Department of Plant Biology and Soil Science, Faculty of Biology, University of Vigo, Campus Lagoas-Marcosende, 36310 Vigo, Spain.
CITACA, Agri-Food Research and Transfer Cluster, Campus da Auga, University of Vigo, 32004 Ourense, Spain.
Biomolecules. 2021 Feb 5;11(2):233. doi: 10.3390/biom11020233.
The elimination of broadleaf weeds from agricultural fields has become an urgent task in plant and environment protection. Allelopathic control is considered a potential approach because of its exclusive and ecological safety measures. Plant secondary metabolites also called allelochemicals are released from plant leaves, roots, stem, bark, flowers and play significant roles in soil rhizosphere signaling, chemical ecology, and plant defense. The present study was carried out to evaluate the impact of two allelochemicals; ferulic acid (FA) and -hydroxybenzoic acid (pHBA) on photosynthetic characteristics; F/F: efficiency of photosystem II photochemistry in the dark-adapted state; ΦPSII: photosynthetic quantum yield; NPQ, non-photochemical quenching; qP, photochemical quenching, and photon energy dissipation (1-qP)/NPQ in following 6 days exposure. seedlings were grown in perlite culture, irrigated with Hoagland solution and treated with allelopathic compounds FA and pHBA and were evaluated against the photosynthetic attributes. Both compounds behaved as potent inhibitors of photosynthetic traits such as F/F, ΦPSII, qP, and NPQ in . Photon energy dissipation (1-qP)/NPQ increased significantly from days 3 to 6. Higher dissipation of absorbed energy indicates the inactivation state of reaction centers and their inability to effectively use the absorbed energy in photosynthesis. These results indicated the potential allelopathic application of FA and pHBA for control of broadleaf weed, .
从农田中消除阔叶杂草已成为植物和环境保护的一项紧迫任务。由于具有排他性和生态安全性措施，化感控制被认为是一种潜在的方法。植物次生代谢物也称为化感物质，从植物的叶子、根、茎、树皮、花中释放出来，在土壤根际信号转导、化学生态学和植物防御中发挥着重要作用。本研究旨在评估两种化感物质；阿魏酸（FA）和-羟基苯甲酸（pHBA）对光合作用特性的影响；F/F：暗适应状态下光系统 II 光化学的效率；ΦPSII：光合作用量子产率；NPQ，非光化学猝灭；qP，光化学猝灭，以及光子能量耗散（1-qP）/NPQ 在 6 天暴露后的变化。 幼苗在珍珠岩培养中生长，用 Hoagland 溶液灌溉，并用化感化合物 FA 和 pHBA 处理，以评估其对光合作用属性的影响。这两种化合物都表现出对光合作用特征的强烈抑制作用，如 F/F、ΦPSII、qP 和 NPQ。 光子能量耗散（1-qP）/NPQ 从第 3 天到第 6 天显著增加。吸收能量的更高耗散表明反应中心失活状态及其无法有效地将吸收的能量用于光合作用。这些结果表明 FA 和 pHBA 具有控制阔叶杂草的潜在化感应用。
