Plant growth inhibitors (Proanthocyanidins) from Prunus armeniaca

Rawat, Mahiraj Singh; Pant, G.; Prasad, D.; Joshi, Rakesh Kumar; Pande, C. B.

doi:10.1016/s0305-1978(97)00080-x

Cited by 18 publications

(9 citation statements)

References 12 publications

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“…The reactivity of condensed tannins with proteins and formation of complexes has important nutritional and physiological consequences (Naczk et al, 1996;Hagerman et al, 1998). Proanthocyanidins may form complexes with proteins in the soil and influence N release (Howard & Howard, 1993;Hernes et al, 2001;Nagamitsu et al, 2003), form complexes with various enzymes (Chung et al, 1998;Bruyne et al, 1999), lead to antimicrobial and antiviral properties (Scalbert, 1992;Chung et al, 1993;Chang et al, 1994;Chung et al, 1995a, b), retardation in plant germination, growth and yield (Rawat et al, 1998), and interference with the domestic animals' digestion and/or absorption (Chung et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Tannins and nitrogen dynamics in mangrove leaves at different age and decay stages (Jiulong River Estuary, China)

et al. 2007

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Changes in the total phenolics, condensed tannins (CT), protein-precipitable phenolics content and protein precipitation capacity were determined on mangrove leaves representing a range of maturation and senescence in the Jiulong River Estuary, Fujian, China. The results showed that the total phenolics, extractable condensed tannins, total condensed tannins, protein-precipitable phenolics content and protein precipitation capacity in young leaves were higher than those in mature and senescent leaves. With leaf maturation and senescence, total pehnolics decreased. The rapid loss of phenolics observed following senescence and abscission can be ascribed to leaching and degradation. Protein-bound CT and fibre-bound CT tended to increase with leaf maturity, and decreased with senescence. Protein-bound CT and fibre-bound CT increased with leaf decomposition, with CT binding more strongly to protein than to fibre. The increases in nitrogen contents and ash free caloric values, and declines in total phenolics and total condensed tannins of mangrove leaf litter suggests that partially decomposed mangrove detritus is a palatable heterotrophic substrate, and thus may be an important source of matter and energy for the estuarine food web

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Section: Introductionmentioning

confidence: 99%

Tannins and nitrogen dynamics in mangrove leaves at different age and decay stages (Jiulong River Estuary, China)

et al. 2007

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“…The reactivity of condensed tannins with proteins and formation of complexes has important nutritional and physiological consequences (Naczk et al 1996;Hagerman et al 1998). Proanthocyanidins may form complexes with proteins in the soil and influence N release (Howard and Howard 1993;Hernes et al 2001;Nagamitsu et al 2003), form complexes with various enzymes (Chung et al 1998;Bruyne et al 1999), lead to antimicrobial and antiviral properties (Scalbert 1992;Chung et al 1993Chung et al , 1995aChang et al 1994), retard plant germination, growth and yield (Rawat et al 1998), and interfere with the domestic animal's digestion and/or absorption (Chung et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Tannin Dynamics of Propagules and Leaves of Kandelia candel and Bruguiera gymnorrhiza in the Jiulong River Estuary, Fujian, China

et al. 2006

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Changes in the total phenolics, condensed tannins (CT), protein-precipitable phenolics content and protein precipitation capacity were determined on a series of mangrove leaves from two true viviparous mangrove species (Kandelia candel and Bruguiera gymnorrhiza) at various stages of development and decomposition in the Jiulong River Estuary, Fujian, China. Similar measurements were also done for the propagules at different developmental stages. The results showed that the total phenolics, extractable condensed tannins, total condensed tannins, proteinprecipitable phenolics content and protein precipitation capacity in young leaves were higher than those in mature and senescent leaves. Tannin dynamics during leaf decomposition varied with species, and the rapid loss of phenolics observed during decomposition can be ascribed to leaching and degradation. Protein-bound CT and fibre-bound CT tended to increase with leaf decomposition, with CT binding more strongly to protein than to fibre. Protein-bound CT was higher than fibre-bound CT with the exception of mature leaves. Total phenolics, extractable CT and proteinprecipitable phenolics contents in flower tissues were relatively lower than those in hypocotyls at different developmental stages. Protein precipitation capacity fluctuated with the development of propagules. Increases in nitrogen in decaying litter, and declines in contents of total phenolics and total condensed tannins of detritus support the general conclusion that decomposing mangrove detritus can be a more palatable heterotrophic substrate than living leaves.

