New Zealand Journal of Crop and Horticultural Science
abstracts
Effects of application of thidiazuron (TDZ), gibberellic acid (GA3), and 2,4-dichlorophenoxyacetic acid (2,4-D) on fruit size and quality of Actinidia deliciosa ‘Hayward’
F. Famiani
P. Proietti
M. Pilli
Dipartimento di Scienze Agrarie e Ambientali
Università degli Studi di Perugia – Borgo XX Giugno
74-06121 Perugia, Italy
email: ffamiani@unipg.it
A. Battistelli
S. Moscatello
Istituto di Biologia Agroambientale e Forestale
Consiglio Nazionale delle Ricerche – Viale Marconi
2-05010 Porano (TR), Italy
Abstract The effects of dipping fruit in solutions made from factorial combinations of 0 and 10 ppm thidiazuron (TDZ), 0 and 50 ppm gibberellic acid (GA3), and 0 and 20 ppm 2,4-dichlorophenoxyacetic acid (2,4-D) on fruit size and quality characteristics in Actinidia deliciosa ‘Hayward’ were evaluated. When the compounds were used together significant interactions, TDZ × GA3 and TDZ × GA3 × 2,4-D, were recorded for the increase in fruit weight (+42% and +94%, respectively, compared with untreated fruits that had an average weight of 82.7 g). TDZ and 2,4-D were very effective in increasing fruit weight when used alone (+31% and +32%, respectively, compared with untreated fruits) or in combination with the other compounds. GA3 only showed an appreciable effect when used in combination with TDZ or TDZ + 2,4-D. Growth regulator treatments did not affect seed weight and number per fruit. TDZ accelerated fruit ripening and caused a change in fruit shape. TDZ and GA3 did not affect the fruit carbohydrate content at harvest, whereas the use of 2,4-D slightly decreased the fruit total carbohydrate content. The results indicate that the growth potential of kiwifruit is much higher than is normally expressed.
Keywords thidiazuron; gibberellic acid; 2,4-dichlorophenoxyacetic acid; plant growth regulators; hormonal interaction; kiwifruit growth; carbohydrate content; kiwifruit; Actinidia deliciosa
New Zealand Journal of Crop and Horticultural Science, 2007, Vol. 35: 341–347
0014–0671/07/3503–0341 © The Royal Society of New Zealand 2007
H06081; Online publication date 21 August 2007. Received 22 August 2006; accepted 11 April 2007
PDF file of entire paper: Print-quality
(268K) |
screen-quality (230K)
This year's abstracts
|
Journal home page |
All abstracts |
Publishing home page
