Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Effects of arsenic on the net photosynthesis rate under different irradiances (A,B), pigments contents (C,D), and chlorophyll a fluorescence (E) in two contrasting tobacco genotypes (A,C) tolerant N.tabacum cv.Wisconsin; (B,D) sensitive N. sylvestris). 0, 10, and 30 µg l−1 arsenate concentrations. Bars indicate standard deviations. Stars mean statistically significant differences from control at the level α = 0.1 ((*)), 0.05(*), 0.01 (**) or 0.001(***), n = 5.