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“…A maioria dos trabalhos relata que os efeitos dos compostos alelopáticos se relacionam aos processos fisiológicos da planta receptora e de maneira geral, agem como inibidores da germinação e do crescimento (Juan Jiménez-Osornio et al 1996;Viles & Reese 1996;Rawat et al 1998;Vaccarini et al 1999). Porém, alguns trabalhos demonstraram que estes compostos podem atuar como promotores de crescimento (Yamada et al 1995;Yokotani-Tomita et al 1998).…”

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Atividade alelopática de extratos aquosos de Aristolochia esperanzae O. Kuntze na germinação e no crescimento de Lactuca sativa L. e Raphanus sativus L.

2004

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RESUMO -(Atividade alelopática de extratos aquosos de Aristolochia esperanzae O. Kuntze na germinação e no crescimento de Lactuca sativa L. e Raphanus sativus L.). O objetivo deste trabalho foi analisar os efeitos de extratos aquosos de diferentes órgãos de Aristolochia esperanzae na germinação e no crescimento de alface e rabanete. Todos os extratos preparados obedeceram à proporção de 100g de material vegetal fresco para 300mL de água destilada, que produziu o extrato considerado 100% concentrado. A partir deste, foram feitas diluições com água destilada para 75, 50 e 25%. Nos testes de germinação foram avaliados os efeitos dos extratos obtidos de folha, caule, raiz, fruto e flor a 100, 75, 50 e 25%. Para o teste de crescimento foram utilizados extratos de folha, caule e raiz na concentração de 100 e 50%. Nos testes de germinação foram utilizadas quatro repetições de 30 sementes distribuídas em placas de Petri forradas com duas folhas de papel de filtro umedecidas com 5 mL dos referidos extratos, secas durante 12h e reumedecidas com 4,5mL de água destilada. No primeiro teste avaliou-se a percentagem e a velocidade de germinação das sementes. No teste de crescimento, as sementes foram previamente germinadas (2-4mm de radícula) e depois transferidas para caixas plásticas contendo os substratos de papel de filtro e fibra de coco umedecidos com os respectivos extratos. Avaliou-se a altura da parte aérea, o comprimento radicular, a massa seca das plântulas e a presença de anormalidades nas plântulas. Os testes foram mantidos à temperatura constante de 27ºC. Através dos resultados obtidos pode-se concluir que os extratos de folha foram os que mais afetaram a percentagem de germinação e que todos os extratos e as diferentes concentrações retardaram a germinação de sementes de alface e de rabanete. Quanto ao teste de crescimento, podese verificar que os extratos de caule e de raiz causaram anormalidades nas plântulas. As plântulas crescidas no substrato papel de filtro apresentaram maior inibição do crescimento, em relação àquelas crescidas no substrato fibra de coco. A concentração dos extratos foi a principal responsável pelo estímulo ou inibição causada no crescimento das plântulas de alface e rabanete.Palvras-chave: alelopatia, Aristolochia, alface, rabanete ABSTRACT -(Allelopathic activity of aqueous extracts of Aristolochia esperanzae O. Kuntze in the germination and growth of Lactuca sativa L. and Raphanus sativus L.). This work analyzed the effects of aqueous extracts of Aristolochia esperanzae organs in the germination and initial growth of lettuce and radish. All the extracts were prepared using 100g of plant fresh material + 300mL of distilled water to produce the extract 100% concentrated. This extract was diluted with distilled water to produce a final concentrations of 75, 50 and 25%. The germination was evaluated by tests using the extracts of leaf, stem, root, fruit and flower, with concentration of 100, 75, 50, and 25%. In the seedlings growth, the extracts of leaf, stem, and root were used in the con...

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Plant growth inhibitors (Proanthocyanidins) from Prunus armeniaca

Cited by 18 publications

References 12 publications

Tannins and nitrogen dynamics in mangrove leaves at different age and decay stages (Jiulong River Estuary, China)

Tannins and nitrogen dynamics in mangrove leaves at different age and decay stages (Jiulong River Estuary, China)

Tannin Dynamics of Propagules and Leaves of Kandelia candel and Bruguiera gymnorrhiza in the Jiulong River Estuary, Fujian, China

Atividade alelopática de extratos aquosos de Aristolochia esperanzae O. Kuntze na germinação e no crescimento de Lactuca sativa L. e Raphanus sativus L.

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