ROS generation in plants: Boon or bane?

Garg, Neera; Manchanda, Geetanjali

doi:10.1080/11263500802633626

Cited by 380 publications

(184 citation statements)

References 163 publications

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“…H 2 O 2 is a significant secondary signal messenger, which plays an important role in many plant activities, including plant growth and secondary metabolite production. 21,22 In the present experiment in Greek oregano, COS induced H 2 O 2 production in leaves shortly after application. This result is consistent with previous findings, where H 2 O 2 production (generated in tobacco and oilseed rape epidermis) was rapidly upregulated following COS treatment.…”

Section: Journal Of Agricultural and Food Chemistrymentioning

confidence: 99%

“…20 Hydrogen peroxide (H 2 O 2 ) is known to be a significant secondary signal messenger, which plays an important role in many plant activities, including plant growth and secondary metabolite production. 21,22 The hypothesis of this study is that COS may be used as an additional method to the purely agronomic approaches to enhance the content of bioactive secondary metabolites in Greek oregano. In this study, we used COS in water in different concentrations to treat Greek oregano plants and to study the effect of COS on plant growth, yield, secondary metabolite concentration, and composition in aerial parts.…”

Section: ■ Introductionmentioning

confidence: 99%

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Chitosan Oligosaccharides Promote the Content of Polyphenols in Greek Oregano (Origanum vulgare ssp. hirtum)

Yin

Fretté

Christensen

et al. 2011

J. Agric. Food Chem.

123

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Greek oregano is commonly used as a spice and in traditional medicine in Eurasia. The plant is rich in secondary metabolites, such as volatile organic compounds (VOC) and polyphenols. Chitosan oligosaccharides (COS) are used as a plant elicitor. The objectives of this study were to determine the effects of COS on the growth and content of secondary metabolites in Greek oregano. Four COS treatments (50, 200, 500, and 1000 ppm) were used in a field experiment. The 200 and 500 ppm COS treatments promoted plant height growth, whereas 50 and 200 ppm COS upregulated the content of polyphenols significantly (38 and 29%, respectively). The COS treatments induced H 2 O 2 generation in Greek oregano leaves; thus, the effect of H 2 O 2 treatment was studied to investigate the possible role of H 2 O 2 in growth and polyphenol production. A low concentration of H 2 O 2 also promoted plant height growth, but only tendencies to higher polyphenol content were seen.

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Section: Journal Of Agricultural and Food Chemistrymentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Chitosan Oligosaccharides Promote the Content of Polyphenols in Greek Oregano (Origanum vulgare ssp. hirtum)

Yin

Fretté

Christensen

et al. 2011

J. Agric. Food Chem.

123

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show abstract

“…The CAT is the enzyme that has a high potential in the H 2 O 2 dismutation process into H 2 O and O 2 , being essential for the ROS detoxification during the toxic radicals production conditions (Garg & Manchanda, 2009). According to Figure 3, the catalase activity was similar in all the extract proportions in the germination first two hours.…”

Section: Resultsmentioning

confidence: 99%

Antioxidative enzymes of Cucumis sativus seeds are modulated by Leucaena leucocephala extracts

Ribeiro

Spiassi

Marcon

et al. 2017

Acta Sci. Biol. Sci.

