The effect of magnesium nutrition on the antioxidant response of coffee seedlings under heat stress

Silva, Dayane Meireles da; Souza, Kamila Rezende Dázio de; Bôas, Lissa Vasconcellos Vilas; Alves, Y. S.; Alves, José Donizeti

doi:10.1016/j.scienta.2017.04.029

Cited by 22 publications

(9 citation statements)

References 38 publications

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“…Nonetheless, the ROS–antioxidant balance within different compartments of photosynthetically active cells is a highly dynamic system (temporal as well as spatial) and might therefore not be adequately reflected by static measurements. For instance, studies that investigated time courses of ROS accumulation and enzyme activities during the onset of Mg deficiency found different antioxidant enzyme activities as well as ascorbate, glutathione or ROS concentrations depending on the time after the onset of Mg deficiency (Anza et al, 2005; Alsharafa, 2017; da Silva et al, 2017). Hence, contradictory results might also be explained by different experimental setups and further dependencies e.g., on the sampling date or day time of sampling or interrelations to other metabolic cycles such as nitrogen assimilation and photorespiration are likely.…”

Section: Discussionmentioning

confidence: 99%

“…In recent years, the effect of Mg on plant shoot and root formation, photosynthetic performance, and cellular stress defense mechanisms was targeted in a growing number of scientific studies on various crops and plant species (e.g., Tang et al, 2012; Blasco et al, 2015; Huang et al, 2016; Tränkner et al, 2016; da Silva et al, 2017; Yang et al, 2017; Rehman et al, 2018). Comprehensive reviews on the role of Mg in plant physiology (Guo et al, 2016; Chen Z. C. et al, 2018) and specifically in photosynthetic processes (Tränkner et al, 2018) were published.…”

Section: Introductionmentioning

confidence: 99%

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Critical Leaf Magnesium Thresholds and the Impact of Magnesium on Plant Growth and Photo-Oxidative Defense: A Systematic Review and Meta-Analysis From 70 Years of Research

2019

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Magnesium (Mg) deficiency in plants is a widespread problem affecting productivity and quality in agricultural systems and forestry. Although numerous studies addressed the effect of Mg deficiency on biomass and photosynthetic CO 2 assimilation, a summary evaluation of the effect of Mg supply on plant growth and photosynthesis is so far missing. We performed a systematic review and meta-analysis to collect and combine all relevant scientifically published data on the relationship between Mg nutrition and parameters that can be related to plant growth such as root and shoot biomass, harvestable yield, net CO 2 assimilation and antioxidant enzyme activities. Moreover, this data pool was used to calculate critical Mg leaf concentrations for biomass and net CO 2 assimilation for various plant species. Summarizing all studies included in our analysis, adequate Mg supply enhances net CO 2 assimilation by 140%, leading to a biomass increase of 61% compared to Mg deficient control plants. Biomass partitioning between shoot and root is not only sensitive to Mg nutrition, but highly affected by the experimental cultivation technique. If plants are grown under adequate Mg supply during initial growth stages before exposing them to Mg deficiency, the shoot-root ratio was not affected. Otherwise, the shoot-root ratio significantly decreased in contrast to Mg deficient control plants. Concentration of reactive oxygen species decreased under adequate Mg supply by 31% compared to Mg deficient plants, resulting in decreased activities of most antioxidant enzymes and metabolites under adequate Mg supply. We combined all published data relating leaf Mg concentrations to growth and found a critical leaf Mg range for dry weight between 0.1 and 0.2% which was valid for numerous crop species such as wheat, potato, rice, maize, sorghum and barley. Critical leaf Mg concentrations for net CO 2 assimilation were higher than for biomass for most species, e.g., potato, rice, citrus, and cotton. In conclusion, our evaluation can be used to identify Mg nutritional status in plants and may help to optimize fertilization strategies. It quantifies the demand of Mg for various crop and tree species for maintaining important physiological processes such as net CO 2 assimilation that is required for optimal plant growth and yield.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Critical Leaf Magnesium Thresholds and the Impact of Magnesium on Plant Growth and Photo-Oxidative Defense: A Systematic Review and Meta-Analysis From 70 Years of Research

