PJB-1984-28
Germination studies of certain desert plants.
D.KHAN, S.SHAHID
SHAUKAT AND M.FAHEEMUDDIN
Abstract
Ecological studies with seeds of some
desert species viz, achyranthes aspera L., peristrophe bicalyculata (Retz). Cassia holosericea fresn . and
prosopis juliflora Swartz are
described. Seedling growth was directly proportional to the seed
size. The seed weight distribution was homogeneous and concentrated around the mean with low variation which implied greater interaspecofic compettion in populations of these speciies. Smooth and black seed coat of P. bicalyculata and hard seed coat of C. holosericea and P. juliflora appeared to impose dormancy on seeds. A aspera seeds germinated readily within 24 h and showed no dormancy. The dormancy of P. bicalyculata disappeared y dry storage for ca. 3 months . chemical
treatments to seeds of cassia and prosopis improved germination but not to the extent ac by mechanical scarfication . the impact of dense clustering of seeds on germination showed negative response to dense clustering of C. holosericea which suggested the possibility of leaching
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