Analysis of seed growth, fruit growth and composition and phospoenolpyruvate carboxykinase (PEPCK) occurrence in apricot (Prunus armeniaca L.)
Analysis of seed growth, fruit growth and composition and phospoenolpyruvate carboxykinase (PEPCK) occurrence in apricot (Prunus armeniaca L.)
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DOI：
10.1016/j.scienta.2015.01.025
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发表时间：
2015-04-21
影响因子：
4.3
通讯作者：
Famiani, F.
中科院分区：
文献类型：
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作者：
Baldicchi, A.;Farinelli, D.;Famiani, F.
2011年在意大利中部进行了一项研究，以获得关于杏果实和种子生长、中果皮+外果皮中糖和有机酸含量变化以及磷酸烯醇式丙酮酸羧激酶（PEPCK）发生的新信息。果实和种子不同部位的最大相对生长速率出现在整个果实发育过程中的不同时期。内果皮具有最大的RGR在第一阶段的果实发育，种子（胚+胚乳）在第二阶段，以及中果皮+外果皮，在第三阶段。在整个发育过程中，果实直径的增加大于其长度的增加，并且果实变得更加球形。葡萄糖是未成熟果实中含量最高的可溶性糖。成熟果实中可溶性糖含量最高的是蔗糖，其次是葡萄糖、果糖和山梨醇。淀粉只在果实生长初期检测到，含量很低。在果实发育过程中，（mg果（-1））的苹果酸和柠檬酸含量在成熟期前半期增加，后半期才出现净异化现象，PEPCK在有机酸净异化和无有机酸净异化时均存在于果实可食部分，这表明它除了参与贮存有机酸的净异化作用外，还在其它过程中起作用。(C)2015 Elsevier B. V.版权所有。
In 2011, in central Italy, a study was carried out in order to acquire new information on the growth of the fruit and seed of apricot, the changes in the contents of sugars and organic acids and the occurrence of phosphoenolpyruvate carboxykinase (PEPCK) in the mesocarp + epicarp. The maximum relative growth rate (RGR) of the different parts of the fruit and seed occurred at different times during the development of the whole fruit. The endocarp possessed the maximum RGR during stage I of fruit development, the seed (embryo + endosperm) during stage II and, together the mesocarp + epicarp, during stage III. Throughout development, the increase in diameter of the fruit was higher than its increase in length, and the fruit became more spherical. In unripe fruit glucose was the most abundant soluble sugar. In ripe fruit sucrose was the most abundant soluble sugar, followed by glucose and then by fructose and sorbitol. Starch was only detected in the first part of fruit growth and the amounts were very low. During fruit development, the absolute contents (mg fruit(-1)) of malate and citrate increased up to the first half of ripening period and net dissimilation was only observed in the second part of it. PEPCK was present in the edible parts of the fruit both when there was a net dissimilation of organic acids and when there was not, and this suggests that it functions in other processes besides an involvement in the net dissimilation of stored organic acids. (C) 2015 Elsevier B.V. All rights reserved.