Potential of Methyl Jasmonate as a Harvest Aid for ‘Thompson Seedless’ Grapes: Concentration and Time Needed for Consistent Berry Loosening

González-Herranz, Raquel; Cathline, Kimberley A.; Fidelibus, Matthew W.; Burns, J. C.

doi:10.21273/hortsci.44.5.1330

Cited by 12 publications

(13 citation statements)

References 9 publications

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“…applications were effective in reducing FDF and inducing fruit abscission at a concentration of 10 mM and higher (Hartmond et al, 2000;Kender et al, 2001). Also, in grapes, MeJa was effective in inducing fruit drop at a concentration of 10 to 20 mM (Fidelibus et al, 2007), although lower rates of application (between 2 and 10 mM) were subsequently found to be better suited for mechanical harvesting applications (Gonzalez-Herranz et al, 2009). In blueberry, it may be expected that the fruit drop responses reported here would be reproducible under conditions of mechanical harvesting.…”

Section: Discussionmentioning

confidence: 96%

“…The application of MeJa, alone and in combination with other abscission agents, resulted in fruit abscission in sweet orange (Hartmond et al, 2000;Kender et al, 2001). Methyl jasmonate was also effective in reducing FDF and inducing fruit abscission in grapes (Fidelibus et al, 2007;Gonzalez-Herranz et al, 2009). Additionally, coronatine, a naturally produced compound with functional properties similar to the jasmonates, induced fruit abscission in citrus (Burns et al, 2003).…”

mentioning

confidence: 99%

“…Jasmonates have diverse roles in plant growth and development and in plant responses to biotic and abiotic stress (Wasternack, 2007). Methyl jasmonate has been evaluated as a potential abscission agent in several fruit crops (Burns et al, 2008;Fidelibus et al, 2007;Gonzalez-Herranz et al, 2009;Hartmond et al, 2000;Kender et al, 2001). The application of MeJa, alone and in combination with other abscission agents, resulted in fruit abscission in sweet orange (Hartmond et al, 2000;Kender et al, 2001).…”

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confidence: 99%

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Ethephon and Methyl Jasmonate Affect Fruit Detachment in Rabbiteye and Southern Highbush Blueberry

Malladi¹,

Vashisth²,

Johnson³

2012

horts

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Two abscission agents, ethephon and methyl jasmonate, were investigated in five studies to determine their potential for increasing fruit detachment during harvest in rabbiteye (Vaccinium ashei Reade) and southern highbush (hybrids based largely on Vaccinium corymbosum L. and Vaccinium darrowi Camp.) blueberry. In the first study with a rabbiteye blueberry genotype, T-451, ethephon applications up to 1000 mg·L−1 did not affect fruit drop but reduced fruit detachment force (FDF) by up to 21%. In the second study with two southern highbush blueberry genotypes, ethephon (up to 1500 mg·L−1) and methyl jasmonate (MeJa; up to 10 mm) applications resulted in significant fruit drop in ‘Star’ but neither of the growth regulators affected the fruit detachment characteristics of ‘Farthing’. In a third study with rabbiteye blueberry genotypes, MeJa applications of 10, 20, and 30 mm displayed an increasing linear trend in fruit drop in ‘Climax’ and linear and quadratic trends in fruit drop in ‘Powderblue’. In a fourth study with ‘Powderblue’, MeJa (20 mm) and ethephon (1000 mg·L−1) applications resulted in rapid and significant fruit drop. The fruit drop induced by MeJa in this study was attenuated by the coapplication of aminoethoxyvinylglycine (AVG), an ethylene biosynthesis inhibitor, suggesting that MeJa induced fruit detachment partly through its effects on ethylene biosynthesis. In another study with the southern highbush blueberry genotype, O’Neal, MeJa applications (20 mm) induced significant fruit drop but ethephon (1000 mg·L−1) applications did not affect fruit detachment. Overall, MeJa applications (20 mm or greater) generally induced rapid and extensive fruit abscission, often within 1 day after treatment. Applications of MeJa resulted in leaf yellowing and necrosis of leaf tips and margins, especially at high rates of application (20 mm or greater). Ethephon applications resulted in the abscission of mature and immature berries. Both ethephon and MeJa applications resulted in the detachment of the pedicel along with the fruit. Together, these data suggest that although ethephon and MeJa have the potential to be used as harvest aids in blueberry, the rates of application require further optimization to minimize potential phytotoxicity. Additionally, effective de-stemming of the berries may be essential if these compounds are to be used as harvest aids.

