In Vitro antifungal potency of plant extracts against five phytopathogens

Tapwal, Ashwani; Nisha, .; Garg, Shipra; Gautam, Nandini; Kumar, Rajesh

doi:10.1590/s1516-89132011000600003

Cited by 70 publications

(50 citation statements)

References 10 publications

(10 reference statements)

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“…The negative influence of the extracts of purple nutsedge and slender amaranth on maize root growth has also been reported in other studies (Hamayun et al, 2005;Tabrizi & Yarnia, 2011). The shoot of guinea-hen weed accumulates a great quantity of allantoin (Sousa et al, 1990), a nitrogen-rich compound that plays an important role in the assimilation, metabolism, transport, and storage of N in plants (Smith & Atckins, 2002).…”

Section: Resultssupporting

confidence: 52%

“…The production of RDM increased in NM plants an it was only influenced by the slender amaranth extract, unlike that observed by Anaya et al (1987), and Tabrizi & Yarnia (2011). However, the beneficial effect of the slender amaranth extract on RDM of NM plants was associated with a lower investment in SDM formation.…”

Section: Resultsmentioning

confidence: 56%

“…Negative responses associated with allelochemicals produced by guinea-hen weed and slender amaranth are common (Pérez-Leal et al, 2005;Tabrizi & Yarnia, 2011). Purple nutsedge is a species with highallelopathic potential; several reports show its negative action on seed germination and initial growth of maize seedlings (Hamaiyn et al, 2005) and other Poaceae species, as well as on grain production (Silva et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the direct influence on root growth, allelochemicals interfere with the physiological processes of plants, such as nutrient uptake and photosynthesis, which affects the regulation of arbuscular mycorrhizal symbiosis. Several allelopathic substances have a defense function against pathogens, such as fungi (Tapwal et al, 2011), without necessarily differentiating among functional and taxonomic groups.…”

Section: Introductionmentioning

confidence: 99%

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Growth and mycorrhizal colonization of maize plants treated with aqueous extracts from nonmycorrhizal weeds

Melo

Carrenho

2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate the influence of aqueous extracts of nonmycorrhizal weedy species on dry matter accumulation and assimilate partitioning of maize plants, with or without Cetraspora pellucida inoculation. The experiment was carried out in pots, in a completely randomized design, in a 5x2 factorial arrangement consisting of four plant extracts (purple nutsedge, guinea-hen weed, slender amaranth, and knotweed), a control irrigated with water, and two conditions (mycorrhizal and nonmycorrhizal maize plants), with four replicates of each treatment. Plants were irrigated with aqueous extracts diluted at 15%. Root colonization (RC), shoot dry matter (SDM), root dry matter (RDM), and RDM/ SDM were evaluated. Root colonization was not influenced by the extracts, and ranged from 41.5 to 65.2%. Shoot dry matter of mycorrhizal (AM) and nonmycorrhizal (NM) plants was not influenced by the extracts; however RDM showed varying responses. Mycorrhization favored the production of RDM, and increased plant sensitiveness to the extracts. Guinea-hen weed extract increased RDM of AM plants, while the other extracts inhibited it. In NM plants, the production of RDM was benefited by slender amaranth extract, to the detriment of SDM. Mycorrhizal and nonmycorrhizal maize plants respond differently to aqueous extracts of nonmycorrhizal weeds.Index terms: Zea mays, Amaranthus viridis, Cyperus rotundus, Petiveria alliacea, Polygonum ferrugineum, allelopathy. Crescimento e colonização micorrízica de plantas de milho tratadas com extratos de plantas infestantes não micorrízicasResumo -O objetivo deste trabalho foi avaliar a influência de extratos aquosos de plantas invasoras não micorrízicas sobre o acúmulo de matéria seca e sobre a partição de assimilados de plantas de milho com inoculação ou não de Cetraspora pellucida. O experimento foi conduzido em vasos, em um delineamento inteiramente casualizado, com arranjo fatorial 5x2 que consistiu de quatro extratos vegetais (tiririca, guiné, caruru, erva-de-bicho), um controle irrigado com água e duas condições (plantas de milho micorrizadas e não micorrizadas), com quatro repetições de cada tratamento. As plantas foram irrigadas com extratos aquosos diluídos a 15%. Avaliaram-se: a colonização radical (CR), a matéria seca da parte aérea (MSPA), a matéria seca das raízes (MSR) e MSR/MSPA. A colonização da raízes não foi influenciada pelos extratos, tendo variado de 41,5 a 65,2%. A matéria seca da parte aérea das plantas micorrizadas (MA) e não micorrizadas (NM) não foi influenciada pelos extratos; no entanto, a MSR teve resposta diferenciada. A micorrização favoreceu a produção de MSR e aumentou a sensibilidade das plantas aos extratos. O extrato de guiné aumentou a MSR das plantas MA, e os outros extratos a inibiram. Em plantas NM, a MSR foi beneficiada pelo extrato de caruru, em detrimento da MSPA. Plantas de milho micorrizadas e não micorrizadas respondem diferentemente aos extratos aquosos de plantas invasoras não micorrizadas.

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Section: Resultssupporting

confidence: 52%

Section: Resultsmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Growth and mycorrhizal colonization of maize plants treated with aqueous extracts from nonmycorrhizal weeds

Melo

Carrenho

2017

Pesq. agropec. bras.

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“…An alternative strategy could be applied through the exploration of natural antimicrobial compounds from plant bark, stems, leaves, flowers and fruits (Ikram and Dawar, 2013;Silva et al, 2014;Javaid and Akhtar, 2015). These can act directly as pesticides or may provide structural lead for the development of pesticides (Kilani, 2006;Tapwal et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

ANTIFUNGAL ACTIVITY OF Cirsium arvense EXTRACTS AGAINST PHYTOPATHOGENIC FUNGUS Macrophomina phaseolina

et al. 2017

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-Leaves, stems, roots and inflorescence of the asteraceous weed Circium arvense were extracted in methanol for two weeks. Methanol was evaporated in a rotary evaporator. Different concentrations (1, 2, 3, 4 and 5%) of methanolic extracts were prepared, and their antifungal activities were studied against Macrophomina phaseolina, using malt extract broth as growth medium. In general, extracts of all plant parts showed antifungal activities to variable extents. The highest antifungal activity occurred due to methanolic extract of leaves, followed by stem and root extracts, resulting in 10-74%, 6-57% and 11-39% reduction in fungal biomass over control, respectively. Inflorescence extract showed the least antifungal activity, resulting in 2-30% reduction in fungal biomass over control. There was a linear and inverse relationship between extract concentrations and fungal biomass for extracts of all the four parts. GC-MS analysis showed that there were 10 compounds in most effective methanolic leaf extract. Among these, 10-octadecanoic acid, methyl ester (26.442%), 2H-1-benzopyran, 6,7-dimethoxy-2-2-dimethyl (20.195%), hexadecanoic acid, methyl ester (15.752%) and 9,12-octadecadienoic acid (Z,Z)-, methyl ester (12.628%) were predominant compounds in the extract that may be responsible for antifungal activity. This study concludes that methanolic leaf extracts of C. arvense can be used for the management of M. phaseolina. 2H-1-benzopirano, 6,7-dimetoxi-2-2-dimetil (20,195%), ácido hexadecanóico, éster de metilo (15,752%) e ácido 9-12-octadecadienóico (Z,Z)-, éster de metilo (12,628%) Keywords

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