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首页> 外文期刊>Revista Brasileira de Fruticultura >Conteúdo de carboidratos em gemas e ramos de macieira durante o outono e inverno em regi?o de baixa ocorrência de frio
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Conteúdo de carboidratos em gemas e ramos de macieira durante o outono e inverno em regi?o de baixa ocorrência de frio

机译：低温低发地区秋季和冬季苹果树芽和树枝中的碳水化合物含量

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This work aimed at evaluating the carbohydrate content of one year old buds and stems of apple trees cv. 'Imperial Gala' with or without supplementary chill during autumn and winter, cultivated in a region of low chill occurence. The stems were collected in Porto Amazonas, Parana State, Brazil, at intervals of 21 days from April to August (04/19, 05/10, 05/31, 06/21, 07/12, 08/02 and 08/23) and were treated or not with 1,440 hours of chill (4 to 7°C). The carbohydrates were analysed in buds and stem tissues close to the buds. The soluble carbohydrates (SC) were evaluated by the phenol-sulfuric acid method and the final determination was made by spectrophotometry (490 nm absorbance). The non-soluble carbohydrates (NC) were estimated by the mass of vegetal tissues non-soluble in alcohol and soluble in alcaline medium, after freeze drying. The total carbohydrate (SC + NC) content represented 13.8 to 20.2 g.100g-1 of dry matter of buds and 9.9 to 15.3 g.100g-1 of dry matter of stems. The buds presented a higher level of SC in the initial dormancy period and a higher level of NC in the more intense dormancy period. The NC accumulation in buds were anticipated by the early chill treatment and the chill treatment during endodormancy promoted the SC accumulation. The SC content in stems increased along the dormancy development while the NC content remained constant.
机译：这项工作旨在评估苹果树cv一岁芽和茎中的碳水化合物含量。在较低的寒冷地区种植的“帝国晚会”，在秋季和冬季有或没有补充寒冷。从4月至8月（21/04 / 19、05 / 10、05 / 31、06 / 21、07 / 12、08 / 02和08/23）间隔21天在巴西巴拉那州的Porto Amazonas收集茎。 ），并以1,440小时的低温（4至7°C）处理。在芽和靠近芽的茎组织中分析了碳水化合物。通过苯酚-硫酸法评估可溶性碳水化合物（SC），并通过分光光度法（490 nm吸光度）进行最终测定。冷冻干燥后，通过不溶于醇且可溶于碱性介质的植物组织的质量来估计不溶性碳水化合物（NC）。总碳水化合物（SC + NC）含量为13.8至20.2 g.100g-1的芽干物质和9.9至15.3 g.100g-1的茎干物质。芽在初始休眠期表现出较高的SC水平，而在更强烈的休眠期表现出较高的NC水平。早期的冷处理可以预料芽中的NC积累，而异味期间的冷处理促进了SC的积累。茎中的SC含量随着休眠的发展而增加，而NC含量保持恒定。

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