Alleviation of drought-induced oxidative stress in maize (Zea mays L.) plants by dual application of 24-epibrassinolide and spermine

Talaat, Neveen B.; Shawky, Bahaa T.; Ibrahim, Ahmed S.

doi:10.1016/j.envexpbot.2015.01.006

Cited by 110 publications

(67 citation statements)

References 53 publications

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“…Several groups of quantitative or qualitative parameters exist which have been applied to characterize plant development and growth, physiological status, symbiotic interactions, stress symptoms, photosysnthesis, etc. during or at the end of an experimental growth period (Berger and Ludwig 2014;Grümberg et al 2015;He and Dijkstra 2014;Kalaji et al 2016;Latef and Chaoxing 2014;Munns 2002;Roger 2001;Salvatori et al 2014;Talaat et al 2015;Wehner et al 2015;Zhang et al 2015): (1) the simplest and most obvious parameters are: fresh and dry weight, root and shoot biomass production, root to shoot ratio, leaf area, grain yield, reproductive index. Most of them can be measured in a non-destructive manner, such as using optical imaging techniques, e.g., plant height, shoot diameter, leaf number, number of nodes, colour of leaves, the state of flowering, podding or grain filling, as well as observations of growth morphological dynamics, visible impacts of stress-based wilting symptoms, senescence, leaf necrosis, and phenotypical variations (Berger et al 2010;Li et al 2014;Vollenweider and Günthardt-Georg 2005).…”

Section: Introductionmentioning

confidence: 99%

Selection of plant physiological parameters to detect stress effects in pot experiments using principal component analysis

et al. 2019

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Appropriate selection and well-timed measurement of plant developmental, morphological and physiological parameters are essential to maximize efficacy and minimize time consumption of experiments. To select for the most sensitive indicators of drought or salt stress, three independent pot experiments with diverse setups were analysed with 20-20 measured parameters. Parameters of plant growth, phenology and symbiotic interactions, visual stress symptoms, photosynthetic activity, nutrient composition and vitality were studied and the result matrices were evaluated with principal component analysis (PCA). Stress effects manifested in PC1 of two experiments and in PC2 of the third one. Traits assumed to be adequate for stress indication were characterized by high PC1 or PC2 loading values. Beside parameters of biomass production, growth and visible stress symptoms, less evident traits e.g. root electrical capacitance, membrane stability index in roots and leaves, relative water content of leaves and SPAD units were identified.

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Section: Introductionmentioning

confidence: 99%

Selection of plant physiological parameters to detect stress effects in pot experiments using principal component analysis

et al. 2019

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“…Observations that POD and SOD activities increased or were maintained under water stress have been reported by many studies [34,37,38]. Under the same irrigation conditions, different thicknesses of soil spread over sediment had different water storage capacities, leading to varying degrees of water stress that affected maize growth, which would have resulted in differences in maize growth and oxidative stress [34]. With the antioxidant defense system [35,39], maize could protect itself from oxidative stress [36].…”

Section: Discussionmentioning

confidence: 90%

“…The different thicknesses of soil covering the sediment layer had different water holding capacities under the same irrigation conditions, leading to differences in water stress that affected crop growth, which would result in differences in crop production and oxidative stress [34]. With the antioxidant defense system [35], the crop plants could protect themselves from oxidative stress [36].…”

Section: Discussionmentioning

confidence: 99%

Optimal Thickness of Soil Cover for Reclaiming Subsided Land with Yellow River Sediments

