Movement was followed of K, Ca, Mg, P and N from wood and bark to the developing shoot of kiwi-fruit cuttings held in water under growth-room conditions. K, Mg and P moved to the shoot from both wood and bark. Ca was the least mobile nutrient and reserves in the wood could account for all the Ca subsequently found in the shoot. About 50 per cent of the calcium in the bark was associated with oxalate. Both wood and bark provided nitrogen 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 nutrient reserves.
No takes yet. Share an insight, caveat, or question.
Ferguson et al. (1981) studied this question.