Allelopathic Effect of Different Concentrations of Aqueous Extracts of Nine Weeds Species on Seed Germination and Seedling Characteristics of Anise (Pimpinella anisum)

Представлены результаты изучения аллелопатической активности Quercus robur L., Acer platanoides L., Ulmus glabra Huds методом биотестирования. Выявлены различия воздействия аллелохимикатов на прорастание семян и развитие проростков тест-объекта в контролируемых условиях. Показана корреляция концентрации водных вытяжек листового опада и аллелопатического эффекта, оказываемого ими, которая подтверждена анализом функции средней. Here we present the results of studying the allelopathic activity of Quercus robur L., Acer platanoides L., Ulmus glabra Huds by biotesting. We revealed differences in the effect of allelochemicals on seed germination and the development of seedlings of the test object under controlled conditions. The correlation of the concentration of aqueous extracts of leaf litter and the allelopathic effect exerted by them is shown. The mentioned correlation is confirmed by the analysis of the average function.

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Phyto-allelopathic effect of different trees leaves’ aqueous extracts on seed germination and seedling growth of Echinochloa crus-galli (L.) Beauv

Indian Journal of Weed Science ◽

10.5958/0974-8164.2021.00060.5 ◽

2021 ◽

Vol 53 (3) ◽

pp. 318-323

Author(s):

Rohit Chhabra ◽

Rajni Sharma ◽

Tarundeep Kaur

Keyword(s):

Seed Germination ◽

Seedling Growth ◽

Allelopathic Effect ◽

Aqueous Extracts

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Allelopathic effect of aqueous extracts from agro-industrial residues of pecan nut [Carya illinoinensis (Wangenh) C. Koch] and pinhão (Araucaria angustifolia)

Revista Eletrônica Científica da UERGS ◽

10.21674/2448-0479.33.495-507 ◽

2017 ◽

Vol 3 (3) ◽

pp. 495-507 ◽

Cited By ~ 2

Author(s):

Voltaire SANT'ANNA ◽

Maico Ismael KLEIN ◽

Elaine BIONDO ◽

Eliane Maria KOLCHINSKI

Keyword(s):

Seed Germination ◽

Seed Coat ◽

Plant Root ◽

In Vitro Tests ◽

Allelopathic Effect ◽

Lettuce Seed ◽

Aqueous Extracts ◽

Industrial Residues ◽

Pecan Nutshell

Pinhão seed coat and pecan nutshell are residues widely produced in households and industries, which present great potential to be used as source of natural preservatives in the food chain. The objective of the present study is to evaluate the effectiveness of pinhão seed coat and pecan nutshell aqueous extracts in inhibiting seed germination. Extracts were obtained in concentration of 10g/L, 5g/L and 2.5g/L and tested against lettuce seed germination in vitro tests. The results show that both aqueous extract presented the significant (p<0.05) ability to inhibit seeds germination as well as the germination seed index, in relation to control experiments, when used in concentrations of up to 5g/L. Extracts did not interfere significantly (p>0.05) the germinated plant root size. Thus, aqueous extracts of agro-industrial residues from pinhão seed coat and pecan nutshell presents alellopathic activity, showing up as interesting alternative to be used as natural herbicide, also representing a way of solid waste management by industries and small farmers.

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Phytotoxicity of exotic plants on the physiological potential of seeds of native species of caatinga

Revista Agro mbiente On-line ◽

10.18227/1982-8470ragro.v12i2.4884 ◽

2018 ◽

Vol 12 (2) ◽

pp. 134 ◽

Cited By ~ 1

Author(s):

Silvana Fraga Silva ◽

Halina Stéffany Lopes Costa ◽

Jesimiel Silva Viana ◽

Ana Maria Oliveira Ferreira ◽

Diego Sousa Pereira ◽

...

Keyword(s):

Seed Germination ◽

Native Species ◽

Biodiversity Loss ◽

Exotic Plants ◽

Inhibitory Effect ◽

Allelopathic Effect ◽

Native Forest ◽

Aqueous Extracts ◽

Physiological Quality ◽

Invasive Exotic

The introduction of species is one of the major causes of biodiversity loss. Invasive exotic plants adapt, propagate and dominate, damaging both natural processes and native species. Thus, the objective was to evaluate the allelopathic effect of three exotic species in the caatinga, on the physiological quality of native forest seeds. Aqueous extracts of leaves of Azadirachta indica, Prosopis juliflora and Cryptostegia madagascariensis were tested to evaluate their effect on the seed germination and seedling vigor of Piptadenia moniliformis, Mimosa tenuiflora and Mimosa caesalpiniaefolia. Seed germination of M. tenuiflora was inhibited by the aqueous extracts of P. juliflora and A. indica in 100% and 42%, respectively, with a reduced GVI with the extracts of P. juliflora and C. madagascariensis. Regarding AEI, P. juliflora extract had positive effect on P. moniliformis seeds and negative on M. tenuiflora seeds, close to -1. A reduction in height of P. moniliformis was observed when the seedlings were in contact with the extracts of the invasive plants studied. For M. tenuiflora, the extract of P. juliflora prevented the formation of seedlings, and M. caesalpiniaefolia presented higher inhibitory effect with extracts of P. juliflora and A. indica. Therefore, M. tenuiflora showed to be sensitive to P. juliflora phytotoxicity.

