Institute of Natural Sciences, Senshu University, Tama-ku, Kawasaki, Japan.
J Plant Res. 2010 Sep;123(5):675-88. doi: 10.1007/s10265-010-0320-y. Epub 2010 Mar 4.
The vegetative phenology of 29 alpine species, including herbaceous and woody summergreens and evergreens, was investigated. Summergreen species initiated and completed leaf growth earlier than evergreen species. The green period of leaves in summergreen plants was determined largely by the time of growth initiation. Early initiation of growth in summergreen plants contributes to the increase in photosynthetic carbon gain. Early cessation of growth in summergreens is advantageous for the growth in the following year because it leads to an increase in stored photosynthates. The growth period of leaves and stems in alpine plants correlated with the time of growth initiation more strongly than with the time of growth cessation, indicating the importance of early growth initiation for the increase in plant growth. The growth period of leaves was positively correlated with the sum of leaf lengths and the number of leaves. Herbs with a long growth period of more than 50 days had perennial shoot axes not terminated by inflorescences, suggesting a relationship between the growth period and shoot habit. Two summergreen species were completely dead by mid-September, before the air temperature decreased below 0 degrees C. The remaining summergreen species died immediately after the air temperature decreased to -1.4 degrees C in late September.
对 29 种高山物种（包括草本和木本夏季绿叶植物和常绿植物）的营养物候进行了研究。夏季绿叶植物的叶片生长开始和完成时间早于常绿植物。夏季绿叶植物叶片的绿色期主要取决于生长开始的时间。夏季绿叶植物生长的早期开始有助于增加光合作用碳的获取。夏季绿叶植物的生长早期结束有利于次年的生长，因为这会导致储存的光合产物增加。高山植物的叶片和茎的生长期与生长开始的时间相关性强于与生长结束的时间相关性，这表明早期生长开始对植物生长的增加很重要。叶片的生长期与叶片长度总和和叶片数量呈正相关。生长期超过 50 天的草本植物具有多年生的茎轴，没有花序终止，这表明生长期与茎习性之间存在关系。到 9 月中旬，当空气温度降至 0 摄氏度以下时，有两种夏季绿叶植物完全死亡。在 9 月底空气温度降至-1.4 摄氏度后，其余的夏季绿叶植物立即死亡。
