Fusarium graminearum is the most important species causing Fusarium head blight of small-grain cereals. Ascospore discharge from F. graminearum perithecia was studied under controlled conditions, i.e., between 5 and 40 °C in a saturated atmosphere and between 44.5 and 100 % relative humidity at 20 °C. Ascospores were collected on microscope slides placed directly below maize stalk plugs bearing mature perithecia, and were enumerated daily for 5 days. Discharge was detected at all temperatures and relative humidities on the first day; no discharge was detected for temperatures >30 °C or relative humidities ≤76% after the first day. Ascospore discharge was highest between 15 and 25 °C (optimum at 21 °C) and at 100 % relative humidity. Some ascospores were discharged at any of the tested temperatures and relative humidities. A Bete equation described ascospore discharge as a function of temperature (R2 = 0.99), and an exponential equation described ascospore discharge as a function of relative humidity (R2 = 0.97).

Manstretta, V., Rossi, V., Ascospore discharge by Fusarium graminearum as affected by temperature and relative humidity, <<EUROPEAN JOURNAL OF PLANT PATHOLOGY>>, 2016; 146 (1): 191-197. [doi:10.1007/s10658-016-0892-z] [http://hdl.handle.net/10807/85625]

Ascospore discharge by Fusarium graminearum as affected by temperature and relative humidity

Manstretta, Valentina
Primo
;
Rossi, Vittorio
Ultimo
2016

Abstract

Fusarium graminearum is the most important species causing Fusarium head blight of small-grain cereals. Ascospore discharge from F. graminearum perithecia was studied under controlled conditions, i.e., between 5 and 40 °C in a saturated atmosphere and between 44.5 and 100 % relative humidity at 20 °C. Ascospores were collected on microscope slides placed directly below maize stalk plugs bearing mature perithecia, and were enumerated daily for 5 days. Discharge was detected at all temperatures and relative humidities on the first day; no discharge was detected for temperatures >30 °C or relative humidities ≤76% after the first day. Ascospore discharge was highest between 15 and 25 °C (optimum at 21 °C) and at 100 % relative humidity. Some ascospores were discharged at any of the tested temperatures and relative humidities. A Bete equation described ascospore discharge as a function of temperature (R2 = 0.99), and an exponential equation described ascospore discharge as a function of relative humidity (R2 = 0.97).
Inglese
Manstretta, V., Rossi, V., Ascospore discharge by Fusarium graminearum as affected by temperature and relative humidity, <<EUROPEAN JOURNAL OF PLANT PATHOLOGY>>, 2016; 146 (1): 191-197. [doi:10.1007/s10658-016-0892-z] [http://hdl.handle.net/10807/85625]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10807/85625
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