Changes on carbohydrates and nitrogen content in the bark tissues induced by artificial chilling and its relationship with dormancy bud break in Prunus sp.
Changes on carbohydrates and nitrogen content in the bark tissues induced by artificial chilling and its relationship with dormancy bud break in Prunus sp.
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DOI：
10.1016/j.scienta.2008.06.011
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发表时间：
2008-11-04
影响因子：
4.3
通讯作者：
Agusti, M.
中科院分区：
文献类型：
--
作者：
Gonzalez-Rossia, D.;Reig, C.;Agusti, M.
桃，油桃，李和杏，从1岁的枝条在秋季落叶，茎插条暴露在恒定的3.0 +/- 0.1摄氏度，以模拟不同的冷积累处理（0，500，和1000冷却小时）。一组的10个切下的芽被迫发芽后，冷积累;第二组的10个切下的芽被用来分析糖，淀粉，铵，硝酸盐和蛋白质氮含量的树皮组织。树皮组织中的主要糖类为山梨醇、果糖和葡萄糖。而蔗糖和棉子糖在所有研究的李属中含量最低。山梨糖醇和淀粉浓度下降，而葡萄糖和果糖浓度增加，与冷却。铵态氮表现出更显着的增加与中度低温处理，在高低温暴露再次下降。没有修改蛋白质和硝态氮水平观察到由于冷却。低温处理增加开花强度表现出较高的铵和蛋白质氮含量的茎插条的树皮组织中，而那些降低开花强度表现出较高的淀粉和硝态氮含量，在三个的四个Primus SP。铵态氮含量与开花强度的相关性最高。(C)2008 Elsevier B. V.保留所有权利。
Stem cuttings of peach, nectarine, plum and apricot, obtained from 1-year-old shoots at leaf drop in autumn, were exposed at a constant 3.0 +/- 0.1 degrees C to simulate different chilling accumulation treatments (0, 500, and 1000 chilling hours). A set of 10 excised shoots was forced to budbreak after chilling accumulation; a second set of 10 excised shoots was used to analyse sugars, starch, and ammonium-, nitric- and proteinaceous-nitrogen content in the bark tissues. Sorbitol, fructose and glucose were the main sugars in the bark tissues. whereas sucrose and rafinose showed the lowest quantities in all Prunus sp. studied. Sorbitol and starch concentration decreased whereas glucose and fructose concentration increased with chilling. Ammonium-nitrogen showed the more dramatic increase with medium chilling treatment, decreasing again at high chilling exposure. No modifications in proteinaceous- and nitric-nitrogen levels were observed due to chilling. Chilling treatments increasing flowering intensity showed high ammonium- and proteinaceous-nitrogen content in the bark tissues of the stem cuttings, whereas those reducing flowering intensity showed high starch and nitric-nitrogen content, in three of the four Primus sp. studied. Ammonium-nitrogen content gives the highest correlation with flowering intensity. (C) 2008 Elsevier B.V. All rights reserved.