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Allelopathic Interference of Ageratum conyzoides L. against Rice Varieties

Current Agriculture Research Journal ◽

10.12944/carj.8.2.01 ◽

2020 ◽

pp. 69-76

Author(s):

Bhawna Negi ◽

S.S Bargali ◽

Kiran Bargali ◽

Kavita Khatri

Keyword(s):

Seed Germination ◽

Seedling Growth ◽

Leaf Extract ◽

Water Soluble ◽

Allelopathic Effect ◽

Aqueous Extracts ◽

Ageratum Conyzoides ◽

Leaf Extracts ◽

Rice Varieties ◽

Seedling Length

Ageratum conyzoides L. is an invasive weed that has severely infested cultivated lands and interferes with the growth of crops. In this study aqueous extracts of 50 and 100% concentration were prepared from fresh and air dried plant parts (Leaves and roots) of A. conyzoides and their allelopathic effect was observed on seed germination and seedling growth of two rice varieties namely Sava and Geru. In Sava variety, a significant reduction in seed germination, seedling length and dry weight was recorded under dry leaf extract while under fresh leaf extract seed germination and seedling length was increased at 50% concentration as compared to control. In Geru variety both fresh and dry leaf extracts resulted in decreased seed germination and seedling growth with increasing concentration. Similar patterns were recorded for fresh and dry root extracts. The inhibitory effect of leaf extracts was more pronounced than root extract and overall dry aqueous extracts of leaf and root were more inhibitory than fresh aqueous extracts. Among varieties, Sava was least affected as compared to the Geru. This study indicated that A. conyzoides exert allelopathic effect towards rice crop by releasing water soluble phytochemicals.

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Allelopathic Effect against Seed Germination and Seedling Growth of Picea jezoensis of Leaf Aqueous Extracts from Competition Species

Journal of Korean Forestry Society ◽

10.14578/jkfs.2016.105.1.86 ◽

2016 ◽

Vol 105 (1) ◽

pp. 86-92

Author(s):

Sim Hee Han

Keyword(s):

Seed Germination ◽

Seedling Growth ◽

Allelopathic Effect ◽

Aqueous Extracts ◽

Picea Jezoensis

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Allelopathic Effects of Twelve Hedgerow Plant Species on Seed Germination and Seedling Growth of Wheat (Triticum astivum L.)

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.356-360.2767 ◽

2011 ◽

Vol 356-360 ◽

pp. 2767-2773 ◽

Cited By ~ 1

Author(s):

Yu Hong Wu ◽

Xu Cheng ◽

Qing Nian Cai ◽

Chao Wen Lin

Keyword(s):

Seed Germination ◽

Plant Species ◽

Seedling Growth ◽

Dry Weight ◽

Eriobotrya Japonica ◽

Allelopathic Effect ◽

Aqueous Extracts ◽

Vetiveria Zizanioides ◽

Toona Sinensis ◽

Citrus Reticulate

In laboratory bioassay, conducted to study the allelopathic influence of aqueous extracts (0, 2.5, 5.0, 7.5, 10.0% concentration) of twelve hedgerow plant species (Amorpha fruticosa L., Citrus reticulate Banco., Coronilla varia L., Eriobotrya japonica Thunb., Eulaliopsis binata Retz., Gynura bicolor DC., Hemerocallis citrine Baroni., Medicago sativa L., Morus alba L., Toona sinensis Roem., Vetiveria zizanioides L., Zanthoxylum schinifolium Sieb.) which planted in the purple hilly area of Sichuan basin in China was on the germination and seedling growth of wheat (Triticum astivum L.). At 10.0% concentration, The aqueous extracts of twelve hedgerow plant species significantly inhibited the seed germination and seedling growth of wheat except that A. fruticosa, E. binata and V. zizanioides extracts had no effect or slight inhibition on germination of wheat, but the degree of inhibition was species dependent. The allelopathic effect of aqueous extracts from hedgerow plants on wheat was maximum with G. bicolor, H. citrine, C. varia and M. sativa in terms of germination, and G. bicolor , M. sativa, M. alba and H. citrine in terms of shoot length, root length and dry weight, respecitively. The degree of inhibition increased with increase in concentration. Duplication of this work under field conditions is needed, for which the results of this study will form a valuable base.

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