Differential Declines in DNA of Aging Leaf Tissues |
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| Authors: | Harris, Joseph B. Schaefer, Verlyn G. Dhillon, Sukhraj S. Miksche, Jerome P. |
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| Affiliation: | 1Biology Department, University of Wisconsin-Stevens Point Stevens Point, WI 54481, U.S.A.
2Botany Department, North Carolina State University Raleigh, NC 27650, U.S.A. |
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| Abstract: | Leaves from tobacco and peanut were sampled for cytophotometricstudy from young to senescent stages. Differences in nucleibetween tissues developed during aging. Tobacco epidermal cellsshowed an average loss of approximately one-third of their DNAand peanut epidermis lost more than one-fourth. Mesophyll nuclearDNA declined more slowly than epidermal. These results implythat leaf aging may begin in the epidermis. (Received March 6, 1982; Accepted August 23, 1982) |
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