Impact of Sunflower (Helianthus annuus L.) Extracts Upon Reserve Mobilization and Energy Metabolism in Germinating Mustard (Sinapis alba L.) Seeds

Kupidłowska, Ewa; Gniazdowska, Agnieszka; Stepien, J.; Corbineau, Françoise; Vinel, Dominique; Skoczowski, Andrzej; Janeczko, Anna; Bogatek, Renata

doi:10.1007/s10886-006-9183-z

Cited by 36 publications

(33 citation statements)

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“…Assim como os resultados da cultivar CD232, sementes de mostarda (Sinapis alba L.) também sofreram inibição na porcentagem de germinação quando submetidas ao extrato aquoso da parte aérea do girassol (KUPIDLOWSKA et al, 2006). Para a cultivar CD213RR (soja transgênica) foi observada diferença significativa na variável porcentagem de germinação entre as sementes da testemunha e as submetidas à maior concentração do extrato aquoso de girassol (100%), coincidindo com o maior tempo médio de germinação.…”

Section: Resultsunclassified

“…Entretanto, alguns estudos demonstram esta mesma atividade alelopática inibitória do girassol sobre espécies vegetais cultivadas como a mostarda (Sinapis alba L.), trigo (Triticum spp. ), sorgo (Sorghum bicolor L. Moench), ressaltando a importância de mais estudos quanto à fitotoxidade do girassol para sua indicação em sistemas de rotação e sucessão de culturas (KUPIDLOWSKA et al, 2006;BERNAT et al, 2004).…”

Section: Introductionunclassified

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Efeito alelopático do extrato aquoso de folhas de girassol sobre a germinação de soja e picão-preto

et al. 2010

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ResumoO objetivo deste trabalho foi avaliar o efeito alelopático do extrato aquoso de folhas frescas de girassol sobre a germinação das sementes e desenvolvimento inicial das plântulas das cultivares de soja (Glycine max (L.) Merrill) convencional (CD232), transgênica (CD213RR) e uma de suas invasoras, o picão preto (Bidens pilosa L.). Os experimentos foram realizados no Laboratório de Fisiologia Vegetal da Universidade Estadual do Oeste do Paraná no ano de 2007. As folhas de girassol colhidas na época da floração foram trituradas com o auxílio de um liquidificador na proporção de 200g/1L de água destilada resultando no extrato bruto (100%). A partir do extrato bruto foram feitas as diluições de 80%, 60%, 40% e 20%, sendo utilizado como testemunha apenas água destilada. Após análise estatística (Tukey 5% de probabilidade), pode-se verificar que o extrato aquoso das folhas de girassol influenciou as variáveis analisadas para a soja cultivares CD323 e CD213RR, principalmente nas concentrações de 60%, 80% e 100%. As sementes de picão preto tiveram a porcentagem de germinação totalmente inibida quando aplicado o extrato aquoso a 40%, indicando que a palhada de girassol poderia servir como um herbicida natural, porém estudos em condições de campo devem ser realizados para a comprovação deste efeito. Palavras-chave: Helianthus annus L, alelopatia, Glycine max (L.) Merrill, Bidens pilosa L. AbstractThe aim of this work was to evaluate the allelopathic effect of water extract from sunflower fresh leaves on the germination and initial development of conventional and transgenic soybean cultivars, and of the invasive hairy beggartick (Bidens pilosa L.). Experiments were carried out at Laboratory of Plant Physiology, Universidade Estadual do Oeste do Paraná, in 2007. Fresh leaves from sunflower were ground in a blender at the proportion 200g/1L distilled water, resulting in crude extract (100%), in which pH was measured. Dilutions of 80%, 60%, 40% and 20% were done from the crude extract, and only distilled water was used as control. Statistical analysis (Tukey 5% probability) indicated that only the highest extract concentrations (60%, 80% and 100%) influenced the analyzed parameters for conventional and transgenic soybean. Beggartick seeds, however, had germination percentage completely inhibited when 40% water extract was applied, which indicates that sunflower straw could be used as a natural herbicide. Nevertheless, field studies must be carried out to prove such effect.