2019

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“…Mg‐ and K‐deficiency induce commonly elevated ROS levels and enhanced ROS‐detoxifying enzyme activity. Under low K and Mg supply, increased H 2 O 2 or O 2 − concentrations have been reported on numerous plants species such as Arabidopsis, maize, rice, cotton and coffee (Shin and Schachtman , Weng et al , Hu et al , Da Silva et al ). A K‐inefficient cotton cultivar increased O 2 − and H 2 O 2 leaf concentrations, and increased activities of SOD and APX, whereas a K‐efficient cotton cultivar only increased APX, but not SOD activity, and neither H 2 O 2 nor O 2 − concentrations were affected (Wang et al ).…”

Section: K and Mg Involvement In Photoprotectionmentioning

confidence: 99%

Functioning of potassium and magnesium in photosynthesis, photosynthate translocation and photoprotection

Tränkner

Tavakol

Jákli

2018

Physiologia Plantarum

361

169

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Potassium (K) and magnesium (Mg) are mineral nutrients that are required in large quantities by plants. Both elements critically contribute to the process of photosynthesis and the subsequent long-distance transport of photoassimilates. If K or Mg is not present in sufficient quantities in photosynthetic tissues, complex interactions of anatomical, physiological and biochemical responses result in a reduction of photosynthetic carbon assimilation. As a consequence, excessive production of reactive oxygen species causes photo-oxidation of the photosynthetic apparatus and causes an up-regulation of photoprotective mechanisms. In this article, we review the functioning of K and Mg in processes directly or indirectly associated with photosynthesis. Focus is given to chloroplast ultrastructure, light-dependent and -independent reactions of photosynthesis and the diffusion of CO - a major substrate for photosynthesis - into chloroplasts. We further emphasize their contribution to phloem-loading and long-distance transport of photoassimilates and to the photoprotection of the photosynthetic apparatus.

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“…Ca is strongly related to the integrity of the membranes and cell walls, and to root growth (Vliet & Giller, 2017). It also acts as a secondary messenger, integrating the complex system for transducing the signals initiated by the binding of plant hormones to their receptors (Silva et al, 2017). Among the most common calcium-binding proteins are calmodulin and the calcium-dependent protein kinases (Vliet & Giller, 2017).…”

Section: Resultsmentioning

confidence: 99%

Nutritional Efficiency and Morphophysiological Aspects With Growth in the ‘Okinawa Roxo’ Peach Rootstock

Souza¹,

Ritterbusch²,

Menegatti³

et al. 2019

JAS

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The aim of this study was to evaluate the efficiency of nutrient uptake, accumulation, distribution and use, and its relationship with growth variables, chlorophyll content, and root and shoot dry-weight partitioning in the ‘Okinawa Roxo’ peach rootstock, submitted to different nutrient solutions and substrates. The experimental design was completely randomised, with four treatments and five replications. The treatments were T1: Ns1 = Souza et al. nutrient solution (2011), applied to a sand substrate; T2: Ns2 = Hoagland and Arnon (1950), applied to a sand substrate; T3: Commercial Substrate + H2O; and T4: Control, Sand + H2O. Ninety days after transplanting (DAT), morphological, physiological and nutritional parameters were determined in the ‘Okinawa Roxo’ rootstock, together with the correlation between nitrogen concentration and nitrogen balance index, and the chlorophyll content and index. The greatest zinc content was detected in the shoots of the ‘Okinawa Roxo’ plants, at more than 80% of the accumulated total. Treatments T1 and T2 (nutrient solutions Ns1 and Ns2 respectively) made it possible to obtain ‘Okinawa Roxo’ plants with the best morphophysiological characteristics, being ready for grafting three months after transplanting in a greenhouse. The use of the Ns1 nutrient solution resulted in greater efficiency in the uptake and use of the nutrients nitrogen (N), potassium (K) and iron (Fe). The N and Total Chlorophyll concentrations in the leaves of the red-leaved peach tree can be estimated indirectly with a chlorophyll meter, and are an accurate indication of the nutritional status of the plant in relation to nitrogen content.

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The effect of magnesium nutrition on the antioxidant response of coffee seedlings under heat stress

Cited by 22 publications

References 38 publications

Critical Leaf Magnesium Thresholds and the Impact of Magnesium on Plant Growth and Photo-Oxidative Defense: A Systematic Review and Meta-Analysis From 70 Years of Research

Critical Leaf Magnesium Thresholds and the Impact of Magnesium on Plant Growth and Photo-Oxidative Defense: A Systematic Review and Meta-Analysis From 70 Years of Research

Functioning of potassium and magnesium in photosynthesis, photosynthate translocation and photoprotection

Nutritional Efficiency and Morphophysiological Aspects With Growth in the ‘Okinawa Roxo’ Peach Rootstock

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