Misery for hay fever sufferers as pollen levels to treble

Hay fever sufferers could reach new heights of misery over the next century as pollen levels soar, new research suggest.

Scientists predict that higher levels of carbon dioxide (CO2) in the atmosphere will lead to a significant boost in the amount of air-borne grass pollen.

Despite increases in ozone, which suppresses plant growth, pollen production is expected to more than treble in the next 100 years.

US lead scientist Dr Christine Rogers, from the University of Massachusetts at Amherst, said: “The implications of increasing CO2 for human health are clear. Stimulation of grass pollen production by elevated CO2 will increase airborne concentrations and increase exposure and suffering in grass pollen-allergic individuals.”

For the study, grass plants grown in special reactor chambers were exposed to different atmospheric gas concentrations.

Different ratios of carbon dioxide and ozone were tested to show their effects on grass and pollen production.

The scientists found that an atmospheric CO2 concentrations of 800 parts per million — possible by the end of the century according to some forecasts — raised pollen production per grass flower by 53%.

Greater plant growth stimulated by the elevated CO2 further increased pollen levels, resulting in an overall boost of up to 202%.

This was despite the dampening effect of higher ozone levels.

The researchers, whose findings are reported in the online journal Public Library of Science ONE, focused on Timothy grass, a major cause of hay fever.

Dr Rogers added: “This is the first evidence that pollen production is significantly stimulated by elevated carbon dioxide in a grass species and has worldwide implications due to the ubiquitous presence of grasses in all biomes (vegetation habitats) and high prevalence of grass pollen allergy.

“These results are similar to our other studies performed in other highly allergenic taxa such as ragweed but with more extreme outcomes and wider impacts.”


Lifestyle

I had to turn off Dublin Murders with 15 minutes to go. We were watching the first episode because I had to review it the following day for the Today Show on RTÉ.Learner Dad: 'I like to see myself as relaxed but I’m obviously bottling up a fair few anxieties'

Purchasing a thatched cottage was a decision that would change Liam Broderick’s life. Kya deLongchamps meets the long-time thatcherMade in Munster: Meet Cork thatcher Liam Broderick

We take a trip back through the Wolves singer’s most major fashion moments.As Selena Gomez surprises fans with new music, these are some of her best style moments

Sue Rynhart sings at the Green Room in Cork Opera House on Saturday as part of Guinnness Cork Jazz Festival. She is from Dublin and is the mother of three boys.A Question of Taste with Sue Rynhart

More From The Irish Examiner