Histological studies on pistacio vegetative organs as related to fructification

Abstract

Histological Studies on Pistachio Vegetative Organs as Related to Fructification Effects of fruiting on histological structure and histochemical characteristics of shoots, leaves and roots of pistachio (Pistacia vera L.) were microscopically examined on tissues sampled from trees with different crop-loads and carbohydrate reserves availability (bearing, non-bearing and trees subjected to inflorescence-bud removal twenty days before full bloom for four consecutive years). Differences in cambium activity and xylem and phloem structure in several developmental stages are reported. Starch content was higher in “deblossomed” than in non-bearing and bearing trees.