Yu Yi, Du Yalei, Dong Jiajia, Yin Zhigang, Chen Peiyu, Cao Lingling, Yan Zhiqiang
School of Life Sciences, Nanyang Normal University, Nanyang 473061, China.
Nanyang Academy of Sciences, Nanyang 473000, China.
Plants (Basel). 2025 May 22;14(11):1577. doi: 10.3390/plants14111577.
Pamp., an elegant ornamental tree that graces early spring landscapes, has flower buds that are widely used as Traditional Chinese Medicine 'Xin Yi'. In this study, the phytotoxic effects of aqueous extracts derived from tepal litter (EMT) and bract litter (EMB) of flower were evaluated on six target plant species: L., L., , L., L. and . Secondary metabolites in EMT and EMB were tentatively characterized by liquid chromatography high-resolution mass spectrometry (LC-HRMS), and the joint action of allelochemicals was examined. Our findings revealed that both EMT and EMB significantly inhibited the seed germination and seedling growth of all target plants in a concentration-dependent manner. There were 120 and 98 secondary metabolites annotated by LC-HRMS in EMT and EMB, respectively. Among them, malic acid (MA) and citric acid (CA) with high relative contents showed synergistic phytotoxicities on seed germination and seedling growth of and . In summary, the flower litter of displayed significant allelopathic effects, and the synergistic effects of MA and CA probably played an important role.
辛夷是一种优雅的观赏树木，为早春景色增添光彩，其花芽被广泛用作中药“辛夷”。在本研究中，评估了从花朵的花被片凋落物（EMT）和苞片凋落物（EMB）中提取的水提取物对六种目标植物物种的植物毒性作用，这六种植物分别为[此处六种植物学名未给出，无法准确翻译]。通过液相色谱高分辨率质谱法（LC-HRMS）初步鉴定了EMT和EMB中的次生代谢产物，并研究了化感物质的联合作用。我们的研究结果表明，EMT和EMB均以浓度依赖的方式显著抑制了所有目标植物的种子萌发和幼苗生长。通过LC-HRMS在EMT和EMB中分别注释了120种和98种次生代谢产物。其中，相对含量较高的苹果酸（MA）和柠檬酸（CA）对[此处两种植物学名未给出，无法准确翻译]的种子萌发和幼苗生长表现出协同植物毒性。总之，辛夷的花朵凋落物表现出显著的化感作用，MA和CA的协同作用可能起到了重要作用。
