3.4.1 Fresh biomass and total chlorophyll content
Single
root exposure of CLO (10 mg L-1), DFN (20 mg
L-1) and DFZ (10
mg L-1) significantly affected the fresh biomass of
plants and total chlorophyll content (Fig. 4 A and B ).
Compared with the controls, for CLO, DFN and DFZ, the values of fresh
biomass of plants decreased by 15.4 %, 24.5 % and 53.8% after single
root exposure, respectively (Fig. 4 A ); the values of
total chlorophyll content decreased by 26.2 %, 28 %, 31 %,
respectively (Fig. 4 B ). As shown in Fig. 4 Aand B , among the treatments with SA
supplementation, the fresh biomass of plants
increased compared with the without SA treatments. With SA
supplementation at 1mg L-1, the fresh biomass of
plants increased by 25.5 %, 1.18 %, 66.7 % compared to the single
root exposure of CLO, DFN and DFZ treatments, respectively. With SA
supplementation at 10 mg L-1, the fresh biomass of
plants significantly increased by 33.8 %, 18.9 %, 74.6 % compared to
the single root exposure of CLO, DFN and DFZ treatments, respectively.
(Fig. 4 A ). Similarly, compared with the treatments
with CLO, DFN or DFZ alone, SA at 1mg L-1 and 10 mg
L-1 significantly improved the total chlorophyll
content, which increased by 47. 1%, 124 %, 144 % and 41.1 %, 150 %,
113 % (Fig. 4 B ).