Allelopathic effects of Koelreuteria integrifoliola leaf aqueous extracts on Lolium perenne related to mesophyll ultrastructural alterations and endogenous hormone contents

2021 ◽  
Vol 43 (9) ◽  
Author(s):  
Xia Zhang ◽  
Zhiwei Wang ◽  
Haiyun Li
Keyword(s):  
Lolium Perenne ◽  
Endogenous Hormone ◽  
Aqueous Extracts ◽  
Ultrastructural Alterations ◽  
Allelopathic Effects

scholarly journals Inhibitory Effects of Brassicaceae Cover Crop on Ambrosia artemisiifolia Germination and Early Growth

Plants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 794
Author(s):  
Maja Šćepanović ◽  
Marija Sarić-Krsmanović ◽  
Valentina Šoštarčić ◽  
Ema Brijačak ◽  
Josip Lakić ◽  
...  
Keyword(s):  
Cover Crops ◽  
Syringic Acid ◽  
Early Growth ◽  
Ambrosia Artemisiifolia ◽  
Aqueous Extracts ◽  
Inhibitory Effects ◽  
Weed Growth ◽  
Liquid Chromatography Tandem Mass ◽  
Allelopathic Effects ◽  
Vanilic Acid

Several cover crops (CCs) exert allelopathic effects that suppress weed growth. The aim of the present study was to evaluate the effects of aqueous extracts containing different concentrations [0, 0.5, 1, 2.5, 5, 7.5 and 10% (w/v)] of Brassicaceae CCs (Sinapis alba, Raphanus sativus, Camellina sativa) and of the CCs Fagopyrum esculentum and Guizotia abyssinica on germination and early growth of Ambrosia artemisiifolia L. The allelopathic effects were species and concentration-dependent. C. sativa, for example, caused the greatest potential to inhibit germination, shoot, radicle length and fresh seedling weight, whereas S. alba and R. sativus inhibited germination and early growth of A. artemisiifolia only at concentrations ≥7.5%. In contrast, no inhibition was observed when aqueous extracts of F. escultneum and G. abyssinica were added at any of tested concentration. Liquid chromatography-tandem mass spectrometry detected 15 phenolic compounds in Brassicaceae CCs with the highest content (µg/g) of vanillin (48.8), chlorogenic acid (1057), vanilic acid (79), caffeic acid (102.5) and syringic acid (27.3) in C. sativa. Our results suggest that C. sativa is the most allelopathic CCs and that the fruits of C. sativa are the plant organs richest in allelochemicals.

Allelopathic effects of weed spp on the root border cells of Fagopyrum tataricum (L.) Gaertn

2021 ◽  
Vol 52 (1) ◽  
pp. 85-102
Author(s):  
Y.Y. Xie ◽  
L.X. Yao ◽  
S. Wei ◽  
S.H. He ◽  
L. Chen ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Reactive Oxygen Species ◽  
Mitochondrial Membrane ◽  
Reactive Oxygen ◽  
Aqueous Extracts ◽  
Oxygen Species ◽  
Weed Species ◽  
Fagopyrum Tataricum ◽  
Bidens Pilosa ◽  
Allelopathic Effects

We studied the allelopathic effects of aqueous extracts of Galinsoga parviflora Cav., Chenopodium ambrosioides L., and Bidens pilosa L. weed species on the developmental characteristics of Tartary buckwheat RBCs. The increase in the concentration of aqueous extracts, there was increase in apoptosis rate and mucigel thickness of the RBCs, level of intracellular reactive oxygen species and nitric oxide, but decreased the mitochondrial membrane potential (P <0.05). The allelopathic effects of aqueous extracts of donor weed species on RBCs followed the order: C. ambrosioides > B. pilosa > G. parviflora. The increased levels of reactive oxygen species, nitric oxide and the reduced potential of mitochondrial membrane, further disrupted the homeostasis and normal metabolism of cells, thereby inducing the cell death. Among the three weed species, C. ambrosioides had the most significant impact

Identification of aqueous extracts from Artemisia ordosica and their allelopathic effects on desert soil algae

Chemoecology ◽  
2019 ◽  
Vol 29 (2) ◽  
pp. 61-71 ◽  
Author(s):  
Xiangjun Zhou ◽  
Yurui Zhang ◽  
Xiaoliang An ◽  
Roberto De Philippis ◽  
Xinyue Ma ◽  
...  
Keyword(s):  
Desert Soil ◽  
Aqueous Extracts ◽  
Soil Algae ◽  
Artemisia Ordosica ◽  
Allelopathic Effects

Inhibitory effect of aqueous extracts of Centaurea solstitialis subsp. schouwii on seed germination and growth of Sulla coronaria

Botany ◽  
2020 ◽  
Vol 98 (5) ◽  
pp. 273-281
Author(s):  
Chadlia Hachani ◽  
Mohammed S. Lamhamedi ◽  
Mejda Abassi ◽  
Zoubeir Béjaoui
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Inhibitory Effect ◽  
Centaurea Solstitialis ◽  
Aqueous Extracts ◽  
Linear Relationships ◽  
Allelopathic Effects ◽  
Anthropogenic Threats ◽  
Sulla Coronaria

