Reactive oxygen species, antioxidants and signaling in plants

Ahmad, Parvaiz; Sarwat, Maryam; Sharma, Satyawati

doi:10.1007/bf03030694

Cited by 425 publications

(231 citation statements)

References 59 publications

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“…A strong inhibitory effect of A. philoxeroides extracts on the germination and seedling growth of Parthenium was found in another reported study [27].…”

Section: Discussionmentioning

confidence: 56%

Allelopathic Effects of Aqueous Extracts of Alternanthera philoxeroides on the Growth of Zoysia matrella

Huang¹,

YanYan²,

Wang³

et al. 2017

Pol. J. Environ. Stud.

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Alternanthera philoxeroides is a perennial invasive species worldwide which can greatly affect native ecosystems and agricultural production. Our research studied the allelopathic effects of aqueous extracts of A. philoxeroides on the growth and antioxidant enzyme activities of Zoysia matrella, and isolated and analyzed the dominant allelochemicals in root extracts of A. philoxeroides. The overall allelopathic effects of A. philoxeroides extracts on the growth and antioxidant enzyme activities of Z. matrella were found to be slightly stimulatory (concentrations ≤10 g L -1) and highly inhibitory (≥40 g L -1). Malondialdehyde contents were significantly enhanced with increasing concentrations of A. philoxeroides extracts. The strength of the allelopathic effects of three extracts of A. philoxeroides on Z. matrella followed the order: roots > leaves > stems. The dominant substance was extracted and identified to be ethyl propionate by gas chromatographymass spectrometry (GC-MS). Pot experiment results show that the effects of ethyl propionate on growth and enzyme activities of Z. matrella also ranged from slightly stimulating to highly inhibiting in a similar fashion to the effects of A. philoxeroide extracts on Z. matrella. The overall allelopathic effects of A. philoxeroides on Z. matrella ranged from slightly stimulating to highly inhibiting. The most abundant allelochemical component of root extracts was identified as ethyl propionate, which also exhibited inhibitory effects similar to A. philoxeroides extracts on Z. matrella.

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“…A strong inhibitory effect of A. philoxeroides extracts on the germination and seedling growth of Parthenium was found in another reported study [27].…”

Section: Discussionmentioning

confidence: 56%

Allelopathic Effects of Aqueous Extracts of Alternanthera philoxeroides on the Growth of Zoysia matrella

Huang¹,

YanYan²,

Wang³

et al. 2017

Pol. J. Environ. Stud.

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“…This suggestion was confirmed by the low amount of O 2 -in the different part of this cultivar. APX utilizes AsA as its specific electron donor to reduce H 2 O 2 to water with the generation of monodehydroascorbate (Shigeoka et al, 2002), and plays a crucial role in the management of ROS during stress (Ahmad et al, 2008). It has been reported previously that salinity increases APX activity in many salt tolerant cultivars (Hernández et al, 2001;Sairam et al, 2005;Koca et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Comparison of an antioxidant system in tolerant and susceptible wheat seedlings in response to salt stress

Feki

Tounsi

Brini

2018

Span. j. agric. res.

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It has been demonstrated previously that the physiological and molecular analysis of seedlings of the tolerant (Om Rabia3) and susceptible (Mahmoudi) Tunisian wheat genotypes were different at short and long-term response to salinity. In this study, we examined the antioxidant defence system in seedlings of these two cultivars at short-term response to different NaCl concentrations. The findings showed that high salinity tolerance of cv. Om Rabia3, as manifested by lower decrease in its dry biomass, was associated with lower malondialdehyde and hydrogen peroxide contents, lower accumulation of the superoxide (O 2 -) in the roots and the shoots, and also lower decrease in ascorbate content than those in cv. Mahmoudi. Moreover, the expression of some genes coding for antioxidant enzymes such as the catalase, the superoxide dismutase and the peroxidase were enhanced by NaCl stress especially in the salt-tolerant cultivar. In parallel, their activities were increased in response to the same condition of stress and especially in the cv. Om Rabia3. Taken together, these data suggested that the capacity to limit oxidative damage is important for NaCl tolerance of durum wheat.

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“…Redox signal transduction pathways are common in both plant and animal systems (Ahmad et al, 2008;Jones, 2008). The generation of ROS may also be directly involved in morphological changes associated with development of the parasitic organ.…”

Section: Discussionmentioning

confidence: 99%

A Single-Electron Reducing Quinone Oxidoreductase Is Necessary to Induce Haustorium Development in the Root Parasitic Plant Triphysaria

et al. 2010

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Parasitic plants in the Orobanchaceae develop haustoria in response to contact with host roots or chemical haustoriainducing factors. Experiments in this manuscript test the hypothesis that quinolic-inducing factors activate haustorium development via a signal mechanism initiated by redox cycling between quinone and hydroquinone states. Two cDNAs were previously isolated from roots of the parasitic plant Triphysaria versicolor that encode distinct quinone oxidoreductases. QR1 encodes a single-electron reducing NADPH quinone oxidoreductase similar to z-crystallin. The QR2 enzyme catalyzes two electron reductions typical of xenobiotic detoxification. QR1 and QR2 transcripts are upregulated in a primary response to chemical-inducing factors, but only QR1 was upregulated in response to host roots. RNA interference technology was used to reduce QR1 and QR2 transcripts in Triphysaria roots that were evaluated for their ability to form haustoria. There was a significant decrease in haustorium development in roots silenced for QR1 but not in roots silenced for QR2. The infrequent QR1 transgenic roots that did develop haustoria had levels of QR1 similar to those of nontransgenic roots. These experiments implicate QR1 as one of the earliest genes on the haustorium signal transduction pathway, encoding a quinone oxidoreductase necessary for the redox bioactivation of haustorial inducing factors.

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Reactive oxygen species, antioxidants and signaling in plants

Cited by 425 publications

References 59 publications

Allelopathic Effects of Aqueous Extracts of Alternanthera philoxeroides on the Growth of Zoysia matrella

Allelopathic Effects of Aqueous Extracts of Alternanthera philoxeroides on the Growth of Zoysia matrella

Comparison of an antioxidant system in tolerant and susceptible wheat seedlings in response to salt stress

A Single-Electron Reducing Quinone Oxidoreductase Is Necessary to Induce Haustorium Development in the Root Parasitic Plant Triphysaria

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