Abstract Herbivores reduce plant productivity by removing part of the assimilation surface. Also, they can alter plant traits that affect plant–pollinator interactions and reproductive success. The objective of this study was to evaluate the impact of defoliation by sawfly (Caliroa cerasi) larvae on fruit production and quality in three cultivars of sweet cherry (Prunus avium). We hypothesized that the fruit production and quality is reduced as a consequence of changes in the allocation of resources within the plant in response to partial leaf removal during the previous year. Number of flowers per branch meter was higher in infested trees than in non-infested trees, while the number of fruits per branch meter was similar due to fruit abortion in all cultivars. Fruit quality was significantly affected by herbivory in different traits depending on cultivar. Infested Lapins and Van trees had significantly lower soluble solid content than non-infested trees. Titratable acidity was higher and ripening index was lower in infested Bing and Lapins trees than non-infested trees. Infested Van trees also exhibited a significant decrease in equatorial diameter and fresh fruit weight as well as pulp fresh weight and dry weight of seed compared to non-infested trees. Overall our study highlights that the direct impact of herbivores at leaf level has lagged effects on productivity in terms of fruit and seed quality in the year following the leaf damage.

中文翻译：

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锯蝇叶食草对樱桃树生殖器官的滞后影响：花卉生产的过度补偿降低了果实和种子的质量

摘要 食草动物通过去除部分同化表面来降低植物生产力。此外，它们可以改变影响植物 - 传粉媒介相互作用和繁殖成功的植物性状。本研究的目的是评估锯蝇（Caliroa cerasi）幼虫落叶对三种甜樱桃（Prunus avium）品种果实产量和品质的影响。我们假设水果产量和质量下降是由于植物内资源分配发生变化以响应前一年部分叶子去除的结果。受侵染的树木每枝米的花数高于未受侵染的树木，而由于所有品种的落果，每枝米的果实数相似。果实品质受食草性状的显着影响，取决于品种。受侵染的 Lapins 和 Van 树的可溶性固体含量明显低于未受侵染的树木。与未受侵染的树木相比，受侵染的 Bing 和 Lapins 树的可滴定酸度更高，成熟指数更低。与未受侵染的树木相比，受侵染的 Van 树还表现出赤道直径和鲜果重以及果肉鲜重和种子干重的显着降低。总体而言，我们的研究强调，草食动物在叶片水平上的直接影响对叶片损伤后一年的果实和种子质量生产力的影响滞后。与未受侵染的树木相比，受侵染的 Bing 和 Lapins 树的可滴定酸度更高，成熟指数更低。与未受侵染的树木相比，受侵染的 Van 树还表现出赤道直径和鲜果重以及果肉鲜重和种子干重的显着降低。总体而言，我们的研究强调，草食动物在叶片水平上的直接影响对叶片损伤后一年的果实和种子质量生产力的影响滞后。与未受侵染的树木相比，受侵染的 Bing 和 Lapins 树的可滴定酸度更高，成熟指数更低。与未受侵染的树木相比，受侵染的 Van 树还表现出赤道直径和鲜果重以及果肉鲜重和种子干重的显着降低。总体而言，我们的研究强调，草食动物在叶片水平上的直接影响对叶片损伤后一年的果实和种子质量生产力的影响滞后。