UV-C induces K sup + efflux from bean but not from oat leaves
- Miami Univ., Oxford, OH (USA)
Previous reports have shown that ultraviolet radiation (UV) induces a specific leakage of K{sup +} from cells in culture as well as from guard cells of bean leaves resulting in stomatal closure. In an effort to determine how general this response may be in photosynthetic leaf cells, we measured the UV-C-induced K{sup +} efflux from irradiated 10-14 day-old bean and oat leaf sections. Our results show that oat leaves do not respond to UV-C irradiation with K{sup +} efflux. However UV-C irradiated bean leaves leaked K{sup +} at a rate of approximately 47 nmoles cm{sup {minus}2} h{sup {minus}1} and the leakage was linear for at least 3.5 hours. The source cells for K{sup +} efflux and the possible mechanisms responsible for this difference in UV-sensitivity will be discussed.
- OSTI ID:
- 5645028
- Report Number(s):
- CONF-9007196-; CODEN: PPYSA
- Journal Information:
- Plant Physiology, Supplement; (USA), Vol. 93:1; Conference: Annual meeting of the American Society of Plant Physiologists, Indianapolis, IN (USA), 29 Jul - 2 Aug 1990; ISSN 0079-2241
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
OATS
BIOLOGICAL RADIATION EFFECTS
POTASSIUM
MEMBRANE TRANSPORT
LEAVES
PHASEOLUS
ULTRAVIOLET RADIATION
ALKALI METALS
BIOLOGICAL EFFECTS
CEREALS
ELECTROMAGNETIC RADIATION
ELEMENTS
GRAMINEAE
LEGUMINOSAE
LILIOPSIDA
MAGNOLIOPHYTA
MAGNOLIOPSIDA
METALS
PLANTS
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