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Effect of cold storage duration on budbreak, root regeneration and on carbohydrate content of 'Mme A. Meilland' rose plants.

Menoud, M. A.; Mauget, J. C.; Frossard, J. S.;

Acta Horticulturae Year: 1991 Issue: No. 298 Pages: 237-245 Ref: 17 ref.

1991

บทคัดย่อ

Effect of cold storage duration on budbreak, root regeneration and on carbohydrate content of 'Mme A. Meilland' rose plants.

Roses (Rosa hybrida, cv. Mme A. Meilland) grafted onto R. canina (cv. Froebelii) were lifted on 14 Nov. 1988 and placed in cold storage at 0-2 deg C, RH near saturation. After 1, 4, 8, 12 or 16 weeks in cold storage the bare-rooted roses were planted in a controlled environment room (20 deg , 60% RH day/80% RH night and a 12 h photoperiod) and tested for bud growth ability and root regeneration potential. The distribution of soluble carbohydrates and starch in different plant parts was also examined. The time required for budbreak was shorter and the number of buds released greater, the longer the plants remained in cold storage. After 1, 4 or 8 weeks' storage, 19 days were required for budbreak, whereas buds broke after 12 days in plants stored for 12 or 16 weeks. In general, root regeneration potential increased with increasing duration of storage. A rapid increase in root regeneration occurred after budbreak, particularly in plants cold-stored for 12 or 16 weeks. After 1, 4 and 8 weeks' storage, glucose, fructose and sucrose concentrations in the root system increased, whilst starch concentration decreased. After 12 and 16 weeks' storage, glucose and fructose concentrations in the whole plant increased, sucrose concentration decreased and starch hydrolysis ceased.