Influence of drought, high temperature, and carbamide cytokinin 4-PU-30 onphotosynthetic activity of plants. 2. Chloroplast ultrastructure of primary bean leaves
D. Stoyanova et I. Yordanov, Influence of drought, high temperature, and carbamide cytokinin 4-PU-30 onphotosynthetic activity of plants. 2. Chloroplast ultrastructure of primary bean leaves, PHOTOSYNTHE, 37(4), 1999, pp. 621-625
Ultrastructural changes in chloroplasts of primary leaves of 15-d-old bean
plants (Phaseolus vulgaris L, cv. Cheren Starozagorski) in response to a si
ngle stress (increasing water deficit, WD) as well as to combined stress (W
D piers high temperature, WD+HT) were investigated under the possible prote
ctive or reparatory effects of the carbamide cytokinin 4-PU-30 [N-(2-chloro
-4-pyridyl)-N-phenylurea] applied before or after the stress. Essential str
uctural changes in chloroplast ultrastructure occurred mainly in plants tha
t had experienced WD+HT: the thylakoids were swollen, the envelope was dest
royed, and the spatial orientation of inner membrane system was not typical
. Changed starch accumulation was also observed. 4-PU-30 protected chloropl
ast ultrastructure under WD+HT.