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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Alleviation of adverse effects of salt stress on lettuce (Lactuca sativa var. crispa) by application of vermicompost

100%
Kiran S.
Acta Scientiarum Polonorum. Hortorum Cultus
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2019
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tom 18
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nr 5
In arid and semiarid regions, soil salinity causes the salt stress in plants and negatively affects the crop production. In this respect, organic farming practices are becoming the foreground as applications that are sensitive to the environment and support sustainability in agriculture. This study aimed to explain the role of vermicompost (VC) for reducing the effect of salt stress on lettuce (Lactuca sativa var. crispa) plant. The experiments were performed with different concentrations of VC (0, 2.5 and 5% VC on a weight per weight basis of soil-w/w) and salt stress treatments (4 and 8 dS m–1 NaCl levels). Under salt stress, shoot height, relative water content (RWC), stomatal conductance (gs), chlorophyll a (Chla) content decreased, while electrolyte leakage (EL), malondialdehyde (MDA) contents and superoxide dismutase (SOD) and catalase (CAT) activities significantly increased in parallel with the severity of the stress. In this study, VC under the salinity stress significantly increased the RWC, gs and Chla, Chlt and carotenoid contents in the leaf tissues; however, MDA and EL contents decreased and SOD and CAT activities increased compared to the controls. In all levels of NaCl, the 5% ratio of VC significantly reduced the negative effects of salinity.
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Effects of salinity stress on growth and phenolics of rice (Oryza sativa L.)

100%
Minh L. T., Khang D. T., Ha P. T. T., Tuyen P. T., Minh T. N., Quan N. V., Xuan T. D.
International Letters of Natural Sciences
|
2016
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tom 57
This study was conducted to determine the correlation between of salinity stress on growth and phenolic compounds in rice. It was observed that salinity stress caused a significant decrease in shoot lengths, fresh and dry weights of all rice varieties. Under salinity stress, changes of chemical contents also differed among phenolic compounds and rice cultivars. Total phenolics and flavonoids, and contents of vanillin and protocatechuic acid in tolerant varieties were strongly increased, whereas in contrast, they were markedly reduced in the susceptible cultivar. Ferulic acid and p-coumaric acid were detected only in tolerance rice. Vanillin and protocatechuic acid may play a role, but ferulic acid and p-coumaric acid may be much involved in the tolerant mechanism against salinity stress. Ferulic acid and p-coumaric acid and their derivatives are potent to be exploited as promising agents to reduce detrimental effects of salinity stress on rice production.
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Alleviating the salt stress effects in Salvia splendens by humic acid application

80%
Karimian Z., Samiei L., Nabati J.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2019
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tom 18
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nr 5
Salinity stress is a serious problem in urban landscape of arid and semi arid regions. To overcome the adverse impact of salinity, the application of organic matter and plant nutrients in the growth media for improving the plant growth is essential. An experiment was conducted in order to determine the response of Salvia splendens to salinity levels and also the role of humic acid in the salt stress alleviation. In the current experiment, five salinity levels (0, 20, 40, 60, and 80 mM NaCl) and three humic acid (0, 100, 500 and 1000 mg/l) treatments were prepared. The effects of these treatments were investigated on some growth parameters, physiological characteristics and also biochemical compounds. The results indicated that the growth parameters decreased in saline-treated than control plants. Different salinity levels significantly affected relative water content, evaporation rate and also electrolyte leakage. Salinity caused the increase in proline, malondialdehyde, sugar content, DPPH, total phenol content and decrease in chlorophyll, compare to the control plants. Application of humic acid on Salvia splendens decreased the leaf area and plant height compared to the control plants. Thus, regarding the growth parameters, it is probable that the effect of humic acid on the biochemical compounds is similar to salinity effect. The findings suggest that sage is an ornamental plant sensitive to salinity and humic acid (in the studied levels) could not alleviate the negative effects of salt stress on this plant.
4

Dehorning of calves - methods of pain and stress alleviation - a review

80%
Kupczynski R., Budny A., Spitalniak K., Tracz E.
Annals of Animal Science
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2014
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tom 14
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nr 2
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Using of microbial fertilizer as biostimulant alleviates damage from drought stress in guar (Cyamopsis tetragonoloba (L.) Taub.) seedlings

