Potassium Involvement in Stomatal Movements ofPaphiopedilum
- 1 May 1983
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Experimental Botany
- Vol. 34 (5) , 507-513
- https://doi.org/10.1093/jxb/34.5.507
Abstract
There are conflicting reports about whether guard cells of Paphiopedilum spp. accumulate K during stomatal opening. In this study X-ray microprobe analysis and histochemical staining for K indicated that K accumulated in guard cells in leaves of Paphiopedilum spp. when stomata opened. Additionally, stomatal opening in epidermal strips of P. harrisseanum could only be induced in an MES buffered KC1 medium. Element analysis ofP. harrisseanum epidermis also indicated substantial levels of K, Na and Ca within the tissue. We conclude that K is involved in the stomatal movements of Paphiopedilum.Keywords
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