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SHORT‐WAVE ULTRAVIOLET LIGHT CLOSES LEAF STOMATA
Author(s) -
Wright Lawrence A.,
Murphy Terence M.
Publication year - 1982
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1982.tb13364.x
Subject(s) - guard cell , biology , ultraviolet , ultraviolet light , botany , ultraviolet radiation , ultraviolet irradiation , irradiation , optics , photochemistry , physics , chemistry , nuclear physics , radiochemistry
The irradiation of detached tobacco leaves with short‐wave ultraviolet light (254 nm, 600 Jm ‐2 ) causes guard cells to lose potassium, and stomata to close, within 30 minutes. Stomatal closing has been correlated with an increased rate of senescence of detached oat leaves (Thimann and Satler, Proc. Natl. Acad. Sci. USA 76: 2295, 1979). Thus, closing of stomata may account for the acceleration of senescence that is induced by ultraviolet light.