An understanding of fruit gas exchange is necessary to determine the carbon balance in grapevines, but little attention has been paid to the relationships among fruit respiration, plant water status, and genetic variability. The effect of plant water status and genotype on cluster respiration was studied over two seasons (2013 and 2014) under field conditions using a whole cluster respiration chamber. Whole cluster CO2 fluxes were measured in growing grapevines at hard-green, veraison and ripening stages under irrigated and non-irrigated conditions, and under light and dark conditions in two grapevine varieties, Tempranillo and Grenache. A direct relationship between cluster CO2 efflux and plant water status was found at hard-green stage. Genotype influenced the fruit CO2 efflux, that resulted in higher carbon losses in Tempranillo than in Grenache. Fruit respiration rates decreased from the first berry developmental stages to ripening stage. The integration of fruit respiration rates under light and dark conditions showed the magnitude of fruit carbon losses and gains as well as interesting variety and environmental conditions effects on those processes. This article is protected by copyright. All rights reserved.

中文翻译：

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植物水分状况和基因型影响葡萄树的果实呼吸

了解果实气体交换对于确定葡萄藤中的碳平衡是必要的，但很少关注果实呼吸、植物水分状况和遗传变异之间的关系。使用整个簇呼吸室在田间条件下研究了两个季节（2013 年和 2014 年）植物水分状况和基因型对簇呼吸的影响。在灌溉和非灌溉条件下，以及在明亮和黑暗条件下，两种葡萄品种丹魄和歌海娜的生长葡萄藤在硬绿、变绿和成熟阶段测量了整个簇 CO2 通量。在硬绿阶段发现簇状 CO2 流出与植物水分状况之间存在直接关系。基因型影响果实 CO2 外流，这导致丹魄的碳损失高于歌海娜。果实呼吸速率从第一个浆果发育阶段到成熟阶段下降。光照和黑暗条件下水果呼吸速率的整合显示了水果碳损失和增加的幅度，以及有趣的品种和环境条件对这些过程的影响。本文受版权保护。版权所有。