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Section: Resultsunclassified

Section: Introductionunclassified

Efeito alelopático do extrato aquoso de folhas de girassol sobre a germinação de soja e picão-preto

et al. 2010

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“…Leaf powder (10 g dry weight [DW]) was extracted for 24 hr in 100 ml of distilled water at 20°C. The obtained 10% (w/v) extract was filtered through filter paper and used as a source of phytotoxins Kupidłowska et al, 2006).…”

Section: Methodsmentioning

confidence: 99%

Induction of Oxidative Stress by Sunflower Phytotoxins in Germinating Mustard Seeds

et al. 2007

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The aim of this study was to investigate the phytotoxic effect of sunflower on physiological and biochemical processes during germination of mustard seeds (Sinapis alba L. cv. Nakielska). To exclude the involvement of osmotic stress in seed reaction to phytotoxic compounds, we compared the effect of 10% (w/v) water extract from sunflower (Helianthus annuus L. cv. Ogrodowy) leaves and 28.4% (w/v) polyethylene glycol (PEG) 8000 solution characterized by an equal Y =−1 MPa. We evaluated (1) the amount of hydrogen peroxide (H 2 O 2 ); (2) activities of antioxidant enzymes: superoxide dismutase, catalase, and glutathione reductase; (3) membrane permeability; and (4) level of malondialdehyde (MDA). Both, sunflower compounds and PEG solutions inhibited mustard seed germination, but only phytotoxins caused an increase in the cell membrane permeability, MDA level, H 2 O 2 concentration, and alterations in activities of antioxidant enzymes. Our results demonstrate that despite the activation of the antioxidant system by sunflower phytotoxins, reactive oxygen species accumulation caused cellular damage, which resulted in the decrease of germinability and gradual loss of seed vigor. It seems that the negative effect of sunflower on germination of mustard seeds is mostly because of its toxicity and not to its contribution to osmotic potential.

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“…Undisturbed reserve mobilization is an important requirement for germination during the catabolic process just after liquid imbibition (Kupidłowska et al 2006). Rudrappa et al (2007) found that the root-secreted allelochemicals from P. australis deployed a reactive oxygen species (ROS) that is responsible for stress conditions on the affected plant.…”

Section: Introductionmentioning

confidence: 99%

Phytotoxicity induced by Phragmites australis: an assessment of phenotypic and physiological parameters involved in germination process and growth of receptor plant

Uddin

Robinson

Caridi

2013

Journal of Plant Interactions

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This study investigated the possible phytotoxicity induced by Phargmites australis on phenotypic and physiological parameters of recipient plants with identification of major inhibitors in the donor plant. This was achieved using aqueous extracts of different organs and root exudates of P. australis in laboratory and greenhouse experiments with Lactuca sativa as the model test plant. The observed reduced liquid imbibition and altered resource mobilization in seeds of L. sativa, in particular an insufficient carbohydrate supply, demonstrated that the onset of germination might be negatively affected by phytotoxicity. Dose-response studies pointed out that oxidative stress through reactive oxygen species production could potentially cause the observed germination and seedling growth reductions. The osmotic effects by mannitol solution on germination as well as growth and physiology at a level of (0.57 and (0.45 bar, respectively, demonstrated that the results from aqueous plant extracts were partially induced by the osmotic potential on and above those levels. Overall, the relative strength of inhibition on measured parameters was the highest in leaf extract, followed by rhizome, root, stem, and inflorescence. Root exudates of P. australis also had negative impacts by reducing germination and growth of plant. High-performance liquid chromatography (HPLC) analysis revealed gallic acid, a potent phytotoxin, as a major compound with an order of leaf ! inflorescence ! rhizome !root ! stem.

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Impact of Sunflower (Helianthus annuus L.) Extracts Upon Reserve Mobilization and Energy Metabolism in Germinating Mustard (Sinapis alba L.) Seeds

Cited by 36 publications

References 36 publications

Efeito alelopático do extrato aquoso de folhas de girassol sobre a germinação de soja e picão-preto

Efeito alelopático do extrato aquoso de folhas de girassol sobre a germinação de soja e picão-preto

Induction of Oxidative Stress by Sunflower Phytotoxins in Germinating Mustard Seeds

Phytotoxicity induced by Phragmites australis: an assessment of phenotypic and physiological parameters involved in germination process and growth of receptor plant

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