Abstract
Bud break in apple (Golden Delicious,Malus domestica Borkh) was induced by thidiazuron (N-phenyl-N′-1,2,3-thidiazol-5-ylurea). In control and thidiazuron-treated shoots, higher amounts of soluble carbohydrates (sorbitol, fructose, glucose, sucrose) and galacturonic acid were found in the phloem, but higher amounts of starch and cell wall polysaccharides, including cellulose and xylose, were found in the xylem. A decrease in soluble carbohydrates and starch in both phloem and xylem was associated with induction of bud break by thidiazuron. However, little change in cell wall polysaccharides was found. Total carbohydrates were higher in the upper than in the lower portion of shoots. The breaking of dormancy by thidiazuron was also associated with an increase in organic acid content and respiration in buds. KCN inhibited bud respiration during all stages of development. Organic acid content was inversely related to carbohydrate content in developing buds. Axes contained more carbohydrates and organic acids than did scales.
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References
Azcon-Bieto J, Lambers H, Day DA (1983) The effect of photosynthesis and carbohydrate status on respiratory rates and the involvement of the alternative pathway in leaf respiration. Plant Physiol 10:237–245
Bieleski RL (1969) Accumulation and translocation of sorbitol in apple phloem. Aust J Biol Sci 22:611–621
Bieleski RL (1977) Accumulation of sorbitol and glucose by leaf slices ofRosaceae. Aust J Plant Physiol 4:11–24
Cole ME, Solomos T, Faust M (1982) Growth and respiration of dormant flower buds ofPyrus communis andPyrus calleryana. J Am Soc Hortic Sci 107:226–231
Grant CR, apRees T (1981) Sorbitol metabolism by apple seedlings. Phytochemistry 20:1505–1511
Hansen P, Grausland J (1973)14C-studies on apple trees. VIII. The seasonal variation and nature of reserves. Physiol Plant 28:24–32
Lambers H (1980) The physiological significance of cyanide-resistant respiration in higher plants. Plant Cell Environ 3:293–302
Priestley CA (1960) Seasonal changes in the carbohydrate resource of some 6-year-old apple trees. Annu Rep East Mall Res Stat 1959, pp 70–77
Priestley CA (1970) Carbohydrate storage and utilization. In: Luckwill LC, Cutting CV (eds) Physiology of tree crops. Academic Press, New York, p 382
Priestley CA (1981) Perennation in woody fruit plants and its relationship to carbohydrate turn-over. Ann App Biol 98:548–552
Skene KG (1971) Hormonal effect on sugar release from vine canes. Ann Bot 35:277–286
Thornber JP, Northcote DH (1961) Changes in the chemical composition of a cambial cell during its differentiation into xylem and phloem tissue in trees. Biochem J 81:449–464
Wang SY, Byun JK, Steffens GL (1985) Controlling plant growth via the gibberellin biosynthesis system. II. Biochemical and physiological alterations in apple seedlings. Physiol Plant 63:169–175
Wang SY, Steffens GL, Faust M (1986a) Breaking bud dormancy in apple with a plant bioregulator, thidiazuron. Phytochemistry 25:311–317
Wang SY, Steffens GL, Faust M (1986b) Effect of paclobutrazol on accumulation of carbohydrates in apple wood. HortScience 21:1419–1421
Wang SY, Steffens GL, Faust M (1986c) Effect of paclobutrazol on cell wall polysaccharide composition of apple tree. Phytochemistry 25:2493–2496
Webb KL, Burley JWA (1962) Sorbitol translocation in apple. Science 137:766
Yamaki S, Ishikawa K (1986) Roles of four sorbitol related enzymes and invertase in the seasonal alteration of sugar metabolism in apple tissue. J Am Soc Hort Sci 111:134–137 A0443006 00004 CS-SPJRNPDF [HEADSUP]
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Wang, S.Y., Ji, Z.L. & Faust, M. Metabolic changes associated with bud break induced by thidiazuron. J Plant Growth Regul 6, 85–95 (1987). https://doi.org/10.1007/BF02026458
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DOI: https://doi.org/10.1007/BF02026458