.30 X104) in Mexican Single and minimum (87.20 X104) in Phule Rajani of the large bud.
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