these habitats sometimes also contain sulfide.
While anaerobic fermentation is necessary for life in anaerobic
sediments
vulnerability of ADH to sulfide could lead to a broad-spectrum
sensitivity to environmental sulfide. If sulfide toxicity inhibits aerobic
and anaerobic respiration, plants will not survive. Higher
concentrations of sulfide were needed to poison ADH in intact roots
compared to extracts in
the present study. This indicates plants are effective at excluding
sulfide, a likely mechanism for tolerating sulfide in the environment
. The role of exclusion in sulfide tolerance
has been investigated in some systems
, but how this might differ between species largely remains
an area for future research. However, the greater sensitivity
of CytOx to sulfide suggests tolerance for sulfide in the environment
might come from protecting it from sulfide exposure
.