Transplanting shock in white spruce; effect of cold‐storage and root pruning on water relations and stomatal conditioning
Transplanting shock in white spruce; effect of cold‐storage and root pruning on water relations and stomatal conditioning
复制标题
白云杉移栽冲击；冷藏和根修剪对水分关系和气孔调节的影响
DOI：
10.1111/j.1399-3054.1983.tb00901.x
复制
发表时间：
1983
影响因子：
6.4
通讯作者：
T. Blake
中科院分区：
文献类型：
--
作者：
T. Blake
采用冷藏和剪根的方法对云杉[Piceae gluca(Motch)Voss]幼苗进行冷藏和修剪处理，研究了处理对移植后根系再生和气孔适应的影响。
在移栽前立即修剪休眠幼苗的根(0-75%的初始根面积)，无论是冷藏幼苗还是新鲜抬起的幼苗，都不会带来任何明显的生理优势。在种植后6周内，根部修剪对蒸腾速率和气孔阻力的影响不大，对干旱反应的影响也不大。
冷藏幼苗似乎能够更好地避免移栽休克和早期干旱，尽管根的生长延迟，这体现在a)新梢生长的延迟和b)气孔器的预调节，这减少了种植后和水分限制时的水分损失。春季新抬起的幼苗没有表现出这些适应性反应，它们的气孔在干旱后的种植后阶段对减少水分损失的适应能力很差。
White spruce [Piceae glauca(Moench) Voss] seedlings were pre-conditioned by cold storage and root pruning and a study was made of the effects of conditioning on root regeneration and stomatal adaptation following transplanting.
Root pruning (0 to 75% of the initial root area) of dormant seedlings immediately prior to transplanting did not confer any detectable physiological advantage in either cold-stored or freshly-lifted seedlings. Transpiration rates and stomatal resistance were not greatly affected by root pruning in the 6 week period after planting and root pruning did not greatly alter the response to drought.
Cold-stored seedlings appear better able to avoid transplanting shock and an early drought despite delayed root growth as evidenced by a) a delay in flushing of new shoot growth and b) pre-conditioning of the stomatal apparatus which reduced water loss after planting and when moisture was limiting. Seedlings freshly-lifted in the spring did not show these adaptive responses and their stomata were poorly adapted to reduce water loss in the post-planting period after a drought.