Physiological and Biochemical Mechanisms Mediated by Allelochemical Isoliquiritigenin on the Growth of Lettuce Seedlings

Zhang, Shuang; Sun, Shiwei; Shi, Hailin; Zhao, Keliang; Wang, Jin; Liu, Yang; Liu, Xiaohong; Wang, Wei

doi:10.3390/plants9020245

Cited by 16 publications

(8 citation statements)

References 47 publications

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“…In this study, the effects of water soluble allelochemicals appear to alter a variety of morpho-physiological functions and significantly reduced the leaf fresh and dry biomass. Zhang et al [ 24 ], showed that allelochemical (isoliquiritigenin) in the concentrations ranged between 0.2–1.0 mM exhibited toxic impacts that decreased the lettuce seedling growth. However, the results were dose dependent.…”

Section: Discussionmentioning

confidence: 99%

Allelopathic Potential of Aqueous Extract from Acacia melanoxylon R. Br. on Lactuca sativa

Hussain

El‐Sheikh

Reigosa

2020

Plants

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We studied the polyphenol (phenolic compounds and flavonoids) composition and allelopathic effects of Acacia melanoxylon R. Br. aerial foliage aqueous extract (0%, 25%, 50%, 75% and 100%) on the seedling growth and plant biomass of the general biotest species, lettuce (Lactuca sativa). Mean leaf fresh weight, leaf dry weight, root fresh weight and root dry weight were decreased following exposure to Acacia aerial foliage, flowers aqueous extract (AFE) and phyllodes aqueous extract (APE) after 6 days. The reduction in plant dry biomass was more than 50% following treatment with AFE. The decrease in mean root length was approximately 37.7% and 29.20% following treatment with Acacia flowers extract (AFE) at 75% and 100% concentration, respectively. Root dry weight of L. sativa was reduced by both flowers and phyllodes extract. The reduction of protein contents in lettuce leaves following Acacia foliage extract proved that both AFE and APE exhibit polyphenols that causes the toxicity which led to decrease in leaf protein contents. High-Performance Liquid Chromatography (HPLC) was employed to analyze the A. melanoxylon flowers and phyllodes. A total of 13 compounds (accounting for most abundant compounds in flowers and phyllodes) include different flavonoids and phenolic compounds. The phytochemical compounds detected were: Gallic acid, protocatechuic acid, p-hydroxybenzoic acid, p-hydroxybenzaldehyde, vanillic acid, syringic acid, p-coumaric acid, and ferulic acid. The major flavonoid compounds identified include rutin, luteolin, apigenin, and catechin. Allelopathic effects of flower and phyllodes extracts from A. melanoxylon may be due to the presence of above compounds identified by HPLC analysis.

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Section: Discussionmentioning

confidence: 99%

Allelopathic Potential of Aqueous Extract from Acacia melanoxylon R. Br. on Lactuca sativa

Hussain

El‐Sheikh

Reigosa

2020

Plants

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“…Recent studies revealed that the generated ROS in receptor plants was involved in the phytotoxicity of several allelochemicals. [31][32][33][34][35][36] The results highlighted the essential role of ROS in allelochemical-induced stress in plants. In addition, allelochemicals also have the ability to arrest mitosis in plant cells.…”

Section: Discussionmentioning

confidence: 84%

“…They can arrest cells in all of the mitotic phases or sometimes only in the metaphase. [31][32][33]37 So the influence of mitosis of allelochemicals was also an important factor for the growth inhibition of plants. However, more studies will be needed to clarify the molecular target and the signal transportation pathway of a certain allelochemical.…”

Section: Discussionmentioning

confidence: 99%

Phytotoxic mechanism of allelochemical liquiritin on root growth of lettuce seedlings

Yan

Tan

Guo

et al. 2020

Plant Signaling & Behavior

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As the main active ingredient of the traditional Chinese medicine Glycyrrhiza uralensis Fisch, liquiritin has multiple biological activities, including anti-inflammatory, antihepatotoxicity, immune regulation, antivirus and anti-cancer. In addition, liquiritin has been recognized as an allelochemical that displays markedly inhibitory effects on the growth of target plants, G. uralensis and lettuce. However, its phytotoxic mechanism remains unknown. In the present study, the mode of action of liquiritin against root growth of lettuce seedling was researched. After treatments with liquiritin, the cell division in root tips of lettuce seedlings was partly arrested, and the cell viability and root vitality were obviously lost. At the same time, overproduction of reactive oxygen species (ROS), malondialdehyde (MDA) and proline (Pro) in lettuce seedlings were induced by liquiritin. The results indicated that the phytotoxic effects of liquiritin was probably dependent on the induction of ROS overproduction, resulting in membrane lipids peroxidation following with cell death and mitosis process disorder.

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“…The influence of ROS in receptor plants is found to be involved in the phytotoxic effects of allelochemicals in previous studies [15][16][17][31][32][33][34], indicating that ROS play essential roles in allelochemical-induced stress in plants. In this study, we found that the levels of O 2 − and H 2 O 2 in lettuce roots were gradually increased after treatments with acacetin with increasing concentrations, indicating that acacetin could efficiently induce the overproduction and accumulation of ROS in the target plant.…”

Section: Discussionmentioning

confidence: 93%

Phytotoxic Effects of Allelochemical Acacetin on Seed Germination and Seedling Growth of Selected Vegetables and Its Potential Physiological Mechanism

et al. 2022

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Acacetin is a naturally occurring flavonoid that displays multi-pharmacological activities, as well as phytotoxicity. In this study, seeds of four typical vegetables including lettuce (Lactuca sativa L.), radish (Raphanus sativus L.), onion (Allium cepa L.) and cucumber (Cucumis sativus L.) were selected to evaluate the phytotoxic effects of acacetin, and the model plant lettuce, which is also the most sensitive species to acacetin of the four vegetables, was used to research the phytotoxic mechanism of acacetin. Bioassays showed that the germination rate and germination potential of vegetable seeds were both decreased under a high concentration of acacetin. Acacetin displayed strong inhibitory effects on root growth, shoot growth and fresh weight of vegetable seedlings in a concentration dependent manner. After treatments with acacetin, the levels of O2−, H2O2, MDA, free proline and the number of dead cells in lettuce root tips were increased, while the mitosis index (MI) was decreased. These results indicated that acacetin could cause stress on lettuce seedlings and induce the accumulation of reactive oxygen species (ROS) in plant cells, leading to lipid peroxidation and then loss of cell viability and even cell death. Moreover, acacetin influenced the mitosis of the target plant, resulting in a decreased proportion of cells during the division phase. Together, acacetin showed strongly phytotoxic effects on vegetables, and the allelopathic activity mainly depended on the influence of ROS and mitosis of the receptor plant.

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Physiological and Biochemical Mechanisms Mediated by Allelochemical Isoliquiritigenin on the Growth of Lettuce Seedlings

Cited by 16 publications

References 47 publications

Allelopathic Potential of Aqueous Extract from Acacia melanoxylon R. Br. on Lactuca sativa

Allelopathic Potential of Aqueous Extract from Acacia melanoxylon R. Br. on Lactuca sativa

Phytotoxic mechanism of allelochemical liquiritin on root growth of lettuce seedlings

Phytotoxic Effects of Allelochemical Acacetin on Seed Germination and Seedling Growth of Selected Vegetables and Its Potential Physiological Mechanism

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