PJB-1999-34
EFFECT OF LIGHT AND TWO ISOMERS OF NITROPHENYL INDOLE-2-CARBOXYLIC ACID ON GERMINATION OF CENCHRUS CILIARIS SEEDS
M. SHAFIQ CHAUDHRY*, MISBAHUL AIN KHAN** AND FAIZ-UL HASSAN NASIM
Abstract
Effect of light and different concentrations of m- and p- isomers of 1-nitrophenyl indole-2-carboxylic acid (NPICA) has been investigated on the germination of Cenchrus ciliaris seeds. Light not only delayed germination of the seeds but also reduced the germination by >62 %. Presence of 15 to 45 ppm of either 1m- or 1-p-NPICA in the germination medium showed a negative effect on seed germination whereas, presence of 30 ppm of either of the two isomers improved germination, albeit slightly and only in the presence of light.
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