Articles
Aminoethoyxvinylglycine (AVG) does not improve fruit firmness of Stevens and Howes cranberry
Article number
1357_32
Pages
223 – 228
Language
English
Abstract
Fruit firmness is an important quality parameter in cranberry (Vaccinium macrocarpon) production.
Firmer fruit are easier to slice during processing resulting in a more efficient conversion of cranberries to high-value products.
Currently, there are no preharvest cultural practices to improve fruit firmness in cranberry production.
The plant growth regulator aminoethoxyvinylglycine (AVG), has been previously reported to improve fruit firmness in sweet cherry.
Sweet cherry and cranberry are both classified as non-climacteric fruit, so the mechanism of enhancing fruit firmness is expected to be similar.
The objective of our study was to test the efficacy of the plant growth regulator AVG in improving fruit firmness in Stevens and Howes cranberry.
The trials were conducted in East Wareham, Massachusetts, USA. Four treatments were evaluated; an untreated control, 50, 100, and 150 ppm AVG. The trial was laid out in a randomized complete block design with five replications per treatment and buffer rows between treatments and reps.
The treatments were applied with 0.1% (v/v) SILWET L-77 organosilicone surfactant.
Samples for assessing fruit quality and yield were collected at harvest from each treatment replication.
Foliar application of AVG did not increase fruit firmness in both Stevens and Howes cranberry.
Fruit color, weight, the incidence of fruit rot, and yield were not affected by the application of AVG in both cultivars.
The application of AVG did not affect total soluble solids and titratable acidity in Stevens. However, in Howes, all the treatments significantly reduced total soluble solids and titratable acidity compared to the untreated control.
The application of AVG with an organosilicone surfactant did not improve fruit firmness in Stevens and Howes cranberry.
The ineffectiveness of AVG in cranberry might be partly due to the surface morphology of the cranberry cuticle, which does not lend itself to the penetration of sprayed chemicals compared to sweet cherry.
Firmer fruit are easier to slice during processing resulting in a more efficient conversion of cranberries to high-value products.
Currently, there are no preharvest cultural practices to improve fruit firmness in cranberry production.
The plant growth regulator aminoethoxyvinylglycine (AVG), has been previously reported to improve fruit firmness in sweet cherry.
Sweet cherry and cranberry are both classified as non-climacteric fruit, so the mechanism of enhancing fruit firmness is expected to be similar.
The objective of our study was to test the efficacy of the plant growth regulator AVG in improving fruit firmness in Stevens and Howes cranberry.
The trials were conducted in East Wareham, Massachusetts, USA. Four treatments were evaluated; an untreated control, 50, 100, and 150 ppm AVG. The trial was laid out in a randomized complete block design with five replications per treatment and buffer rows between treatments and reps.
The treatments were applied with 0.1% (v/v) SILWET L-77 organosilicone surfactant.
Samples for assessing fruit quality and yield were collected at harvest from each treatment replication.
Foliar application of AVG did not increase fruit firmness in both Stevens and Howes cranberry.
Fruit color, weight, the incidence of fruit rot, and yield were not affected by the application of AVG in both cultivars.
The application of AVG did not affect total soluble solids and titratable acidity in Stevens. However, in Howes, all the treatments significantly reduced total soluble solids and titratable acidity compared to the untreated control.
The application of AVG with an organosilicone surfactant did not improve fruit firmness in Stevens and Howes cranberry.
The ineffectiveness of AVG in cranberry might be partly due to the surface morphology of the cranberry cuticle, which does not lend itself to the penetration of sprayed chemicals compared to sweet cherry.
Publication
Authors
G. Mupambi
Keywords
Vaccinium macrocarpon, fruit quality, sweetened dried cranberries
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