80%
Kusvuran A., Kusvuran S.
International Letters of Natural Sciences
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2019
|
tom 76
Drought is a significant environmental stress that limits plant growth and yield. In this study, an investigation of guar, grown under different drought level conditions [(S0: 100% of field capacity), S1 (depletion of 75% the available water holding capacity), S2 (depletion of 50% the available water holding capacity), S3 (depletion of 25% the available water holding capacity), S4 (no applied irrigation water)] with regards to the impact of Chlorella vulgaris based microbial fertilizer on physiological, morphological, and enzymatic activity was performed. Microbial fertilizer applications significantly increased shoot length, fresh and dry weight of the shoot and root, and leaf number and area of guar plants compared to the only drought stress treatments. In addition, following the above-mentioned procedures, there were significant increases in the relative water content, total phenolic and flavonoid contents, superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and glutation reductase (GR) activity. However, the malondialdehyde (MDA) content were significantly decreased. Hence, the results support the administration of a foliar application to the microbial fertilizer containing microalgae in order to increase the guar plant’s defense system, enabling it to tolerate the negative effects resulting from drought stress.
6

Poziom kortykosteronu we krwi indykow miesnych po zastosowaniu przed obrotem przedubojowym witaminy E i selenu

61%
Sowinska J., Filus K., Gierczynski S., Wojcik A.
Acta Academiae Agriculturae ac Technicae Olstenensis. Zootechnica
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1995
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tom 44
55-60
Przeprowadzono badania nad zastosowaniem witaminy E i selenu do łagodzenia stresu przedubojowego u indyków mięsnych trzech typów użytkowych: ciężkiego, średniociężkie- lekkiego. Indyczki były odchowywane do 16., a indory do 23. tyg. życia. Na 7 dni przed odstawą do rzeźni wyodrębnionej grupie ptaków zadano jednorazowo z wodą do picia preparat Ursoselevit (0.2 mg selenianu sodu i 1.2 mg L-tokoferolu na 1 kg m.c.). Krew do oznaczania poziomu kortykosteronu (od 10 szt. indyczek i indorów z każdej grupy) pobierano na fermie od ptaków z grupy 1 (kontrolnej) oraz w rzeźni od grupy 2, która nie otrzymała Ursoselevitu i grupy 3, której podano ten preparat. Kortykosteron oznaczano metodą radiokompetycyjną. Otrzymane wyniki potwierdziły stresogenność obrotu przedubojowego, bowiem poziom kortykosteronu w grupach 2 i 3 był dla każdego typu użytkowego wyższy w grupie kontrolnej (P≤0.01). Niższy statystycznie poziom kortykosteronu w grupie 3, w porównaniu z grupą 2, uzyskano u samic typu ciężkiego (P≤0.01) i lekkiego (P≤0.05) oraz mców typu lekkiego (P≤0.01) i średniociężkiego (P≤0.05). U indyczek typu średniociężkiego i indorów typu ciężkiego występujące różnice między grupą 2 i 3 były niewielkie nieistotne statystycznie. Wobec niejednoznaczności otrzymanych wyników wskazane są dalsze badania nad przydatnością witaminy E i selenu do łagodzenia stresu przedubojowego indyków rzeźnych.
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Presoaking treatment of propolis aqueous extract alleviates salinity stress in spinach (Spinacia oleracea L.) plants grown under calcareous saline soil conditions

61%
El-Yazal M. A. S.
International Letters of Natural Sciences
|
2019
|
tom 76
Two pot experiments were conducted during the two successive seasons of 2014 and 2015 to study the effect of propolis extract at the rates 0, 6000, 7000, 8000 and 9000 mg/L solution used as seed soaking to spinach seedlings on growth, yield and some chemical constituents of spinach plants (Spinacia oleracea L.) grown under calcareous saline soil conditions. The obtained results indicated that increasing the rates of propolis extract as seed soaking application increased the growth parameters of the treated plants. The best result was obtained by the middle rate (7000 mg/L) as seed soaking in both seasons of the study. The same trend was also observed regarding all studied chemical constituents, i.e. chlorophyll a, b and total caroteniods concentration, anthocyanine, total carbohydrates, total and reducing sugars, total free amino acid, free proline, crude protein, total indoles, total phenols, N, P and K in leaves. Moreover, soaking seeds in propolis extract before planting improved the metabolic activity of seeds through the increase in seed values in total and reducing sugars, total free amino acid, total indoles and total phenols as well as the lowest values of total carbohydrate. Thus, the coincident application of propolis extract at (7000 mg/L) as a seed soaking ingredient is recommended for improving growth, yield and chemical composition of spinach plants and for overcoming the adverse effect of saline conditions.
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