Premium
Effect of ultraviolet radiation on accumulation and leakage of 86 Rb + in guard cells of Vicia faba
Author(s) -
Negash Legesse,
Jensén Paul,
Björn Lars Olof
Publication year - 1987
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1987.tb04276.x
Subject(s) - guard cell , vicia faba , ultraviolet , irradiation , ultraviolet light , chemistry , nuclear chemistry , fluorescence , radiochemistry , ultraviolet radiation , analytical chemistry (journal) , biophysics , photochemistry , horticulture , biology , biochemistry , chromatography , physics , optics , nuclear physics
The effects of UV‐C (254 nm), UV‐A (365 nm) and broad‐band UV (280–380 nm) on guard cells of Vicia faba L. cv. Long Pod were investigated in the presence of white light (450 μmol m −2 s −1 ). UV‐C (7 μmol m −2 s −1 ) was found to cause leakage of 86 Rb + from guard cells, while UV‐A (0.3 μmol m −2 s −1 ) stimulated increased uptake in these cells. A relatively small stimulatory effect was observed by broad‐band UV (3 μmol m −2 s −1 ) during the first 30 min of irradiation with an apparent equilibration of influx and efflux thereafter. Leakage of 86 Rb + from guard cells continued despite the removal of UV‐C and an increase in the amount of white light from 450 to 1500 μmol m −2 s −1 , suggesting that membranes were irreversibly damaged. Irradiation of guard cells with UV‐C for 30, 45 and 90 min indicated that these cells began to be affected already by 30 min UV‐C irradiation.