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Section: Discussionmentioning

confidence: 96%

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confidence: 99%

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confidence: 99%

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Ethephon and Methyl Jasmonate Affect Fruit Detachment in Rabbiteye and Southern Highbush Blueberry

Malladi¹,

Vashisth²,

Johnson³

2012

horts

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“…Methyl jasmonate might be a useful abscission agent in citrus , but its efficacy seems to be lower than ethylene releasing compounds as ethephon in other plants (BURNS et al, 2008). FIDELIBUS et al (2007) and GONZÁLEZ-HERRÁNZ et al (2009) have shown that methyl jasmonate selectively induces abscission of mature grape berries and promotes dry stem scars on the abscission zone, demonstrating that these effects are dose dependant.…”

Section: Iii3 Introductionmentioning

confidence: 99%

“…When the clusters cotreated with methyl jasmonate (20 and 40 mmol•L -1 ) and ethephon (1000 mg•L -1 ) were shaken by hand at harvest, the percentages of detached berries presenting scar tissue in the abscission zone were greater than 50 %(Fig. III.2) GONZÁLEZ-HERRÁNZ et al (2009). in cv.…”

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Utilización de agentes de abscisión de la uva para optimizar la vendimia mecanizada

Ollauri¹

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Using salicylic acid‐responsive promoters to drive the expression of jasmonic acid‐regulated genes enhances plant resistance to whiteflies

Wu,

Han,

Liang

et al. 2024

Pest Management Science

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BACKGROUNDJasmonic acid (JA) is an important phytohormone used to defend against herbivores, but it does not respond to whitefly feeding. Conversely, another phytohormone, salicylic acid (SA), is induced when plants are fed upon by whiteflies. JA has a better anti‐whitefly effect than SA; however, there is limited research on how to effectively improve plant resistance by utilizing the different responses of these phytohormones to whitefly feeding.RESULTSWe discovered that protease inhibitors 8 (PI8) and terpene synthase 10 (TPS10) located downstream of the JA‐regulated pathway in plants have anti‐whitefly effects, but these two genes were not induced by whitefly feeding. To identify whitefly‐inducible promoters, we compared the transcriptome data of tobacco fed upon by Bemisia tabaci with the control. We focused on pathogenesis‐related (PR) genes because they are known to be induced by SA. Among these PR genes, we found that expression levels of pathogenes‐related protein 1C‐like (PR1) and glucose endo‐1,3‐beta‐glucosidase (BGL) can be significantly induced by whitefly feeding and regulated by SA. We then engineered the whitefly‐inducible promoters of BGL and PR1 to drive the expression of PI8 and TPS10. We found that compared with control plants that did not induce the expression of PI8 or TPS10, transformed plants expressing PI8 or TPS10 under the PR1 or BGL promoter showed a significant increase in the expression levels of PI8 and TPS10 after whitefly infection, significantly improving their resistance to whiteflies.CONCLUSIONOur findings suggest that using SA‐inducible promoters as tools to drive the expression of JA‐regulated defense genes can enhance plant resistance to whiteflies. Our study provides a novel pathway for the enhancement of plant resistance against insects. © 2024 Society of Chemical Industry.

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Potential of Methyl Jasmonate as a Harvest Aid for ‘Thompson Seedless’ Grapes: Concentration and Time Needed for Consistent Berry Loosening

Cited by 12 publications

References 9 publications

Ethephon and Methyl Jasmonate Affect Fruit Detachment in Rabbiteye and Southern Highbush Blueberry

Ethephon and Methyl Jasmonate Affect Fruit Detachment in Rabbiteye and Southern Highbush Blueberry

Utilización de agentes de abscisión de la uva para optimizar la vendimia mecanizada

Using salicylic acid‐responsive promoters to drive the expression of jasmonic acid‐regulated genes enhances plant resistance to whiteflies

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