Mobilization of Macro-nutrients in Cuttings of Kiwifruit (Actinidia chinensis Planch)

Movement was followed of K, Ca, Mg, P and N from wood and barkto the developing shoot of kiwi-fruit cuttings held in waterunder growth-room conditions. K, Mg and P moved to the shootfrom both wood and bark. Ca was the least mobile nutrient andreserves in the wood could account for all the Ca subsequentlyfound in the shoot. About 50 per cent of the calcium in thebark was associated with oxalate. Both wood and bark providednitrogen for the shoot. Soluble N increased with protein hydrolysis.Most of the soluble N in reserves was in the form of arginine.The wood should not be disregarded as an important site of nutrientreserves. Macro nutrient reserves, calcium, nitrogen, magnesium, phosphorus, potassium, Actinidia chinensis Planch., kiwifruit