Which grass group is generally more tolerant of atmospheric pollution?

Which grass group is generally more tolerant of atmospheric pollution?

• A. Cool-season
• B. Warm-season
• C. Both equally
• D. Neither

Answer: (A)

Atmospheric pollutants stress leaves by generating reactive oxygen species, and a grass’s ability to cope hinges on its antioxidant defenses, ability to limit pollutant uptake, and capacity to repair damaged photosynthetic systems. Cool-season grasses, being well adapted to temperate climates with variable air quality, typically show stronger antioxidant defenses and quicker recovery from ozone-like leaf injuries than warm-season grasses. That combination helps them maintain function and appearance under polluted conditions, so they’re generally more tolerant in environments where air quality varies. Remember, there’s variation among species and sites, but the overall pattern points to cool-season types handling atmospheric pollution better than warm-season ones.

Atmospheric pollutants stress leaves by generating reactive oxygen species, and a grass’s ability to cope hinges on its antioxidant defenses, ability to limit pollutant uptake, and capacity to repair damaged photosynthetic systems. Cool-season grasses, being well adapted to temperate climates with variable air quality, typically show stronger antioxidant defenses and quicker recovery from ozone-like leaf injuries than warm-season grasses. That combination helps them maintain function and appearance under polluted conditions, so they’re generally more tolerant in environments where air quality varies. Remember, there’s variation among species and sites, but the overall pattern points to cool-season types handling atmospheric pollution better than warm-season ones.