Thaw effects on cold-hardiness parameters in yellow birch
Thaw effects on cold-hardiness parameters in yellow birch
复制标题
解冻对黄桦抗寒参数的影响
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
P. Arp
中科院分区：
文献类型：
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作者：
X. B. Zhu;R. Cox;C. P. Bourque;P. Arp
一年生，冷硬化，容器生长的黄桦树（Betula alleghaniensis布里特。）在用模拟冬季解冻预处理之后，将幼苗暴露于冷处理。根和芽的冻害通过相对电解质渗漏和氯化三苯基四氮唑还原来评估。在温室条件下60天后还测定了生长特性。相对电解质渗漏和三苯基四氮唑氯化物还原测量表明，根越来越受到损害，降低冷处理温度。然而，植物解冻预处理表现出显着较低的茎增量，芽长，叶面积比unthawed植物响应低温。这些生长参数的变化也显着相关的根和地上部的冻害参数。不同解冻预处理下的抗寒性以造成显著伤害的最高冻结温度为指标进行评价。
One-year-old, cold-hardened, container-grown yellow birch (Betula alleghaniensis Britt.) seedlings were exposed to cold treatments after being pretreated with a simulated winter thaw. Freezing injury to roots and shoots was assessed by relative electrolyte leakage and triphenyltetrazolium chloride reduction. Growth characteristics were also determined after 60 days under greenhouse conditions. Relative electrolyte leakage and triphenyltetrazolium chloride reduction measurements showed that roots became increasingly damaged with decreasing cold-treatment temperatures. However, plants pretreated with thaws showed significantly lower stem increment, shoot length, and leaf area in response to the cold temperatures than did the unthawed plants. Variation in these growth parameters was also significantly correlated with both root and shoot freezing injury parameters. Cold hardiness under different thaw pretreatments was assessed using the highest freezing temperature that caused significant injury, referred to ...