Drought stress effect on polyphenolic content and antioxidant capacity of cowpea pods and seeds

2020 ◽  
Author(s):  
Márcia Carvalho ◽  
Irene Gouvinhas ◽  
Isaura Castro ◽  
Manuela Matos ◽  
Eduardo Rosa ◽  
...  
Keyword(s):  
Drought Stress ◽  
Antioxidant Capacity ◽  
Stress Effect ◽  
Polyphenolic Content

scholarly journals HEAT AND DROUGHT STRESS EFFECT IN WHEAT GENOTYPES: A REVIEW

2021 ◽  
Vol 1 (2) ◽  
pp. 77-79
Author(s):  
Sandesh Paudel ◽  
Netra Prasad Pokharel ◽  
Susmita Adhikari ◽  
Sarah Poudel
Keyword(s):  
Heat Stress ◽  
Drought Stress ◽  
Harmful Effect ◽  
Winter Season ◽  
Triticum Aestivum L ◽  
High Yield ◽  
Severe Drought ◽  
Stress Effect ◽  
Cereal Crop ◽  
Drought And Heat Stress

Bread wheat (Triticum aestivum L.) belonging to family Poaceae is the most important cereal crop as it contributes major portion to the world food for the world’s population. Similarly, it is the third most cultivated cereal crop in Nepal in terms of production and area. Wheat is a winter season crop which is usually grown within a temperature range of 15-250C in cold and dry weather. However frequent irrigations are crucial for proper growth of the plant, high yield and high quality of the grain. The annual productivity of wheat has been reported to be 2.49 tons per hectare. Water is found to be one of the most important factors in wheat production and by far not a single water stress tolerant variety has been introduced thus water management is necessary. In Nepal around 35% of the total wheat is cultivated under rainfed condition annually and in Terai this is around 19%. This cultivated area faces a severe drought stress during growing stage and heat stress during anthesis stage. Various studies have suggested that the combined impacts of drought and heat stress had a significant harmful effect on wheat than individual stresses (Stress and Review, 2017). Under drought stress days to anthesis and days to maturity were reduced by 10% and 14% while under heat stress these were reduced by 16% and 20% respectively. Combined effect of drought and heat stress caused reduction in DTA by 25% DTH by and 31%.

Antioxidant capacity and polyphenolic content of high-protein lupin products

2009 ◽  
Vol 112 (1) ◽  
pp. 84-88 ◽  
Author(s):  
Cristina Martínez-Villaluenga ◽  
Henryk Zieliński ◽  
Juana Frias ◽  
Mariusz K. Piskuła ◽  
Halina Kozłowska ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
High Protein ◽  
Polyphenolic Content

scholarly journals Polyphenolic Content and Antioxidant Capacity in Fruits of Plum (Prunus domestica  L.) Cultivars “Valjevka” and “Mildora” as Influenced by Air Drying

2013 ◽  
Vol 36 (4) ◽  
pp. 229-237 ◽  
Author(s):  
Nemanja Miletić ◽  
Olga Mitrović ◽  
Branko Popović ◽  
Viktor Nedović ◽  
Branislav Zlatković ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Prunus Domestica ◽  
Air Drying ◽  
Polyphenolic Content

scholarly journals Antioxidants from Tropical Herbs

2010 ◽  
Vol 5 (3) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Rasyidah Razab ◽  
Azlina Abdul Aziz
Keyword(s):  
Free Radicals ◽  
Antioxidant Capacity ◽  
Strong Correlation ◽  
Antioxidant Activities ◽  
Polyphenolic Compounds ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Antioxidant Power ◽  
Polyphenolic Content ◽  
Trolox Equivalent ◽  
Ferric Reducing Antioxidant Power

Plants that contain high amounts of polyphenolic compounds are potential candidates for natural antioxidant sources. Studies are on going in the search for new sources of antioxidants. Not much data are available on the antioxidant capacity of tropical herbs. With this in mind, 19 commonly consumed Malaysian herbs were analyzed for their polyphenolic content and antioxidant activities. A majority of these plants have never been studied before with regards to their polyphenolic content and antioxidant activities. The shoots of Anacardium occidentale, the shoots and fruits of Barringtonia racemosa, Pithecellobium jiringa and Parkia speciosa had high polyphenolic contents (> 150 μg gallic acid equivalents/mg dried plant) and antioxidant activities when measured using the ferric reducing antioxidant power (FRAP) (>1.2 mM) and Trolox equivalent antioxidant capacity (TEAC) assays (>2.4 mM). A strong correlation was observed between the two antioxidant assays (FRAP vs TEAC) implying that the plants could both scavenge free radicals and reduce oxidants. There was also a strong correlation between the antioxidant activities and polyphenolic content suggesting the observed antioxidant activities were contributed mainly by the polyphenolics in the plants.

scholarly journals Reduction of drought stress effect in spring barley (Hordeum vulgare L.) by nitrogen fertilization

2008 ◽  
Vol 54 (No. 1) ◽  
pp. 7-13 ◽  
Author(s):  
M. Krček ◽  
P. Slamka ◽  
K. Olšovská ◽  
M. Brestič ◽  
M. Benčíková
Keyword(s):  
Drought Stress ◽  
Nitrogen Fertilization ◽  
Water Regime ◽  
Reductase Activity ◽  
Spring Barley ◽  
Stress Conditions ◽  
Growth Stages ◽  
Moisture Regime ◽  
Stress Effect ◽  
Optimum Water

An effect of nitrogen rates (0.0 g, 1.0 g, 2.0 g N per pot) on NRA (nitrate reductase activity) in leaves of spring barley (cultivar Kompakt) was investigated in a pot experiment. Plants were grown under optimum moisture regime and drought stress was induced during the growth stages of tillering, shooting and earing. Before and after respective stress period plants were grown under optimal water regime. In all the fertilized and unfertilized treatments, NRA was significantly higher under optimal water regime than in drought stress conditions. Nitrogen fertilization alleviated adverse effects of drought stress on the yields of grain; the rate of 1 g N per pot increased the grain yield of plants stressed during tillering 3.73 times compared to unfertilized and stressed treatment. When the stress was induced during shooting or earing grain yields declined by over 50% compared to optimal water regime; when compared with stressed and unfertilized treatment, the rate of 1 g N however increased yield by 29% (stress at shooting) and 55% (stress at earing). NRA values were significantly higher when plants were grown under optimum water regime than under stress conditions as well as when fertilized with nitrogen compared to unfertilized control both under optimum water regime and drought stress.

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