Alleviation of Lead Toxicity by 5-Aminolevulinic Acid Is Related to Elevated Growth, Photosynthesis, and Suppressed Ultrastructural Damages in Oilseed Rape
Table 2
Effects of treatments of 5-aminolevulinic acid (ALA) (mg L−1) and lead (Pb) (μM) on the root morphology of Brassica napus L.
ALA conc.
Pb conc.
Mean values and their relative increase/decrease over respective controls
Root diameter (cm)
Root surface area (cm2)
Root volume (cm3)
Number of root tips
0
0
(0)
(0)
(0)
(0)
100
(−16.86)
(−9.93)
(−10.26)
(−2.75)
400
(−47.56)
(−92.63)
(−40.28)
(−32.42)
25
0
(+8.53)
(+11.48)
(+2.74)
(+4.74)
100
(+24.93)
(+16.75)
(+30.91)
(+15.08)
400
(+83.72)
(+15.70)
(+40.15)
(+27.97)
Values are the means of four replications ± SD. Variants are significant at .
