0000000000635917
AUTHOR
Li Vigni L
Histological studies on pistacio vegetative organs as related to fructification
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.
Mineralogy of the soils altered by fumarolic activity at Nisyros volcano, Greece
Nisyros is the easternmost island of the South Aegean Active Volcanic arc in Greece. It is an active stratovolcano known for its intense hydrothermal activity. In this study we present the results of the mineralogical analyses of 20 soil samples collected in the caldera area. Samples were analysed through X-ray diffraction and the results allow us to divide them in two groups: Lakki Plain and Stefanos Crater. In their majority the soils of Lakki Plain have a main mineralogical assemblage that consists of quartz, feldspar and gismondine (Ca2Al4Si4O16·9H2O). Gismondine as well as stellerite (CaAl2Si7O18·7H2O), which is appearing in some samples, derive from hydrothermal alteration, whilst wol…