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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Issue 53 (1962) → Physiological Changes in Stored Pine Seedlings

Physiological Changes in Stored Pine Seedlings

Physiological changes in Jeffrey pine seedlings, 1-1 stock, in storage at the Mt. Shasta Nursery were studied during the winter of 1957-58. Water content, enzyme activity, and food reserves in the form of starch were measured in stored and freshly lifted stock three times during the winter. The stored stock was lifted on October 24. Tests were conducted that day, 11 weeks later, and again 26 weeks after lifting. Fresh stock for comparison was lifted and tested each day a test was made on the stored stock. When laboratory tests were checked against field survival, the disappearance of starch in the stored seedlings appeared to be directly related to a decrease in field survival.3 Field survival was not correlated with water content of the needles, or with enzyme activity in the roots and stems of the stored seedlings.


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Author(s): Henry Hellmers

Publication: Tree Planters' Notes - Issue 53 (1962)