Biodiversity has been confronted with anthropogenic threats and several natural threats such as biological invasions. The success of these invasions involves phytotoxic products released by invasive plants that can exhibit allelopathic effects on target species. Thus, aqueous extracts from different parts of the Mediterranean yellow star-thistle [Centaurea solstitialis subsp. schouwii (DC.) Gugler], were tested for their allelopathic effects on seed germination and seedling growth of Sulla coronaria (L.). Bioassays were conducted in vitro to test the effects of the aqueous extracts of shoot, basal and root parts of C. solstitialis subsp. schouwii at two different concentrations (50 g·L−1 and 10 g·L−1). The concentrations of total polyphenols, flavonoids, and tannins of the extracts were also evaluated. Our results showed inhibitory effects on the germination and seedling growth of S. coronaria seedlings, particularly with the extract form the basal part, reaching 84%. This study confirms the linear relationships between the allelopathic effects of C. solstitialis subsp. schouwii and the polyphenol and flavonoid contents. However, further experiments are needed under field conditions to confirm the results obtained under laboratory conditions.

Allelopathic effects of aqueous extracts from Artemisia ordosica on four associated herbaceous plants

2019 ◽  
Vol 39 (15) ◽  
Author(s):  
邓文红 DENG Wenhong ◽  
赵欣蕊 ZHAO Xinrui ◽  
张俊琦 ZHANG Junqi ◽  
郭惠红 GUO Huihong
Keyword(s):  
Herbaceous Plants ◽  
Aqueous Extracts ◽  
Artemisia Ordosica ◽  
Allelopathic Effects

scholarly journals Phytotoxicity of the extracts of Lonchocarpus muehlbergianus Hassl. (Fabaceae) leaflets and galls on seed germination and early development of lettuce

2008 ◽  
Vol 22 (4) ◽  
pp. 1095-1100 ◽  
Author(s):  
Denis Coelho de Oliveira ◽  
Geraldo Luiz Gonçalves Soares ◽  
Rosy Mary dos Santos Isaias
Keyword(s):  
Seed Germination ◽  
Trophic Levels ◽  
The Other ◽  
Distilled Water ◽  
Aqueous Extracts ◽  
Seedling Height ◽  
Gall Formation ◽  
Allelopathic Effects ◽  
Axis Length ◽  
Tissue Alterations

Galls induced by Euphalerus ostreoides (Hemiptera: Psyllidae) cause structural and chemical alterations on Lonchocarpus muehlbergianus leaflets. Healthy and galled leaflet tissues of this plant species are rich in secondary metabolites with potential allelopathic effects. This research compares the allelopathic effects of the aqueous extracts of L. muehlbergianus leaflets and galls on seeds and seedlings of Lactuta sativa, and evaluates the chemical impact produced by a gall-inducing insect on the other trophic levels associated with it. The extracts were obtained through static maceration in distilled water (5% p/v). The treatments consisted of aqueous crude extracts and those previously filtered in polyvinylpirrolidone (PVP). After seven days, seedling height was measured, and the radicles were fixed in FAA50 for anatomical analyses. Healthy leaflet and gall aqueous extracts, and those filtered in PVP, significantly inhibited seed germination, with no significant differences between the two groups. Treatments with aqueous extracts reduced seed germination speed and vegetative axis length. Plant tissue alterations confirm the phytotoxicity of allelochemical substances present in the extracts. The differences among the treatments indicated that gall formation altered L. muehlbergianus leaflet metabolism, and this could influence the other trophic levels associated with this gall inducing-host plant system.

scholarly journals Allelopathic Effects of Imperata Cylindrica Aqueous Extract on the Germination of Cucumis Sativus and Lolium Perenne

2020 ◽  
Vol 8 (6) ◽  
pp. 2503-2508
Keyword(s):  
Cucumis Sativus ◽  
Lolium Perenne ◽  
Dry Weight ◽  
Imperata Cylindrica ◽  
Allelopathic Effect ◽  
Aqueous Extracts ◽  
Inhibitory Effects ◽  
Weed Species ◽  
Mechanism Of Inhibition ◽  
Root And Shoot Length

In this study, the allelopathic effect of Imperata cylindrica has been investigated. Aqueous extracts of Imperata cylindrica were tested at concentrations of 31.25, 62.5, and 125 mg/ml to study different parameters on Cucumis sativus and Lolium perenne. Various factors were studied to determine the inhibition and growth of root and shoot length, percentage germination, and fresh and dry weight. Results indicated that the aqeous extract of Imperata cylindrica contain allelochemicals which may contribute to its invasiveness and extreme competitiveness. The results of this study show that Imperata cylindrica contains allelochemical compounds particularly in root and shoot extracts that might be the potential candidates for future investigations for the development of herbicides based on its secondary metabolites and their allelopathic inhibitory effects. Further research is needed to investigate the allelopathic effect of Imperata cylindrical aqueous extracts under field conditions against the associated weed species and elucidation of the mechanism of inhibition involved

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