The Effect of Dichlorophenyldimethylurea on Light‐Stimulated 22 Na + , 42 K + and 86 Rb + Absorption in Different Tissues of Phaseolus vulgaris Leaves
1975; Wiley; Volume: 35; Issue: 1 Linguagem: Inglês
10.1111/j.1399-3054.1975.tb03857.x
ISSN1399-3054
Autores Tópico(s)Radiation Therapy and Dosimetry
ResumoAbstract The light‐stimulated absorption of 86 Rb + by Phaseolus vulgaris L. leaf slices was found to be sensitive to dichlorophenyldimethylurea in air as well as in nitrogen, whereas light‐stimulated 22 Na + absorption in nitrogen was not sensitive to this inhibitor. The absorption of 22 Na + is not affected by light in air. The absorption of 42 K + is enhanced by a dichlorophenyldimethylurea‐insensitive light effect under anaerobic conditions and further increased by light in the absence of the inhibitor. Light‐enhanced 42 K + absorption in air was also inhibited by dichlorophenyldimethylurea. Previous work showed that light‐stimulated 86 Rb + and 42 K + absorption by Phaseolus vulgaris leaf slices is restricted to the guard cells. The present results are discussed with reference to the effect of light on stomatal opening.
Referência(s)