Effects of the plant growth regulator prohexadione-calcium and the SAR-inducer acibenzolar-S-methyl on the quality of apples at harvest

Roux, C.; Lemarquand, Arnaud; Orain, Gilles; Campion, Claire; Simoneau, Philippe; Poupard, Pascal

doi:10.1080/14620316.2006.11512040

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…The 32 P labeled RNA probe corresponds to a 221 bp fragment specific to gene members of the APa or the APb subclass (Ziadi et al 2001). The standardization of the experiments using the expression of 18S RNA and the analysis of RNA blots were performed as described in Roux et al (2006). Reverse transcription of mRNA was carried out using oligo-d(T) and random priming.…”

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

Specific activation of PR-10 pathogenesis-related genes in apple by an incompatible race of Venturia inaequalis

Chevalier¹,

Parisi²,

Guèye³

et al. 2008

Biologia plant.

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Apple (Malus × domestica Borkh. cv. Golden Delicious) trees were inoculated with fungal pathogens, corresponding either to an incompatible strain of Venturia inaequalis or to non-host pathogens (Venturia pyrina, Alternaria brassicicola) in order to characterize the regulation of PR-10 genes in these different situations in relationship to symptom development. Macro-and microscopic observations of the plant-fungus interactions revealed typical symptoms of resistance with V. inaequalis and symptoms of hypersensitivity (HR) on around 5 % of leaves with V. pyrina. No HR was microscopically observed with A. brassicicola. In the non-host situations, the PR-10 expression in leaves at the transcriptional level was not (A. brassicicola) or very slightly (V. pyrina) activated. This strongly suggests that PR-10 is not a component of the non-host resistance in the interactions studied here. By contrast specific up-regulation of PR-10 was evident after inoculation with V. inaequalis.

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Section: ⎯⎯⎯⎯mentioning

confidence: 99%

Specific activation of PR-10 pathogenesis-related genes in apple by an incompatible race of Venturia inaequalis

Chevalier¹,

Parisi²,

Guèye³

et al. 2008

Biologia plant.

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“…In particular, Pro-Ca treatment has been shown to increase the accumulation of malic acid, which contributes significantly to fruit acidity and flavor improvement [ 12 ]. This change in sugar-acid composition caused by Pro-Ca treatment can have a significant impact on the overall flavor and quality of the fruit [ 13 ]. Furthermore, Pro-Ca treatment enhances fruit aroma by upregulating the biosynthesis of volatile compounds [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Prohexadione-calcium improves grape quality by regulating endogenous hormones, sugar and acid metabolism and related enzyme activities in grape berries

Li,

Yang,

Dai

et al. 2024

BMC Plant Biol

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Prohexadione-Calcium (Pro-Ca) plays key roles in improving fruit quality and yield by regulating various aspects of plant growth. However, the effects of how Pro-Ca regulates the regulation of sugar and acid balance and its impact on the production of volatile aroma substances during fruit growth and development are poorly understood. In this study, the Pro-Ca solutions developed at concentrations of 200, 400, 600 and 800 mg·L-1 were sprayed on the entire “Chardonnay” grape tree 22, 42, 62 and 82 days after initial flowering. The values of endogenous hormones, sugar and acid content, enzyme activities and flavor content were then measured in grapes 45, 65, 85 and 105 days (ripeness stage) after the initial flowering. The results showed that Pro-Ca had significant effects on fruits during development, including reducing ABA content, increasing ZT, GA3 and IAA levels, promoting fruit ripening and enhancing enzymes, which are involved in sugar and acid synthesis. Consequently, these effects led to an increase in sugar and acid content in the berries. Particularly during the ripening phase, the application of 600 mg L-1 Pro-Ca resulted in an increase in soluble sugar content of 11.28% and a significant increase in citric acid and malic acid content of 97.80% and 68.86%, respectively. Additionally, Pro-Ca treatment enhanced both the variety and quantity of aroma compounds present in the berries, with the 600 mg·L-1 Pro-Ca treatment showcasing the most favorable impact on volatile aroma compounds in ‘Chardonnay’ grapes. The levels of aldehydes, esters, alcohols, phenols, acids, ketones, and terpenes were significantly higher under the 600 mg·L-1 Pro-Ca treatment compared to those of control with 51.46 − 423.85% increase. In conclusion, Pro-Ca can regulate the content of endogenous hormones and the activities of enzymes related to sugar and acid metabolism in fruit, thereby increasing the content of soluble sugar and organic acid in fruit and the diversity and concentration of fruit aroma substances. Among them, foliar spraying 600 mg · L-1 Pro-Ca has the best effect. In the future, we need to further understand the molecular mechanism of Pro-Ca in grape fruit to lay a solid foundation for quality improvement breeding.

