3.3 Photosynthetic pigments content
Treatment with redroot pigweed leachate significantly affected
photosynthetic pigment concentrations of cucumber and wheat plants
(Table 4). In cucumber plant, chlorophyll b, total chlorophyll, total
carotenoid, and β-caroten increased and chlorophyll a to b ratio and
lutein content decreased, which was statistically significant (p
≥ 0.01). In wheat plant, chlorophyll a was significantly decreased by
amaranth leachate, which resulted in a significant decrease in total
chlorophyll and chlorophyll a to b ratio (p ≥ 0.01). Total
carotenoid in wheat was not affected utterly by applied concentrations
of leachate, however, β-caroten content was significantly decreased
(p ≥ 0.01).