Temperature Step Response of Dehardening in Pinus sylvestris Seedlings

被引：26

作者：

Repo, Tapani ^{[1
]}

Pelkonen, Paavo ^{[2
]}

机构：

[1] Finnish Forest Res Inst, Suonenjoki Res Stn, SF-77600 Suonenjoki, Finland

[2] Univ Joensuu, Dept Forestry, SF-80101 Joensuu, Finland

来源：

SCANDINAVIAN JOURNAL OF FOREST RESEARCH | 1986年 / 1卷 / 1-4期

关键词：

Pinus; dehardening; frost resistance; impedance; time constant;

D O I：

10.1080/02827588609382418

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

The time constant of the dehardening of one-year-old Scots pine (Pinus sylvestris L.) seedlings was studied in three experiments started at different times of the year. The seedlings were transferred from outside to the different controlled conditions in January (Exp. 1), March (Exp. 2) and April (Exp. 3). Changes in the frost resistance of the seedlings were followed on the basis of the temperature response of the specific impedance difference in the shoot. The time constant for dehardening at a temperature of 7.5 degrees C was found to be about 12 days in Exp. 1, about 8 days in Exp. 2, and about 5 days in Exp. 3. the terminal bud burst when the frost resistance of the shoot had risen to about -10 degrees C.

引用

页码：271 / 284

页数：14