ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effect of spring applications of paclobutrazol and uniconazole on 'Red Rosa' plum fruit development and storage quality.

Lurie, S.; Ben-Porat, A.; Lapsker, Z.; Zuthi, Y.; Greenblat, Y.; Ben-Arie, R.;

Journal of Horticultural Science Year: 1997 Vol: 72 Issue: 1 Pages: 93-99 Ref: 18 ref.

1997

บทคัดย่อ

Plum (Prunus salicina cv. Red Rosa) trees in an orchard in northern Israel were treated for two consecutive growing seasons (1993, 1994) with soil applications of paclobutrazol or uniconazole in the spring, at 2 rates termed low and high. The rate used in the second year was, in each case, half that in the first year. Fruit development and storage were assessed in each season and also in 1995, when no growth regulators were applied. Growth regulator treatments increased fruit weight and size in all 3 seasons. Treated trees flowered earlier the following year than untreated control trees. Fruits were harvested 3 times during the 1993 and 1994 seasons and once in 1995 and were stored at 0 deg C under both regular air and controlled atmosphere conditions for 6 and 10 weeks, respectively. In regular air storage, Red Rosa plums from all treatments maintained good quality for up to 6 weeks, except for the late harvested fruit, which began to show signs of gel breakdown (1993) or internal browning (199

4). In controlled atmosphere storage, similarly good quality was maintained for 8 or 10 weeks depending on the harvest date. The major physiological disorder which developed was internal browning. Paclobutrazol and uniconazole at the low rate did not affect the storability of the plums. However, the high rates of both regulators enhanced gel breakdown in fruits of one of the harvests in 1994, indicating a potential for deleterious effects when applied in excess.