sea level). Not only in Hungary but also in the whole Carpathian Basin, the most commonly grown ‘Milotai 10’ and the U.S.–bred standard cultivar Chandler were included in the trial as reference cultivars. All observed trees were grafted on Juglans
Abstract
A method is described for the rapid determination of percent water in walnut seed by use of near-infrared spectrophotometry.
characteristics, attractive appearance, and low yield, this variety can be planted in hobby gardens and landscapes. Origin The Carpathian Basin, where Hungary is located, is rich in Persian walnut ( Juglans regia L.) genotypes, which ensure an excellent
Persian walnut ( Juglans regia L.) is the second-most important nut crop grown in Iran. The number of walnut trees in that country is estimated to be more than 20 million, mostly seedlings, distributed on borders of farms and orchards or expanded
injury ( Stergios and Howell, 1973 ). Freeze injury in trees often results from freezing temperatures in fall or after budbreak in the spring ( Rodrigo, 2000 ). Walnut ( Juglans regia L.) is grown in many regions that are susceptible to freezes that can
Persian walnut ( Juglans regia L.) is widely cultivated for nut and wood production ( McGranahan and Leslie, 2012 ). Originally cultivated on Persia’s plateau, it has been introduced worldwide ( Bernard et al. 2018a ). In addition to morpho
Walnuts ( Juglans regia ) contain high amounts of the essential omega-3 fat, α-linolenic acid, and a ratio of linoleic acid to α-linolenic acid that is ideal for decreasing cardiovascular risk ( Simopoulos, 2004 ). These polyunsaturated fatty
Abstract
Pistillate flowers from walnut trees having > 80% pistillate flower abscission (PFA) were examined from the time of anthesis until shortly before abscission. In addition to normally developing flowers, two types of abortive flowers were found. One abnormal flower type, seen in only two cases, lacked a developed embryo sac and had cellular degeneration in the nucellus. The second type of damaged flowers, which were more commonly observed, had apparently normal development of the nucelli and embryo sacs, but cell and tissue necrosis became evident beginning at the tip of the stigma, in the integuments, and throughout the placental evaginations. No cell or tissue damage was observed until after ovary growth in these flowers had stopped. We conclude that this second type of damage is associated with PFA.
two dominantly cultivated species, Juglans regia and Juglans sigillata ( Kuang and Lu, 1979 ). Juglans sigillata is found only in southwestern China ( Qu and Sun, 1990 ). Despite the significant global economic value of China's nut and wood
). Vulnerability curves (VCs) show the percentage loss of xylem conductivity (PLC, %) plotted vs. the xylem water potential. Measurements were conducted on ( A ) six cultivars of Juglans regia : Chandler (Ch, n = 15), Fernette (Ft, n = 13), Fernor (Fo, n