Wintering forms of perennial herbs in the cool temperate regions of Japan
Wintering forms of perennial herbs in the cool temperate regions of Japan
复制标题
日本寒温带地区多年生草本植物的越冬形态
作者：
F. Yoshie;S. Yoshida
对日本冷温带地区42种多年生草本植物的越冬形式进行了调查。根据在24 °C下开始生长所需的天数，可以识别出三种类型的休眠：非休眠（300天）。 非休眠的草本植物在强制休眠下越冬，如二年生植物。浅休眠的草本植物需要更大的天数生长开始随着孵化温度的降低，从而可以避免非季节性的秋季发芽。深休眠的草本植物在较宽的温度范围内需要最多的天数来开始生长，并且它们在不利的季节很少发芽。根据幼叶鳞片的分化程度，可将冬芽分为3种类型：无鳞片分化芽、部分鳞片分化芽和完全鳞片分化芽。具有完全分化鳞片的草本植物。
Wintering forms of 42 perennial herbaceous species were investigated in the cool temperate regions of Japan. Three types of dormancy were recognized based on the number of days required for growth initiation at 24 °C: nondormant ( 300 days). The nondormant herbs overwinter under an imposed dormancy, as in biennials. The shallow-dormant herbs required a greater number of days for growth initiation as incubation temperature decreased and thereby could avoid unseasonal autumn sprouting. The deep-dormant herbs required the greatest number of days for growth initiation under a wide range of temperatures, and they seldom sprout new shoots during the unfavorable season. Three types of winter buds were recognized based on the degree of differentiation of scales from young foliage leaves: buds with no differentiated scales, buds with partially differentiated scales, and buds with perfectly differentiated scales. The herbs with perfectly differentiated sca...