PJB-1987-5
The influence of hydroxyurea treatment on various stages of the life cycle of pteridium aquilinum L.
Khalida
khatoon.
Abstract
Hydroxyurea supplied to gametophytes of
pteridium aquilinum at various stages of development was lethal at 125 ppm . sublethal doses of hydroxyurea retarded growth and development of the sporophyte at 25 and 50 ppm whereas prolonged treatment at 100 ppm induced dormaney in the first root and lesf buds. Normal sequence of organ formation was disturbed when zygotes were exoposed to hydroxyurea immediately after
fertilization . maturing egs became non- viable . hydroxyurea at low concentration delayed spore germination whereas at high concentration inhibited establishment of cordate form. The archegonia initiated and developed
under the influence of hydroxyurea produced normal sporophytes but were weaker in appearance.
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