Effect of hydrogen peroxide on growth and activity of some enzymes involved in proline metabolism of sweet corn seedlings under copper stress

Wen, Jinfen; Gong, Ming; Liu, Ying; Hu, Jia-Lin; Deng, Minghua

doi:10.1016/j.scienta.2013.09.031

Cited by 46 publications

(14 citation statements)

References 35 publications

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“…are activated. In supra-optimal copper concentration, coffee seedlings showed a significant increase in proline content (Fig 2C and 2D), which is in agreement with Silene vulgaris (Schat et al, 1997), Oriza sativa (Chen et al, 2001) and Zea mays (Wen et al, 2013). However, an interesting fact in the present study was the increase of proline levels in seedlings under copper deficiency in both leaf and root ( Fig.…”

Section: Discussionsupporting

confidence: 89%

Copper (Cu) stress affects carbon and antioxidant metabolism in Coffea arabica seedlings

Santos¹,

Fária²,

Silva³

et al. 2017

Aust J Crop Sci

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Although copper is a micronutrient essential for the normal development of plants, both insufficient and supra optimal doses can disrupt the functioning of metabolism and the production of biomass. To study the biochemical and physiological impacts of deficiency and excess of copper in coffee, we treated 6-month-old seedlings of Coffea arabica L. Catuaí cultivar to three copper treatments: control (0.03 ppm), excess (0.12 ppm) and deficiency (0 ppm) for 60 days. The changes in levels of photosynthetic pigments, biomass allocation, carbohydrate partitioning, antioxidant system and proline levels were evaluated. Under deficiency and excess of copper coffee seedlings showed lower levels of chlorophyll, reduction on dry weight of shoot, lower sugar levels and higher content of hydrogen peroxide. We also observed increased levels of proline and enzymatic activity of the antioxidant system, providing conditions for the reduction of oxidative stress triggered by nutritional imbalance. In general, the results showed that coffee plants invest in antioxidant defense system as an alternative to maintain redox balance when exposed to deficiency or excess copper. However, it is not effective to prevent an increase in lipid peroxidation. Authors may indicate an optimum range for application of copper in coffee.

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Section: Discussionsupporting

confidence: 89%

Copper (Cu) stress affects carbon and antioxidant metabolism in Coffea arabica seedlings

Santos¹,

Fária²,

Silva³

et al. 2017

Aust J Crop Sci

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show abstract

“…Recently, several researches have indicated that proline accumulation occurs in stressed plants and can be mediated by signaling molecules, including H 2 O 2 (e.g. Zhu, 2002;Zhang et al, 2008;Yang et al, 2009;Wen et al, 2013). In this context, it may be speculated that proline is the key metabolite by which A/A25 plants tolerated the salinity conditions imposed in the present experiments.…”

Section: Discussionmentioning

confidence: 67%

Salt-tolerant rootstock increases yield of pepper under salinity through maintenance of photosynthetic performance and sinks strength

Penella

Landi

Guidi

et al. 2016

Journal of Plant Physiology

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The performance of a salt-tolerant pepper (Capsicum annuum L.) accession (A25) utilized as a rootstock was assessed in two experiments. In a first field experiment under natural salinity conditions, we observed a larger amount of marketable fruit (+75%) and lower Blossom end Root incidence (-31%) plants, which had a constitutive enhanced root apparatus and 2.6-fold higher proline content under salinity, did not show alterations in photosynthesis and growth and MDA levels increased only slightly. Our results underline that salt tolerance in A/A25 grafted plants could be mediate by (I) the maintenance of root sink strength and (II) the markedly increased proline levels that could balance cell osmotic pressure thus protecting enzymatic stability from salttriggered damage.

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“…Hence, under the action of pyrroline-5-carboxylate reductase, pyrroline-5-carboxylate is recycled back to proline with concomitant oxidation of NADPH [ 317 ]. The enzyme proline dehydrogenase is mainly responsible for the degradation and accumulation of proline in plants [ 277 , 318 ].…”

Section: Detoxification Mechanisms Of Arsenic In Plantsmentioning

confidence: 99%

Arsenic Uptake, Toxicity, Detoxification, and Speciation in Plants: Physiological, Biochemical, and Molecular Aspects

Abbas

Murtaza

Bibi

et al. 2018

IJERPH

629

256

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Environmental contamination with arsenic (As) is a global environmental, agricultural and health issue due to the highly toxic and carcinogenic nature of As. Exposure of plants to As, even at very low concentration, can cause many morphological, physiological, and biochemical changes. The recent research on As in the soil-plant system indicates that As toxicity to plants varies with its speciation in plants (e.g., arsenite, As(III); arsenate, As(V)), with the type of plant species, and with other soil factors controlling As accumulation in plants. Various plant species have different mechanisms of As(III) or As(V) uptake, toxicity, and detoxification. This review briefly describes the sources and global extent of As contamination and As speciation in soil. We discuss different mechanisms responsible for As(III) and As(V) uptake, toxicity, and detoxification in plants, at physiological, biochemical, and molecular levels. This review highlights the importance of the As-induced generation of reactive oxygen species (ROS), as well as their damaging impacts on plants at biochemical, genetic, and molecular levels. The role of different enzymatic (superoxide dismutase, catalase, glutathione reductase, and ascorbate peroxidase) and non-enzymatic (salicylic acid, proline, phytochelatins, glutathione, nitric oxide, and phosphorous) substances under As(III/V) stress have been delineated via conceptual models showing As translocation and toxicity pathways in plant species. Significantly, this review addresses the current, albeit partially understood, emerging aspects on (i) As-induced physiological, biochemical, and genotoxic mechanisms and responses in plants and (ii) the roles of different molecules in modulation of As-induced toxicities in plants. We also provide insight on some important research gaps that need to be filled to advance our scientific understanding in this area of research on As in soil-plant systems.

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Effect of hydrogen peroxide on growth and activity of some enzymes involved in proline metabolism of sweet corn seedlings under copper stress

Cited by 46 publications

References 35 publications

Copper (Cu) stress affects carbon and antioxidant metabolism in Coffea arabica seedlings

Copper (Cu) stress affects carbon and antioxidant metabolism in Coffea arabica seedlings

Salt-tolerant rootstock increases yield of pepper under salinity through maintenance of photosynthetic performance and sinks strength

Arsenic Uptake, Toxicity, Detoxification, and Speciation in Plants: Physiological, Biochemical, and Molecular Aspects

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