New Zealand undersøgelse forudsiger pollen vil stige

New Zealand undersøgelse forudsiger pollen vil stige

A recent study predicts that Grass Pollen will soar in coming years. Desværre, this could mean much more suffering for people with hayfever, especially down under.

In a 2014 studere, researchers concluded 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 ĂĄr.

In the study, grass plants were grown in special reactor chambers and exposed to different atmospheric gas concentrations, with different ratios of carbon dioxide and ozone to show their effects on grass and pollen production.

The researchers focused on Timothy grass, which is a major cause of hay fever. Timothy grass extract is used in the oral lyophilisate Grazax, the immunotherapy tablet for hayfever.

They 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 procent.

Greater plant growth stimulated by the elevated CO2 further increased pollen levels, resulting in an overall boost of up to 202 procent. This was despite the dampening effect of higher ozone levels.

Dr Christine Rogers, the US lead scientist from the University of Massachusetts at Amherst said:

'Stimulering af græspollen produktion af forhøjet CO2 vil øge luftbårne koncentrationer og øge eksponeringen og lidelse i græs pollen-allergiske individer.

'Dette er det første bevis, at pollenproduktion signifikant stimuleret af forhøjet kuldioxid i græsarter og har verdensomspændende konsekvenser som følge af den allestedsnærværende tilstedeværelse af græsser i alle biomer (vegetation habitats) and high prevalence of grass pollen allergy.

"Disse resultater er magen til vores forsøg, der udføres i andre stærkt allergifremkaldende taxa såsom ambrosia, men med mere ekstreme udfald og bredere virkninger.«

The Research Article: Projected Carbon Dioxide to Increase Grass Pollen and Allergen Exposure Despite Higher Ozone Levels was published on 5th November 2014 in the online journal Public Library of Science ONE.

This article concluded:

'Taget sammen, our results strongly suggest significant increases in grass pollen production and allergen exposure under future predicted levels of CO2 and O3 af 165-202%.

"På grund af den udbredte eksistens af græsser og deres betydning i at fremkalde allergiske reaktioner, indikerer disse resultater vil der være en betydelig indvirkning på menneskers sundhed i hele verden som følge af fremtidige klimaændringer. "

Read the full article.