Abstract:
The pigment composition and morphology of photosynthetic apparatus in chlorophyll-deficient
plants of viridis and xantha types in comparison with green plant is studied. The plants at the
stage of 8-10 true leaves of linseed variety Tsian and M-80 (viridis) and M-81 (xantha)
chlorophyll-deficient mutant lines obtained through induced mutagenesis on its basis were used
as a material. The plants were grown in the field conditions of the Steppe zone of Ukraine. The
leaves of viridis chlorophyll-deficient mutant had a decrease in the amount of chlorophyll a and
catastrophic shortage - chlorophyll b. However these mutant plants produced the amount of
carotenoids at the level of control green plant. The morphology of their chloroplasts had no any
differences as well. Xantha chlorophyll-deficient mutant was characterized by a significant
decrease in amount of all the test pigments compared to the control. It also had a change in the
shape of chloroplasts which affected their linear dimensions and derivates-volume. A different
mechanisms of adaptation in the mutants with different type of chlorophyll deficiency are
considered. | 