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.


Author Darras, AI
Joyce, DC
Terry, LA
Title Acibenzolar-S-methyl and methyl jasmonate treatments of glasshouse-grown freesias suppress post-harvest petal specking caused by Botrytis cinerea
Journal name Journal of Horticultural Science & Biotechnology   Check publisher's open access policy
ISSN 1462-0316
Publication date 2006
Sub-type Article (original research)
Volume 81
Issue 6
Start page 1043
End page 1051
Total pages 9
Editor T.M.A. Wilson
Place of publication Ashford
Publisher Headley Brothers Ltd
Collection year 2006
Language eng
Subject C1
300304 Post Harvest Technologies
620299 Horticultural crops not elsewhere classified
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.
Keyword Pre-harvest Sprays
Disease
Control
Infection
Induction
Acid
Protection
Horticulture
Systemic Acquired-resistance
Disease Resistance
Tomato Plants
Rose Flowers
Arabidopsis
Benzothiadiazole
Q-Index Code C1

 
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