Involvement of Ethylene in the Pedicel in Preharvest Abscission of 'Tsugaru' Apple

Arakawa, Osamu; Akagi, Aya; Asada, Takenori; Shiozaki, Yunosuke

doi:10.2503/jjshs.73.301

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…It is also likely that AVG was applied to the AZ in the apple only treatments as the collars placed around the apples were designed to prevent spray being applied to the leaves but much of the petiole would have been treated. Fruit abscission is a final consequence of a change in the balance between auxin (specifically indoleacetic acid; IAA) to ethylene in the AZ (Gonzalez-Carranze et al 1998) where IAA acts to retard AZ activation and ethylene enhances abscission (Arakawa et al 2004;Bangerth 2000). AVG application to the petioles of bagged apples could inhibit ethylene production in the AZ but not the ethylene coming from the fruit as it ripens.…”

Section: Discussionmentioning

confidence: 98%

“…AVG application to the petioles of bagged apples could inhibit ethylene production in the AZ but not the ethylene coming from the fruit as it ripens. Arakawa et al (2004) have shown that ethylene produced in ripening apple flesh and seeds is translocated to the AZ where it acts to induce fruit abscission, so it is difficult to see how such a small change in ethylene production following application of AVG to the pedicle could potentially delay fruit drop. Our studies do suggest however, that there is an effect as fruit drop in the bagged apple only treatment (Apple only-bagged) was numerically less (P = 0.0542) than the untreated in Orchard 1 and significantly less (P = 0.0003) in Orchard 2 ( Table 2).…”

Section: Discussionmentioning

confidence: 98%

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Foliar application of aminoethoxyvinylglycine (AVG) delays fruit ripening and reduces pre-harvest fruit drop and ethylene production of bagged “Kogetsu” apples

et al. 2006

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Covering apple fruits with double layer waterproof bags to enhance fruit quality and evenness of blush colour is typical on many cultivars in Korea and Japan. Aminoethoxyvinylglycine (AVG) applied to unbagged apple fruits at 3-4 weeks before commercial harvest reduces ethylene production in the fruit, delays fruit ripening and reduces pre-harvest fruit drop. Spray application of AVG to trees of bagged apples should have no effect on apple ripening as there is no direct contact with the fruit and the translocation of AVG in apple trees is regarded as negligible. However, preliminary experiments suggested that AVG applied to trees of bagged apples reduced pre-harvest fruit drop in ''Kotgetsu'' apples. This study investigated the effect of spray treatments of 125 ppm of AVG on fruit drop, fruit ripening (firmness, starch conversion and soluble solids) and ethylene production to whole trees with bagged or unbagged ''Kogetsu'' fruit, as well as sprays of only the bagged or unbagged fruit on trees on two orchards. AVG applied to whole trees with unbagged apples reduced fruit drop from an average of 58.9% to 10.4%, delayed starch conversion and decreased ethylene production. AVG applied to whole trees with bagged fruit was equally effective in reducing pre-harvest drop, delaying fruit ripening and reducing ethylene production. Application of AVG to unbagged fruit only was nearly as effective as application to whole trees with unbagged fruit but application to bagged fruit only had no effect on fruit ripening or ethylene production. Application of AVG to bagged fruit only did reduce fruit drop to an average of 42.5% but this was not as effective as spraying unbagged fruit only or whole trees with bagged fruit. Possible mechanisms for this effect are discussed.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 98%

Foliar application of aminoethoxyvinylglycine (AVG) delays fruit ripening and reduces pre-harvest fruit drop and ethylene production of bagged “Kogetsu” apples

et al. 2006

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Foliar application of aminoethoxyvinylglycine (AVG) delays fruit ripening and reduces pre-harvest fruit drop and ethylene production of bagged “Kogetsu” apples

et al. 2006

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The germination stimulants for root parasitic plants Striga and Orobanche produced by sorghum (Sorghum bicolor (L.) Moench), maize (Zea mays L.), and pearl millet (Pennisetum typhoideum Rich.) were examined. Characterization of strigolactones in the root exudates from the plants grown hydroponically was conducted by comparing retention times of germination stimulants on reverse phase high performance liquid chromatography (HPLC) with those of synthetic standards, and by using HPLC linked with tandem mass spectrometry (LC/MS/MS). All the plants tested, except for a sorghum cultivar Swarna, were found to exude two major stimulants, 5-deoxy-strigol, which is known as a branching factor for arbuscular mycorrhizal (AM) fungi, and an isomer of strigol, tentatively named sorghumol. Swarna was found to exude 5-deoxystrigol and strigol. These results imply that 5-deoxy-strigol is one of major germination stimulants of gramineous plants and that major stimulants may differ even among cultivars within the same species.

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Anatomical and histochemical studies of separation process on the juncture tissues between peduncle and bourse on apple fruit

Yamada¹,

Kobayashi²,

Tabuchi³

2018

Acta Hortic.

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Involvement of Ethylene in the Pedicel in Preharvest Abscission of 'Tsugaru' Apple

Cited by 3 publications

References 6 publications

Foliar application of aminoethoxyvinylglycine (AVG) delays fruit ripening and reduces pre-harvest fruit drop and ethylene production of bagged “Kogetsu” apples

Foliar application of aminoethoxyvinylglycine (AVG) delays fruit ripening and reduces pre-harvest fruit drop and ethylene production of bagged “Kogetsu” apples

Foliar application of aminoethoxyvinylglycine (AVG) delays fruit ripening and reduces pre-harvest fruit drop and ethylene production of bagged “Kogetsu” apples

Anatomical and histochemical studies of separation process on the juncture tissues between peduncle and bourse on apple fruit

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