Bonato Bianca, Bennett Tom, Cannizzo Emanuele, Avesani Sara, Guerra Silvia, Castiello Umberto
Department of General Psychology, University of Padova, Padova, Italy.
Faculty of Biological Science, University of Leeds, Leeds, UK.
Plant Signal Behav. 2025 Dec;20(1):2506556. doi: 10.1080/15592324.2025.2506556. Epub 2025 May 19.
Plants, though sessile, can detect and respond to their neighbors through chemical signals such as strigolactones (SLs). We investigated how SL synthesis and perception affect the climbing behavior of by analyzing wild-type plants and two SL-related mutants- (SL-deficient) and (SL-insensitive) - grown either alone or paired with a plant of a different genotype but of the same genetic background. Using 3D kinematic analysis, we quantified the circumnutation and attachment dynamics. Our results show that social context significantly modulated climbing behavior. mutants, although unable to grasp the support, showed increased movement velocity in social conditions, suggesting enhanced exploratory behavior. In contrast, mutants exhibited slower, disoriented movements when paired, indicating impaired neighbor perception. Wild-type plants successfully grasped the support in all conditions but altered their behavior socially, increasing movement velocity with a more careful approaching phase. These results show that SL-mediated signaling, through both emission and perception, shapes context-dependent climbing strategies in pea plants.
植物虽然固着生长，但能够通过独脚金内酯（SLs）等化学信号检测并对邻居做出反应。我们通过分析野生型植物以及两个与SL相关的突变体——（缺乏SL）和（对SL不敏感）——来研究SL的合成和感知如何影响豌豆的攀爬行为，这些突变体单独生长或与具有相同遗传背景但不同基因型的植物配对生长。通过三维运动学分析，我们量化了植物的回旋转头运动和附着动态。我们的结果表明，社交环境显著调节了攀爬行为。突变体虽然无法抓住支撑物，但在社交环境中显示出运动速度增加，表明探索行为增强。相比之下，突变体在配对时表现出较慢且方向紊乱的运动，表明对邻居的感知受损。野生型植物在所有条件下都能成功抓住支撑物，但在社交环境中改变了它们的行为，在更谨慎的接近阶段增加了运动速度。这些结果表明，通过释放和感知，SL介导的信号传导塑造了豌豆植株中依赖环境的攀爬策略。
