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This greenhouse study tested the effect of smoke‐water and the smoke‐isolated biologically active compound karrikinolide (KAR1) on growth and photosynthetic pigments of Jatropha curcas L. seedlings. Fifteen‐day‐old seedlings were sprayed once weekly for 5 weeks with three dilutions of smoke‐water (1 : 250, 1 : 500, and 1 : 1000 v/v) or KAR1 (10–7, 10–8, and 10–9 M). Growth parameters and photosynthetic...
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