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ABSTRACT.This study aimed to analyze oxidative stress produced in cucumber seeds and seedlings when exposed to aqueous extract from dried leaves of leucaena, as well as its effect on the germination behavior, early growth and the antioxidant enzymes activity. It was evaluated the percentage, the speed index, the average time, the frequency and germination synchronization, the root length and shoot, as well as the catalase and peroxidase enzymes activity. There was no significant inhibitory effect of the leaf extracts on the germination percentage. However, there was delay in the seeds germination, as the extract proportion increased. A stimulatory effect of the extract compared to the shoot length was observed, however the root growth was significantly reduced. The catalase activities had a peak at 24 hours after soaking the seeds, however, the activities were reduced in seedlings. The peroxidase activity was low in the seeds and increased in the seedlings at 168 hours after immersion. The results suggest that there was oxidative stress due to allelochemicals present in the leaves extracts from leucaena, verified by germination and initial growth changes, causing alterations in the plants rootlets.Keywords: allelopathy, reactive oxygen species, antioxidant enzymes.Enzimas antioxidativas de sementes de Cucumis sativus são moduladas por extratos de Leucaena leucocephala RESUMO. Este trabalho objetivou analisar o estresse oxidativo produzido em sementes e plântulas de pepino quando submetidas a extrato aquoso de folhas secas de leucena bem como, seu efeito sobre o comportamento germinativo, crescimento inicial e atividade de enzimas antioxidantes. Foram avaliadas a porcentagem, índice de velocidade, tempo médio, frequência e sincronização da germinação, comprimento de raiz e parte aérea e atividade das enzimas catalase e peroxidase. Não houve efeito inibitório significativo dos extratos sobre a porcentagem de germinação. No entanto, houve atraso na germinação das sementes, à medida que se aumentou a proporção do extrato. Foi observado efeito estimulatório do extrato em relação ao comprimento da parte aérea, porém o crescimento da raiz foi reduzido significativamente. As atividades da catalase tiveram pico às 24 horas de embebição das sementes, tendo sido reduzido nas plântulas. No entanto, a atividade da peroxidase foi baixa nas sementes e teve aumento nas plântulas, às 168 horas após a embebição. Os resultados sugerem que houve estresse oxidativo devido aos aleloquímicos presentes nos extratos foliares de leucena, verificado pelas alterações na germinação e de crescimento inicial, o que causou alterações nas radículas das plântulas.Palavras-chave: alelopatia, espécies reativas de oxigênio, enzimas antioxidantes.

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“…6f). CAT is a heme-containing enzyme; hence, increased Fe content after JA application (Table 2) can cause the increased CAT activity (Garg and Manchanda, 2009).…”

Section: Discussionmentioning

confidence: 99%

Role of jasmonic acid in improving tolerance of rapeseed (Brassica napus L.) to Cd toxicity

Ali

Hussain

Shamsi

et al. 2018

J. Zhejiang Univ. Sci. B

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Abstract:The well-known detrimental effects of cadmium (Cd) on plants are chloroplast destruction, photosynthetic pigment inhibition, imbalance of essential plant nutrients, and membrane damage. Jasmonic acid (JA) is an alleviator against different stresses such as salinity and drought. However, the functional attributes of JA in plants such as the interactive effects of JA application and Cd on rapeseed in response to heavy metal stress remain unclear. JA at 50 µmol/L was observed in literature to have senescence effects in plants. In the present study, 25 µmol/L JA is observed to be a "stress ameliorating molecule" by improving the tolerance of rapeseed plants to Cd toxicity. JA reduces the Cd uptake in the leaves, thereby reducing membrane damage and malondialdehyde content and increasing the essential nutrient uptake. Furthermore, JA shields the chloroplast against the damaging effects of Cd, thereby increasing gas exchange and photosynthetic pigments. Moreover, JA modulates the antioxidant enzyme activity to strengthen the internal defense system. Our results demonstrate the function of JA in alleviating Cd toxicity and its underlying mechanism. Moreover, JA attenuates the damage of Cd to plants. This study enriches our knowledge regarding the use of and protection provided by JA in Cd stress.

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ROS generation in plants: Boon or bane?

Cited by 380 publications

References 163 publications

Chitosan Oligosaccharides Promote the Content of Polyphenols in Greek Oregano (Origanum vulgare ssp. hirtum)

Chitosan Oligosaccharides Promote the Content of Polyphenols in Greek Oregano (Origanum vulgare ssp. hirtum)

<b>Antioxidative enzymes of <i>Cucumis sativus</i> seeds are modulated by <i>Leucaena leucocephala</i> extracts

Role of jasmonic acid in improving tolerance of rapeseed (Brassica napus L.) to Cd toxicity

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