It has been shown that a fungal elicitor chitosan (CHT) inhibits the blue lightinduced stomatal opening and can trigger stomatal closure. These movements are related to the H+-ATPase activity in the guard cell (GC) plasma membrane that affects the transport of osmotically active solutes. The ATP for proton pumping is supplied mostly from mitochondrial respiration; however, a partial inhibition by DCMU implies a role of GC photosynthetic electron transport in the ATP supply. In order to investigate whether CHT affects the photosynthetic ATP production of Vicia GCs, the light-dependence of the photosynthetic electron transport rate (ETR) of individual GCs was assayed. In addition, to test the possible effect of CHT on the activity of ion channels, GC protoplasts were investigated by patch clamp technique.
|Number of pages||4|
|Journal||Acta Biologica Szegediensis|
|Publication status||Published - Dec 15 2011|
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Agricultural and Biological Sciences(all)