Total epidermal cell walls of pea stems respond differently to auxin than does the outer epidermal wall alone
✍ Scribed by M. Syndonia Bret-Harte
- Book ID
- 104659431
- Publisher
- Springer-Verlag
- Year
- 1993
- Tongue
- English
- Weight
- 886 KB
- Volume
- 190
- Category
- Article
- ISSN
- 0032-0935
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✦ Synopsis
The effect of auxin on cell wall mass in the epidermis of third internodes of Pisum sativum L. cv. Alaska grown in dim red light was investigated using epidermal peels, to determine whether epidermal peels reflect the behavior of the outer epidermal cell wall. In contrast to the outer epidermal wall itself, where auxin caused thinning in proportion to growth (M.S. Bret-Harte et al., 1991, Planta 185, 462~471), auxin promoted an increase in wall mass in epidermal peels from treated internode segments in the absence of exogenously supplied sugar. The percentage gain in mass was smaller than the percentage elongation, however, so mass per unit length decreased in peels from auxin-treated segments. Epidermal peels from auxin-treated segments gained more wall mass than control peels even when adhering internal tissue at the basal end of the peel was removed. Epidermal peels also had a gross composition different from that of the outer wall alone (M.