The Relationship and Changing Rate of Strawberry Crown Carbohydrate as Result of Chilling Hours and Cold Storage

Abstract

The relationship between the strawberry crown content (Carbohydrates and Nitrogen) and the accumulated neutral chilling hours, moreover, the changing rate of content as affected by artificial cold storage was investigated in Sana’a University. Strawberry Seedling was digging at the three different periods during winter season. Crown carbohydrates and nitrogen was analysis at the time of digging and after cold storage. The result indicated that; increasing chilling hours led to increasing crown contents of all types of carbohydrate and no significant on nitrogen level. Changing rates occurs in seedling was calculated to seedling as effect of Cold storage, during the digging date (natural chilling) and between digging date and after storage. This study concluded that: Natural chilling more effective than that carried out using cold storage in the dark. The cold storage at 2 Cᵒ only suggested for short period, but not as an alternative the natural chilling. The data from this study could use for mange strawberry in nursery.

The influence of chilling hours on root starch content, growth and yield of strawberry tray plants

“…Several studies have shown that the quality of planting material and their storability are related to the sugar content in their organs (roots, crown), which in turn depends on the climatic conditions prevailing during cultivation [Cieśliński and Borecka 1989, Voth and Bringhurst 1990, Hicklenton and Reekie 1998, Lopez et al 2002, Palha et al 2002, Al-Doubibi et al 2021. Starch accumulation in plant organs occurs in low above-zero temperatures under suitable light conditions [Maas 1986].…”

The habit of strawberry flowering is the key for runner propagation, where the photoperiod is the main environmental factor - A review

“…Flower initiation in strawberries requires chilling (Ito and Saito, 1962;Darrow, 1966;Kinet et al, 1993;Lieten, 1997;Almadhagi et al, 2018;Aldoubibi et al, 2021). For the best production and berry quality, both types of strawberries (EB and SB) required dif ferent amounts of chilling period before planting.…”

“…Long cold storage reduced vigour and glucose stores of mother plants (Lieten et al, 1995). Plants that have been stored cold for a long period should have a higher starch content and if possible, be culti vated in nurseries located at higher altitudes (López et al, 2002;Aldoubibi et al, 2021). On the other hand, naturally cool nighttime temperatures at high er elevations help plants collect more starch.…”