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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Aquaporins in the honeybee crop—a new function for an old organ
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Aquaporins in the honeybee crop—a new function for an old organ

机译：蜜蜂农作物中的水通道蛋白-旧器官的新功能

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摘要

Nectar used by bees as a food source is collected and stored in the crop, where it is transported and converted into honey. The production of honey involves water uptake from nectar. However, the crop is a portion of the insect foregut that has been characterized solely as a food storage organ. Aquaporins are integral membrane proteins that function as specific canal for water transport and are abundant in tissues with high water permeability. In this study, we detected five predicted genes for aquaporins in the gut of the honeybee Apis mellifera. We evaluated the aquaporins’ localization in the crop by using an anti-aquaporin antibody produced against the peptide sequence from one of the expressed genes, which was detected in the crop epithelium, particularly in the apical portions of the cells. Furthermore, we also showed an increase in sugar concentration in a sucrose solution collected from the crop lumen a few minutes after feeding, indicating that water uptake occurs during storage of nectar in the crop, suggesting a previously unidentified function for the honeybee crop.
机译：被蜜蜂用作食物来源的花蜜被收集并储存在农作物中，然后被运输并转化为蜂蜜。蜂蜜的生产涉及从花蜜中摄取水分。但是，农作物是昆虫前肠的一部分，仅被表征为食物储藏器官。水通道蛋白是不可或缺的膜蛋白，可作为特定的水运通道，并在具有高透水性的组织中丰富。在这项研究中，我们在蜜蜂Apis mellifera的肠道中检测到了5个预测的水通道蛋白基因。我们通过使用抗水通道蛋白抗体来评估作物中水通道蛋白的定位，该抗体是针对一种表达基因的肽序列产生的，该序列在作物上皮中特别是在细胞的顶端被检测到。此外，我们还显示，喂食后几分钟，从农作物内腔收集的蔗糖溶液中的糖浓度会增加，这表明在农作物的花蜜贮藏过程中会发生吸水现象，这表明蜜蜂农作物的功能以前无法确定。

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