植物学报 ›› 2005, Vol. 22 ›› Issue (05): 560-565.

• 实验简报 • 上一篇    下一篇

草莓开花期发生霜害的温度

钟秀丽 王道龙 饶敏杰 何维勋 冯玉香   

  1. (中国农业科学院农业环境与可持续发展研究所 北京 100081)
  • 收稿日期:2004-11-02 修回日期:2005-06-30 出版日期:2005-10-30 发布日期:2005-10-30
  • 通讯作者: 钟秀丽

Tissue Temperature of Frost Injury in Strawberry During Anthesis

ZHONG Xiu-Li WANG Dao-Long RAO Min-Jie HE Wei-Xun FENG Yu-Xiang   

  1. (Institute of Agro-Environment and Sustainable Development, the Chinese Academy of Agricultural Sciences, Beijing 100081)
  • Received:2004-11-02 Revised:2005-06-30 Online:2005-10-30 Published:2005-10-30
  • Contact: ZHONG Xiu-Li

摘要: 用人工霜箱对草莓(Fragaria ananassa)叶片和花托进行模拟春霜实验。结果表明草莓叶片有忍耐胞间结冰的能力, 最低叶温-6.4 ℃以上, 结冰持续90分钟以内的叶片解冻后还能存活。花托不能忍耐胞间结冰, 是通过保持过冷却状态以回避结冰伤害。花托温度越低, 发生霜害的累积百分率越大, 半开花的花托温度降到-5.4 ℃时累计有50%发生结冰而造成霜害。盛开的花及鲜重大的花发生霜害的温度较高。

Abstract: Simulation tests of spring frost in strawberry (Fragaria ananassa) leaves and receptacles involved use of an artificial climate chamber. Leaves could tolerate intercellular freezing to some extent. At a tissue temperature of -6.4 ℃, leaves could survive 90-min freezing, but receptacles were not able to tolerate intercellular freezing. Receptacles resisted frost injury by maintaining a state of supercooling to avoid freezing. The proportion of receptacles injured was inversely related to decreased receptacle temperature, reaching 50% at -5.4 ℃. Full-blossom flowers and those with heavier fresh weight were susceptible to frost injury even at higher temperatures.