Black walnut ( Juglans nigra ) is considered one of the most valuable plants, with a global production 3.5 million tons dried fruit yearly. Throughout past two millennia, its allelopathic effects have been widely recognized. walnuts produce natural naphthoquinone called juglone, which occurs naturally in all parts tree, particularly green husk, and contributes significantly to black walnut. Exc...

Abstract The health and productivity of black walnut (Juglans nigra L.) is currently threatened by Thousand Cankers Disease (TCD), a pest complex comprised an insect vector, the twig beetle (WTB) (Pityophthorus juglandis Blackman) (Coleoptera: Curculionidae), associated pathogenic fungi (Geosmithia morbida Kolařík, Freeland, Utley, Tisserat) (Hypocreales: Bionectriaceae). There urgent need for ...

This paper is to give an outline of the tree biotechnology research in South Korea. Tree Breeding, we call Traditional Tree Breeding later compared to Tree Biotechnology, started in 1954 in South Korea. Tree Biotechnology Research started as Tissue culture in the late 1970 in South Korea. Micropropagation was the first field adopted. Embryo culture, Bud culture, Callus culture, Cell culture are...

Basal area is a key measure of forest stocking and an important proxy productivity in the face climate change. Black walnut ( Juglans nigra ) one most valuable timber species North America. However, little known about how black would change with differed bioclimatic conditions under In this study, we projected current future basal walnut. We trained different machine learning models using more ...

The article presents generalized scientific researches and experimental data on the bioecological peculiarities of North American species Juglans L. genus. seasonal rhythm development are revealed. cinerea L., J. rupestris Engelm. major (Torr.) A. Heller were first to wake up nigra californica S. Wats., hindsii (Jeps.) Jeps. ex R.E. Sm. a little later. biorhythm woody plants is closely related ...

An analysis of genetic structure and differentiation in cultivated walnut (Juglans regia) using 15 microsatellite loci revealed a considerable amount of genetic variation with a mild genetic structure indicating five genetic groups corresponding to the centers of diversity within the home range of walnut in Eurasia. Despite the narrow genetic differentiation among groups accounting for only 10 ...