Defalque Corentin, Laeremans Joy, Drugmand Jonathan, Tcheutchoua Chanceline Fopessi, Meng Yu, Zhou Meiliang, Zhang Kaixuan, Quinet Muriel
Earth and Life Institute-Agronomy, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium.
Country College of Landscape Architecture and Tourism, Hebei Agricultural University, Baoding 071001, China.
Plants (Basel). 2025 Jan 4;14(1):131. doi: 10.3390/plants14010131.
As a result of climate change, temperate regions are facing the simultaneous increase in water and heat stress. These changes may affect the interactions between plants and pollinators, which will have an impact on entomophilous crop yields. Here, we investigated the consequences of high temperatures and water stress on plant growth, floral biology, flower-reward production, and insect visitation of five varieties of common buckwheat (), an entomophilous crop of growing interest for sustainable agriculture. The plants were grown under two temperature regimes (21 °C/19 °C and 28 °C/26 °C, day/night) and two watering regimes (well-watered and water-stressed). Our results showed that the reproductive growth was more affected by drought and high temperatures than was the vegetative growth, and that combined stress had more detrimental effects. However, the impact of drought and high temperatures was variety-dependent. Drought and/or high temperatures reduced the number of open flowers per plant, as well as the floral resources (nectar and pollen), resulting in a decrease in pollinator visits, mainly under combined stress. Although the proportion of Hymenoptera visiting the flowers decreased with high temperatures, the proportion of Diptera remained stable. The insect visiting behavior was not strongly affected by drought and high temperatures. In conclusion, the modification of floral display and floral resources induced by abiotic stresses related to climate change alters plant-pollinator interactions in common buckwheat.
由于气候变化，温带地区正面临水分和热胁迫同时增加的情况。这些变化可能会影响植物与传粉者之间的相互作用，进而对虫媒作物的产量产生影响。在此，我们研究了高温和水分胁迫对五种普通荞麦（一种对可持续农业日益重要的虫媒作物）的植物生长、花生物学、花部报酬产生以及昆虫访花的影响。这些植物在两种温度条件（21 °C/19 °C和28 °C/26 °C，日/夜）和两种浇水条件（充分浇水和水分胁迫）下生长。我们的结果表明，生殖生长比营养生长更容易受到干旱和高温的影响，并且复合胁迫具有更有害的影响。然而，干旱和高温的影响因品种而异。干旱和/或高温减少了单株开放花朵的数量以及花部资源（花蜜和花粉），导致传粉者访花减少，主要是在复合胁迫下。尽管随着温度升高，访花的膜翅目昆虫比例下降，但双翅目的比例保持稳定。昆虫的访花行为并未受到干旱和高温的强烈影响。总之，与气候变化相关的非生物胁迫所导致的花展示和花部资源的改变，改变了普通荞麦中植物 - 传粉者的相互作用。
