Effects of alfalfa leaf extracts and phenolic allelochemicals on early seedling growth and root morphology of alfalfa and barnyard grass

Chon, Sang‐Uk; Choi, Seongkyu; Jung, Sunyo; Jang, Hong-Gi; Pyo, Byoung-Sik; Kim, Sunmin

doi:10.1016/s0261-2194(02)00092-3

Cited by 133 publications

(91 citation statements)

References 16 publications

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“…Eighty grams of dried rhizomes, stems and leaves were respectively extracted by soaking in 1 l deionized water at 25 8C for 24 h in a shaker to give a concentration of 80 g dry tissue l À1 (g l À1 ). The extracts were respectively filtered through four layers of cheesecloth to remove the fiber debris, and centrifuged at 3000 rpm for 4 h (Chon et al, 2002). The supernatant was filtered again using a 0.2-mm filterware unit.…”

Section: Preparation Of Extractsmentioning

confidence: 99%

Allelopathic effect of ginger on seed germination and seedling growth of soybean and chive

Han

Pan

et al. 2008

Scientia Horticulturae

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Section: Preparation Of Extractsmentioning

confidence: 99%

Allelopathic effect of ginger on seed germination and seedling growth of soybean and chive

Han

Pan

et al. 2008

Scientia Horticulturae

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“…As raízes, normalmente, são mais sensíveis aos efeitos alelopáticos do que a germinação e o elongamento do hipocótilo (Chon et al 2002;Oliveira et al 2004). O extrato hexânico não afetou as plântulas desta espécie.…”

Section: Resultsunclassified

Potencial alelopático do extrato foliar de Annona glabra L. (Annonaceae)

et al. 2010

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Acta bot. bras. 24(3): 631-635. 2010. IntroduçãoOs herbicidas sintéticos têm-se mostrado cada vez menos efetivos na sua ação contra espécies infestantes de culturas, uma vez que o seu uso continuado tem levado à seleção de indivíduos cada vez mais resistentes a esses produtos (Gelmini et al. 2001). Este fenômeno tem levado à busca de novas alternativas, menos agressivas ao meio, como é o caso dos aleloquímicos naturais. Estes têm como vantagens a solubilidade em água, meia vida mais curta e geralmente não são considerados potencialmente tóxicos (Duke 2000).Os estudos químicos sobre as Annonaceae foram intensifi cados nos anos 80 e 90, principalmente pela procura de acetogeninas, uma classe de compostos com ampla atividade biológica. E antes disso, as pesquisas centraram suas investigações sobre os alcalóides isoquinolínicos. Foram catalogados cerca de 320 produtos secundários naturais provindos de 150 espécies desta família (Alali et al.1999).Estudos químicos sobre a Annona glabra L. confi rmaram a presença de grupos de substâncias com possível potencial alelopático, como monoterpenóides (Grayson 2000) e diterpenóides, isolados de diferentes partes da planta (Chang et al. 1998;Chen et al. 2000;Yang et al. 2003; Zhang et al. 2004 A. glabra é arbustivo-arbórea e cresce nas margens de rios, formando aglomerados. Este comportamento pode indicar que está ocorrendo uma forte competição com outras espécies ou ainda que existam processos alelopáticos envolvidos nesta distribuição. A partir dessas observações e dos testes preliminares realizados anteriormente, foram estabelecidos os seguintes objetivos: A) Avaliar o potencial alelopático de extratos foliares de A. glabra sobre a germinação e crescimento de plântulas de outras espécies, e sobre o crescimento de coleóptilos de trigo. B) Verifi car a presença de classes de compostos do metabolismo secundário nos extratos e frações estudados. This fraction was purifi ed by chromatographic column which resulted in fi ve fractions (A, B, C, D and E). Four concentrations (1000; 158; 79; 39.5 ppm) were prepared for each one. Effects caused by fractions were evaluated by wheat coleoptile tests. Fraction A stimulated elongation at all concentrations except 1000 ppm. Fraction B was inhibitory at all concentrations except for the smaller one. C was inhibitory only at the higher concentration and E did not cause a signifi cant effect.

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“…The result in this study is congruency with that of Turk and Tawaha (2002). During the soil sample collection process, a large amount of fibrous root and leaves residue was left in the soil after harvest (Chon et al, 2002;Chung & Miller, 1995;Hisashi et al, 2010). It is likely that the autotoxic compounds found in soils are derived partly from root exudates or fromplant tissue degradation.…”

Section: Discussionmentioning

confidence: 99%

“…One hundred and sixty g of dried chopped plant material was extracted by soaking in 1 L deionized water at 25 °C for 25 h in a shaker to give a concentration of 160 g dry tissue L -1 (0.16 g·mL -1 ). The extract was filtered through four layers of cheese cloth to remove fiber debris and centrifuged at 3000 rpm for 4 h (Chon et al, 2002). The supernatant was filtered through a 0-0.2 mm filter ware unit and filtrate (extract) was kept in a refrigerator at 4 °C until use.…”

Section: Plant Extractmentioning

confidence: 99%

Identification and Bioassay of Allelopathic Substances from Plant and Rhizosphere Soil Extracts of Adzuki Bean (Vigna angularis [Willd.] Ohwi & H. Ohashi.)

Song¹,

Zhang²,

Gao³

et al. 2016

JAS

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The soil sickness of Adzuki bean [Vigna angularis (Willd.) Ohwi & H. Ohashi] have been getting attention seriously under a continuously mono-cropping management-system in China. To investigate the allelopathy of rhizosphere soil and plant of Adzuki bean, culture dish and pot experiments were conducted. The compounds in the products were identified by High Performance Liquid Chromatography (HPLC).The aqueous extracts from rhizospheric soil and whole plant inhibited seed index (seed germination and seed potential) and plant growth under different degrees, and it showed concentration gradient effect on the inhibition of seed germination. Inhibition was stronger with increasment in extract concentration with the highest effect at 0.16 parts aqueous extract to 1 parts deionized water (0.16g·mL -1 ). The impact on growth varied among aqueous extracts from rhizospheric soil and the whole plant. Five phenolic compounds, cinnamic, phthalic, p-hydroxybenzoic, and isobutyricand glutaric acids, were detected from the rhizosphere soil and plant extract of Adzuki bean by HPLC method. Cinnamic, phthalic, and p-hydroxybenzoicacids were higher than that of the other phenolic acids. This result suggests that autotoxicity effects of phenolics on Adzuki bean probably happen in continuous mono-cropping systems.

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Effects of alfalfa leaf extracts and phenolic allelochemicals on early seedling growth and root morphology of alfalfa and barnyard grass

Cited by 133 publications

References 16 publications

Allelopathic effect of ginger on seed germination and seedling growth of soybean and chive

Allelopathic effect of ginger on seed germination and seedling growth of soybean and chive

Potencial alelopático do extrato foliar de Annona glabra L. (Annonaceae)

Identification and Bioassay of Allelopathic Substances from Plant and Rhizosphere Soil Extracts of Adzuki Bean (Vigna angularis [Willd.] Ohwi & H. Ohashi.)

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