Histological comparisons of white pine [Pinus strobus] needles fumigated with ozone and sulfur dioxide singly and in mixtures

Needles of Pinus strobus were fumigated with low concentrations of ozone and sulfur dioxide singly and in mixtures for time periods of less than one hour. The needles were killed and fixed immediately after fumigation, cross sections 15 microns thick were cut and then stained in a Safranin O-Fast Gr...

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Bibliographic Details
Published in:Proceedings of the Pennsylvania Academy of Science 1980, Vol.54 (2), p.128-130
Main Author: BOONE, GEORGE C.
Format: Article
Language:English
Subjects:
BIOLOGY
Cell walls
Chloroplasts
Cytoplasm
Endodermis
Fumigation
Histology
Mesophyll cells
Observational research
Ozone
Sulfur dioxide
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Summary:Needles of Pinus strobus were fumigated with low concentrations of ozone and sulfur dioxide singly and in mixtures for time periods of less than one hour. The needles were killed and fixed immediately after fumigation, cross sections 15 microns thick were cut and then stained in a Safranin O-Fast Green stain series. The data revealed that ozone appeared to have a greater initial effect than sulfur dioxide on the tissues of the needles. The sections cut from needles fumigated with sulfur dioxide were similar in appearance to the tissues from nonfumigated control needles. The injury observed in sections of needles fumigated with a mixture of ozone and sulfur dioxide was characteristic of injury caused by ozone rather than sulfur dioxide. Data indicated that fumigations by low concentrations of ozone for a time period of less than one hour could cause changes in the tissues that would be injurious to the normal activities of the needles.
ISSN:0096-9222
2573-9964