Abstract
Chickpea (Cicer arietinum L.) seedlings growing on different concentrations of inorganic phosphate and pyrophosphate in agar based MS-medium were studied for their growth and activities of phosphatases in cotyledon, shoots and roots. Growth of seedlings was affected with both Inorganic Phosphate (Pi) and Pyrophosphate (PPi). Germination was completely inhibited beyond 100 mM monopotassium phosphate (KH2PO4) and 20 mM sodium pyrophosphate. Specific activities of acid phosphatases of cotyledons, shoots and roots decreased under high Pi-supply however alkaline phosphatases were not affected. Addition of PPi increased specific activities of acid phosphatases of roots and shoots at 3 days after germination (DAG) stage, but decreased at later stages of seedling growth. There was an appearance of PPi-specific acid phosphatase in roots under PPi-supply.
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