Duo

Shao

2018

Sustainability

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The cultivated land area per capita in China is relatively small compared to the world average. However, most of the coal output is coming from underground mining, resulting in land subsidence and the destruction of existing cultivated land. The Yellow River is known as a ground-suspended river due to its large sediment concentration. Using unpolluted Yellow River sediment to reclaim the coal mine subsidence not only solves the problem of sediment deposition, but also solves the problem of shortage of filling material. Some experimental studies revealed low soil productivity as a result of thin soil cover. To ensure crop growth and production in land reconstructed with Yellow River sediments, determining the optimal thickness of soil cover over the sediment is extremely important. There were four experimental treatments and one control treatment. Each treatment was repeated three times. The control treatment was an original soil profile with 30 cm topsoil plus 110 cm subsoil. The four experimental treatments with different thickness of soil covers had the same thickness of topsoil (30 cm) and Yellow River sediments (60 cm), and different thickness of subsoil, which were 10, 30, 40, and 50 cm, respectively. Thus, the total thicknesses of soil cover (topsoil plus subsoil) were 40 cm, 60 cm, 70 cm, and 80 cm, respectively. The topsoil, subsoil, and Yellow River sediments were collected from Liangshan County. The soil type is fluvo-aquic. Maize (Zea mays L.) is the main crop in Liangshan County. A greenhouse experiment was conducted to investigate the growth of maize. The results showed that (1) the peroxidase (POD) activity, superoxide dismutase (SOD) activity, and malondialdehyde (MDA) content of maize leaf decreased with an increasing thickness of soil, while soluble protein (SP) and leaf relative water content (RWC) increased. (2) The dry biomasses of the shoot and root system in T70 and T80 were not significantly different from those in the control (3) Increased soil thickness is conducive to the storage of more water and available nutrients. Considering the time and cost of reconstruction, 70 cm is the optimal thickness of soil cover on Yellow River sediment to ensure maize growth.

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“…Chlorophyll molecules are predisposed to the action of free radicals formed within chloroplasts (Uzilday et al 2012).…”

Section: Resultsmentioning

confidence: 99%

“…Increased enzyme activity linked to oxidative stress under drought is reported in a wide range of crops, including corn (Talaat et al 2015), rice (Kumar et al 2015), wheat (Huseynova 2012), grass of the Cynodon genus (Liu & Chan 2015) and other C 4 plants (Aimar et al 2014). However, when water stress is severe, the enzyme activity is limited.…”

Section: Key-wordsmentioning

confidence: 99%

Azospirillum brasilense affects the antioxidant activity and leaf pigment content of Urochloa ruziziensis under water stress

Bulegon

Guimarães

Laureth

2016

Pesqui. Agropecu. Trop.

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Water stress leads to the formation of reactive oxygen species, resulting in degradation of leaf pigments and cell death. This study aimed at assessing the oxidative enzyme activity and photosynthetic pigment content in seeds and/or leaves of Urochloa ruziziensis (syn. Brachiaria) inoculated with Azospirillum brasilense under water stress. Assessments of soluble proteins, chlorophylls a and b and carotenoid contents, as well as the activity of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) enzymes, were conducted at the beginning of the water stress process and also under severe water stress and during plant rehydration. Seed inoculation showed a reduction in the action of SOD, under water stress, with an increase after rehydration. POD exhibited an activity greater than CAT in all the assessments, but it did not differ statistically under severe water stress. CAT activity increased under severe stress in all treatments, particularly for leaf inoculation. Chlorophyll a was slightly degraded, maintaining the levels of the irrigated control, while the chlorophyll b and carotenoid contents, in plants subjected to leaf inoculation with A. brasilense, were higher under water stress. It was concluded that the leaf inoculation of U. ruziziensis with A. brasilense makes the plant more efficient at removing reactive oxygen species and protecting chlorophyll a.

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Alleviation of drought-induced oxidative stress in maize (Zea mays L.) plants by dual application of 24-epibrassinolide and spermine

Cited by 110 publications

References 53 publications

Selection of plant physiological parameters to detect stress effects in pot experiments using principal component analysis

Selection of plant physiological parameters to detect stress effects in pot experiments using principal component analysis

Optimal Thickness of Soil Cover for Reclaiming Subsided Land with Yellow River Sediments

Azospirillum brasilense affects the antioxidant activity and leaf pigment content of Urochloa ruziziensis under water stress

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