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“…The only research on this fruit has been performed in postharvest studies (Ge et al, 2019). In field or greenhouse, BTH spray treatments have been used on Yali pear (Cao and Jiang, 2006), on strawberry (Hukkanen et al, 2007), on grape (Iriti et al, 2004;Gil-Muñoz et al, 2017), and on apple fruit and leaves (Brisset et al, 2000;Roux et al, 2006). For this reason, the analysis of response of blueberry to BTH, effective in promoting the accumulation of antioxidants like AsA and phenolic compounds, is particularly interesting.…”

Section: Introductionmentioning

confidence: 99%

Benzothiadiazole enhances ascorbate recycling and polyphenols accumulation in blueberry in a cultivar-dependent manner

2022

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Benzothiadiazole (BTH) is a functional analogue of salicylic acid able to induce systemic acquired resistance in many horticultural crops. The aim of the work was to investigate how BTH may affect i) fruit quality, ii) ascorbic acid (AsA) oxidation and recycling metabolism and iii) phenolic compounds accumulation, during development and ripening of berries from the two selected cultivars. Blueberry (Vaccinium corymbosum L.) plants (cv ‘Brigitta’ and ‘Duke’) were treated with 0.118 mM BTH every two weeks during ripening, then all fruits of each plant were harvested and divided in four developmental stages. Results indicated that BTH had no marked effects on fruit quality parameters. During the first developmental stage, BTH negatively affected dry matter in both cv, while soluble solids and AsA content were affected in ‘Duke’. In fully ripe berries, BTH reduced dry matter in ‘Duke’ and enhanced soluble solids content in ‘Brigitta’, while diminishing titratable acidity. AsA content was positively affected by BTH in ‘Duke’, but not in ‘Brigitta’. The effect of BTH on the enzymes involved in AsA recycling was recorded in berries at the third (fruit more than half pigmented) and fourth developmental stages. After treatment, in both cv ascorbate peroxidase (APX) activity increased in fully ripe berries, while monodehydroascorbate reductase (MDHAR) activity was stimulated at the third ripening stage. Conversely, the activities of dehydroascorbate reductase (DHAR) and glutathione reductase (GR) were enhanced only in ‘Brigitta’ and in ‘Duke’, respectively. BTH stimulated total polyphenols, flavonoid and anthocyanin accumulation in ‘Brigitta’ and in ‘Duke’ at the third and fourth ripening stages. In fully ripe berries, BTH enhanced the accumulation of delphinidins, cyanidins, petunidins and peonidins in ‘Brigitta’, while in ‘Duke’ it increased all classes of anthocyanidins, including malvidin. On the contrary, the relative proportion of the individual anthocyanins was only slightly affected by BTH treatment, mainly regarding delphinidin and malvidin at the third and fourth stage of ripening of ‘Duke’ and ‘Brigitta’, respectively. These results show that preharvest BTH application can positively impact on fruit bioactive compounds levels, affecting AsA recycling and content and increasing polyphenols accumulation in fruit, but partly depending on cv and ripening stage.

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Effects of the plant growth regulator prohexadione-calcium and the SAR-inducer acibenzolar-S-methyl on the quality of apples at harvest

Cited by 4 publications

References 21 publications

Specific activation of PR-10 pathogenesis-related genes in apple by an incompatible race of Venturia inaequalis

Specific activation of PR-10 pathogenesis-related genes in apple by an incompatible race of Venturia inaequalis

Prohexadione-calcium improves grape quality by regulating endogenous hormones, sugar and acid metabolism and related enzyme activities in grape berries

Benzothiadiazole enhances ascorbate recycling and polyphenols accumulation in blueberry in a cultivar-dependent manner

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