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''Vitis amurensis'', the Amur grape, is a species of grape native to the Asian continent. Its name comes from the Amur Valley in Russia and China. It is very resistant to frost, but is not tolerant to drought. Selections vary, but as a species it has strong resistance to anthracnose and ripe rot, and moderately strong resistance to downy mildew and powdery mildew. == Distribution and ecology == ''Vitis amurensis'' is a relic of pre-glacial subtropical vegetation of the Far East, it reaches the continental latitude Lake Kizi (about fifty-first parallel). Along the coast of the Sea of Japan to the north it reaches the mouth of the Muli river, and the Amur region to the west - to the river Zeya. It grows in the forests of Manchuria, Amur Oblast, Primorsky Krai,North East China (Anhui, Hebei, Heilongjiang, Jilin, Liaoning, Shandong, Shanxi, Zhejiang), Japan (Honshu) and Korea. Amur grapes are classified into three subspecies: *''V. amurensis'' var. ''amurensis'' *''V. amurensis'' var. ''dissecta'' *''V. amurensis'' var. ''yanshanensis'' It is most common in the valleys of rivers and streams, in clearings, forest edges, forests, the lower and middle slopes of mountains, where they climb to trees and spread along the ground. It is the northernmost and most stable type of grape growing in the Far Eastern taiga. Most grapes species are found in much warmer climates. Only the Amur grape can tolerate winter temperatures down to −45 °C, and the root zone of the soil to −16 °C. Anthropogenic factors have adversely affected the number and status of the Amur grapes in their natural habitats, leading to a marked reduction in their range. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Vitis amurensis」の詳細全文を読む スポンサード リンク
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