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Nogues S, Allen DJ, Morison JI, et al. Characterization of stomatal closure caused by ultraviolet-B radiation. Plant Physiol. 1999;121(2):489-96doi: 10.1104/pp.121.2.489.
Nogues, S., Allen, D. J., Morison, J. I., & Baker, N. R. (1999). Characterization of stomatal closure caused by ultraviolet-B radiation. Plant physiology, 121(2), 489-96. https://doi.org/10.1104/pp.121.2.489
Nogues, et al. "Characterization of stomatal closure caused by ultraviolet-B radiation." Plant physiology vol. 121,2 (1999): 489-96. doi: https://doi.org/10.1104/pp.121.2.489
Nogues S, Allen DJ, Morison JI, Baker NR. Characterization of stomatal closure caused by ultraviolet-B radiation. Plant Physiol. 1999 Oct;121(2):489-96. doi: 10.1104/pp.121.2.489. PMID: 10517840; PMCID: PMC59411.
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Plant Physiol. 1999 Oct;121(2):489-96. doi: 10.1104/pp.121.2.489.

Characterization of stomatal closure caused by ultraviolet-B radiation.

Plant physiology

Nogues, Allen, Morison, Baker

Affiliations

  1. Department of Biological Sciences, University of Essex, Colchester CO4 3SQ, United Kingdom.

PMID: 10517840 PMCID: PMC59411 DOI: 10.1104/pp.121.2.489

Abstract

The effects of ultraviolet-B (UV-B) radiation on stomatal conductance (g(s)) in pea (Pisum sativum L.), commelina (Commelina communis L.), and oilseed rape (Brassica napus L.) plants were investigated. Plants were grown in a greenhouse either with three different high ratios of UV-B to photosynthetically active radiation or with no UV-B radiation. Pea plants grown in the highest UV-B radiation (0.63 W m(-2)) exhibited a substantial decrease of adaxial and abaxial g(s) (approximately 80% and 40%, respectively). With growth in 0.30 W m(-2) of UV-B adaxial g(s) was decreased by 23%, with no effect on abaxial g(s), and lower UV-B irradiance of 0.21 W m(-2) had no effect on either surface. Although abaxial g(s) increased when leaves were turned over in control plants, it did not in plants grown with the highest UV-B. Adaxial g(s) in commelina and oilseed rape also decreased on exposure to high UV-B (0.63 W m(-2)). For previously unexposed pea plants the time course of the effect of UV-B on g(s) was slow, with a lag of approximately 4 h, and a time constant of approximately 3 h. We conclude that there is a direct effect of UV-B on stomata in addition to that caused by changes in mesophyll photosynthesis.

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