Effects of root exudates and aqueous root extracts of cucumber (Cucumis sativus) and allelochemicals, on photosynthesis and antioxidant enzymes in cucumber

Yu, Jing; Ye, Su Feng; Zhang, Ming Fang; Hu, Wen Hai

doi:10.1016/s0305-1978(02)00150-3

Cited by 265 publications

(185 citation statements)

References 33 publications

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“…2). Our data are consistent with those of Yu et al (2003), which showed that exposure of cucumber roots to phytotoxic compounds significantly increased SOD activity. An increased CAT activity in response to allelochemicals has also been demonstrated in germinating cucumber seeds treated by different benzoic acids (Maffei et al, 1999).…”

Section: Discussionsupporting

confidence: 92%

“…Although the role of the antioxidant system in plants in response to environmental stresses has received attention (Bowler et al, 1992;Scebba et al, 1998;Yu et al, 2003;Foyer and Noctor, 2005), our understanding about its putative involvement in response to phytotoxic agents is so far not well documented. The scavenging of the superoxide radical O ÁÀ 2 À Á is achieved through an upstream enzyme, superoxide dismutase (SOD), which catalyses the dismutation of O ÁÀ 2 À Á to hydrogen peroxide (H 2 O 2 ) and plays a role in protecting cells against the toxic effects of those radicals produced in different cellular compartments (del Rio et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Induction of Oxidative Stress by Sunflower Phytotoxins in Germinating Mustard Seeds

et al. 2007

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“…Patterson [43] revealed a considerable reduction of photosynthetic products and chlorophyll content of soybean (Glycine max) when 10 -30 µM caffeic, coumaric, ferulic, cinnamic, and vanillic acids were used. The leaf transpiration, stomatal conductance, and the intercellular CO 2 concentrations of cucumber were also declined by incubating with benzoic and cinnamic acid derivatives [24]. In contrast, most of the phenolic treatments showed high stimulatory effects on root growth of rice.…”

Section: Effects Of Selected Phenolics On Germination and Seedling Grmentioning

confidence: 96%

“…Phenolics, one of the most abundant compounds of active phytochemicals in dehulled rice, are empirically examined to increase during germination [23]. In addition, in many previous studies, the crucial role of phenolics in allelopathy was demonstrated [10,20,[24][25][26]. It is supposed that rice hulls play an important role in dormancy of rice or inhibition of rice germination because some inhibitory substances were found in rice hulls [27].…”

Section: Introductionmentioning

confidence: 99%

Allelopathic Activity of Dehulled Rice and its Allelochemicals on Weed Germination

Khang

Anh

et al. 2016

ILNS

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In this study, the allelopathic potential of dehulled rice, rice, and hulls of rice on germination of weeds was evaluated in laboratory. Phenolic acids in growth media of these plants were also identified and quantified using HPLC. Identified allelochemicals were reversely tested for phytotoxic effects on germination and seedling growth of barnyardgrass, lettuce, radish and rice. The results showed that the inhibitory effects of dehulled rice were stronger than those of hulls and rice. Dehulled rice caused 66.7% and 50.6% reduction in radish root length and lettuce shoot height, respectively. Dehulled rice showed strong inhibitory effects on root length of lettuce and shoot height of radish while hulls and rice exhibited stimulation. Regarding phenolic identification, vanillin and vanillic acid were detected as allelochemicals in root exudates of rice and tested plants. The results revealed that most of the vanillin and vanillic acid treatments showed high inhibitory effects on germination rates and seedling growth of lettuce and radish, high stimulatory activity on root elongation of rice. Vanillic acid (100 ppm and 200 ppm), vanillin (100 ppm) and their mixture (200 ppm) completely inhibited survival of lettuce. The findings indicate the allelopathic potential of dehulled rice which can be used for identification of more phytotoxins to produce bioherbicides in agricultural practices.

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“…Previous studies have demonstrated that in Cucumis sativus some phenolic compounds cause growth inhibition and decrease crop yield , Gerig & Blum 1991, Shafer & Blum 1991, Yu & Matsui 1997, Politycka 2002, Yu et al 2003, Politycka & Bednarski 2004. Among these, benzoic acid (BA) -OH ring substituents have been demonstrated to cause an increase in germination percentage, whereas ÁOCH 3 ring substituents decreased the percentage of germination.…”

Section: Introductionmentioning

confidence: 99%

Effect of benzoic acid hydroxyl- and methoxy-ring substituents on cucumber (Cucumis sativusL.) root membrane potential

Camusso

Sacco

Maffei

et al. 2007

Journal of Plant Interactions

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The allelopathic effect of some benzoic acid (BA) OH-and OCH 3 -ring substituents was studied on cucumber root transmembrane potential difference (Vm). Most of the methoxy-BAs induced a rapid Vm depolarization, followed by a Vm hyperpolarization, with the only exception for p -anisic acid (pA). On the other hand, salicylic acid (SA) and 3,4-dimethoxybenzoic acid (DHB) strongly depolarized Vm. A positive correlation was found between Vm hyperpolarization and lipophilicity of methoxylated BAs, whereas a positive correlation was found between lipophilicity and Vm depolarization of hydroxylated BAs. The influence of BAs on K ' was studied by means of specific blocking with Cs ' indicating a possible direct interaction of SA, gallic acid (GA), vanillic acid (VA) and 3,4-dimethoxybenzoic acid (DMB). Interference of BAs with the Vm hyperpolarizing effect of root perfusion with the fungal toxin fusicoccin were also observed.

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Effects of root exudates and aqueous root extracts of cucumber (Cucumis sativus) and allelochemicals, on photosynthesis and antioxidant enzymes in cucumber

Cited by 265 publications

References 33 publications

Induction of Oxidative Stress by Sunflower Phytotoxins in Germinating Mustard Seeds

Induction of Oxidative Stress by Sunflower Phytotoxins in Germinating Mustard Seeds

Allelopathic Activity of Dehulled Rice and its Allelochemicals on Weed Germination

Effect of benzoic acid hydroxyl- and methoxy-ring substituents on cucumber (Cucumis sativusL.) root membrane potential

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