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Content archived on 2024-04-15

EFFECTS OF OZONE ON CHILLING AND FROST RESISTANCE IN PLANTS, ESPECIALLY WARM-CLIMATE CROPS AND SPRUCE

Objective

TO PROVIDE INFORMATION NEEDED TO ELUCIDATE THE MECHANISMS OF INTERACTIONS BETWEEN AIR POLLUTION AND ENVIRONMENTAL LIMITING FACTORS (LOW TEMPERATURES).

THE EFFECTS OF AIR POLLUTION ARE MODIFIED BY INTERACTION WITH OTHER FACTORS, BOTH BIOTIC AND ABIOTIC (COST WORKSHOP, COPENHAGEN 1986). IN MEMBER STATES WITH WARMER CLIMATES, OCCASIONAL FROSTS AND CHILLING ARE A SOURCE OF SERIOUS ECONOMIC LOSS BECAUSE THE CROPS ARE MORE SENSITIVE TO THESE STRESSES THAN CROPS OF COLD CLIMATES. SUCH CROPS ARE ALSO AN IMPORTANT RESOURCE FOR THE REST OF THE COMMUNITY. THE CLIMATE IS CONDUCTIVE TO THE FORMATION OF OZONE AND THERE IS NO DOUBT THIS POLLUTANT REACHES SIGNIFICANT LEVELS IN THOSE COUNTRIES. SEVERAL IMPORTANT CROPS ARE KNOWN TO BE SENSITIVE TO OZONE (EG TOMATO, CUCUMBER) BUT THERE APPEARS TO BE LITTLE WORK ON EUROPEAN VARIETIES, PARTICULARLY IN THE WARM-CLIMATE COUNTRIES. WE HAVE EXPERIMENTAL EVIDENCE (PAPER TO BE GIVEN AT COST WORKSHOP GOTHENBERG, OCTOBER 1986) THAT OZONE REDUCES THE CHILLING RESISTANCE OF PHASEOLUS VULGARIS.

THE PRINCIPAL OBJECTIVE OF THIS PROPOSAL IS TO DETERMINE THE EFFECTS OF OZONE ON WARM-CLIMATE CROPS AND ON THEIR CHILLING/FROST RESISTANCE. THIS WOULD INVOLVE COLLABORATION WITH DR. HOLEVAS OF THE BANAKI INSTITUTE, ATHENS. A SECONDARY, BUT NO LESS IMPORTANT, AIM IS TO PROMOTE COLLABORATION BETWEEN THE TWO ORGANISATIONS TO MAKE MUTUAL USE OF THEIR EXPERTISE.
THE PROPOSED PROJECT WOULD ALSO EXTEND WORK IN PROGRESS ON THE PHYSIOLOGICAL EFFECTS OF OZONE ON WINTER HARDINESS OF SPRUCE CLONES (BAVARIA STOCK). THIS CURRENT WORK WILL CONTINUE AND, IN MAY 1987, AN OPEN-FIELD FUMIGATION SYSTEM WILL BE CONSTRUCTED AND THE CLONES FUMIGATED WITH OZONE FROM JUNE UNTIL SEPTEMBER EACH YEAR. THE EXPERIMENT WILL CONTINUE UNTILL 1989 IN ORDER TO OBSERVE THE EFFECTS OF PROLONGED, REPEATED EXPOSURE TO OZONE AND WINTER. THE CONDITION OF THE TREES WILL BE RECORDED IN VARIOUS WAYS THROUGHOUT THE EXPERIMENTAL PERIOD.
COLLABORATION WITH DRS. PAYER AND BLANK OF GSF, MUNICH, IS FORESEEN.

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Coordinator

UNIVERSITY OF NEWCASTLE UPON TYNE
EU contribution
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Address

NE1 7RU Newcastle upon Tyne
United Kingdom

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