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Monoterpene Content of Healthy Sand Pine and Sand Pine with Root Disease

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Abstract:

Graft combinations with slash pine (Pinus elliottii Engelm.) alone and with sand pine (P. clausa var. immuginata D. B. Ward, Choctawhatchee sand pine) were studied to determine if monoterpene content of rootstocks of healthy and diseased grafts is related to susceptibility to root infection. The amount and composition of monoterpenes in branches, scions, rootstocks (stem of the rootstock) and roots were determined for the following graft (scion/rootstock) combinations: healthy and diseased sand/sand, sand/slash, and healthy slash/slash grafts. Buds from the same grafts were analysed for monoterpene composition only. Similar analyses were made of xylem tissue at dbh of healthy and diseased Choctawhatchee and Ocala sand pines (P. clausa var. clausa [Chapm.] Vasey) growing in natural stands. In seed orchard samples, the quantity of monoterpenes was higher in roots and rootstocks of diseased grafts than of healthy grafts. However, monoterpene composition in healthy and diseased grafts was similar within the sand/sand grafts and within the sand/slash grafts. No consistent differences in monoterpene composition were found between these two graft combinations, There was a significantly lower amount of -phellandrene and a higher amount of -pinene in roots and rootstocks of healthy and diseased sand/slash grafts as compared to healthy slash/slash grafts. The roots and rootstocks of slash/slash grafts were not infected by the root disease that is affecting sand pine. Of the trees sampled, sand and slash grafts with low -phellandrene content in the roots and rootstocks were susceptible to root infection. Slash pine grafts with high -phellandrene were not infected. In stem xylem samples from natural stands, no monoterpene differences were detected between healthy and diseased Ocala sand pine. Between varieties, the amounts of several monoterpenes found in both Choctawhatchee and Ocala sand pines differed very little and inconsistently. Forest Sci. 29:791-797.

Keywords: Graft; rootstock; scion; slash pine; turpentine; α-pinene; -pinene

Document Type: Journal Article

Affiliations: Florida Department of Agriculture and Consumer Services, Division of Forestry and Plant Industry, Gainesville, FL 32602

Publication date: 1983-12-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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