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Acibenzolar-S-methyl and methyl jasmonate treatments of glasshouse-grown freesias suppress post-harvest petal specking caused by Botrytis cinerea
Darras, AI, Joyce, DC and Terry, LA (2006) Acibenzolar-S-methyl and methyl jasmonate treatments of glasshouse-grown freesias suppress post-harvest petal specking caused by Botrytis cinerea. Journal of Horticultural Science & Biotechnology, 81 6: 1043-1051.
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| Author(s) |
Darras, AI
Joyce, DC
Terry, LA
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| Title |
Acibenzolar-S-methyl and methyl jasmonate treatments of glasshouse-grown freesias suppress post-harvest petal specking caused by Botrytis cinerea
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| Journal name |
Journal of Horticultural Science & Biotechnology
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| Publication date |
2006
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| Volume number |
81
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| Issue number |
6
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| ISBN |
1462-0316
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| ISSN |
1462-0316
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| Start page |
1043
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| End page |
1051
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| Total pages |
9
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| Editor(s) |
T.M.A. Wilson
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| Place of publication |
Ashford
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| Publisher |
Headley Brothers Ltd
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| Collection year |
2006
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| Subject |
C1
300304 Post Harvest Technologies
620299 Horticultural crops not elsewhere classified
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| Abstract |
Compounds that activate host plant defence responses potentially offer socio-environmentally sound alternative methods for disease control. In a series of glasshouse trials over 2 years, pre-harvest sprays with acibenzolar-S-methyl (ASM) and methyl jasmonate (MeJA) were tested for suppression of post-harvest infection of cut Freesia hybrida L. flowers by Botrytis cinerea. For the ASM treatments, variability in reducing the incidence of B. cinerea disease was observed between years freesia varieties, incubation temperatures and ASM concentrations. In the first year, the greatest reductions in lesion numbers on ASM-treated var. 'Cote d'Azur' were recorded using 2.86 mM ASM. For three different post-harvest temperature regimes, the relative reductions in lesion numbers, compared to untreated controls, were 45% at 5 degrees C, 40% at 12 degrees C and 30% at 20 degrees C, respectively. In the second year, lesion numbers were most reduced using 1.43 mM ASM to treat freesia var. 'Dukaat' flowers. Here, the relative reductions were to 44% at 5 degrees C, 26% at 12 degrees C and 51% at 20 degrees C. MeJA treatments were, in general, more consistently effective than ASM treatments in reducing lesion numbers and lesion diameters on cut freesia flowers. MeJA-treated (0.2 mM) freesia flowers (var. 'Dukaat') incubated at 20 degrees C showed relative reductions of 62%, and 45% for lesion number and lesion diameter, respectively. The differing efficacy between ASM and MeJA treatments could be attributed to their differential abilities to induce the salicylic acid (SA)-mediated vs. the jasmonic acid (JA)-mediated host defence pathways, respectively.
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| Keyword(s) |
Pre-harvest Sprays
Disease
Control
Infection
Induction
Acid
Protection
Horticulture
Systemic Acquired-resistance
Disease Resistance
Tomato Plants
Rose Flowers
Arabidopsis
Benzothiadiazole
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