Effect of Organic and Conventional Cropping Systems on Ascorbic Acid, Vitamin C, Flavonoids, Nitrate, and Oxalate in 27 Varieties of Spinach (Spinacia oleracea L.)

2012 ◽  
Vol 60 (12) ◽  
pp. 3144-3150 ◽  
Author(s):  
Eunmi Koh ◽  
Suthawan Charoenprasert ◽  
Alyson E. Mitchell
Keyword(s):  
Ascorbic Acid ◽  
Vitamin C ◽  
Spinacia Oleracea ◽  
Cropping Systems ◽  
Spinacia Oleracea L

l-ascorbic acid metabolism in spinach (Spinacia oleracea L.) during postharvest storage in light and dark

2003 ◽  
Vol 28 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Merry Evelyn A Toledo ◽  
Yoshinori Ueda ◽  
Yoshihiro Imahori ◽  
Mitsuko Ayaki
Keyword(s):  
Ascorbic Acid ◽  
Acid Metabolism ◽  
Spinacia Oleracea ◽  
Postharvest Storage ◽  
Spinacia Oleracea L

scholarly journals The effect of foliar nutrition of spinach (Spinacia oleracea L.) with magnesium salts and urea on gas exchange, leaf yield and quality

2012 ◽  
Vol 63 (1) ◽  
pp. 77-86 ◽  
Author(s):  
Edward Borowski ◽  
Sławomir Michałek
Keyword(s):  
Gas Exchange ◽  
Vitamin C ◽  
Spinacia Oleracea ◽  
Leaf Gas Exchange ◽  
Magnesium Acetate ◽  
Control Treatment ◽  
Foliar Nutrition ◽  
Spinacia Oleracea L ◽  
Leaf Yield ◽  
Magnesium Salts

In a pot experiment conducted in a phytotron, the effectiveness of foliar nutrition of spinach (Spinacia oleracea L.) with different magnesium salts with and without the addition of 0.5% CO(NH<sub>2</sub>)<sub>2</sub> was studied. Magnesium was applied 3 times in the form of solutions of MgSO<sub>4</sub> x 7H<sub>2</sub>O, Mg(NO<sub>3</sub>)<sub>2</sub> x 6H<sub>2</sub>O, MgCl<sub>2</sub> x 6H<sub>2</sub>O, C<sub>4</sub>H<sub>6</sub>O<sub>4</sub>Mg x 4H<sub>2</sub>O, compared to water as the control treatment. The obtained results showed that foliar feeding of spinach with inorganic magnesium salts was an efficient method for supplementing the Mg level in plants during the growing period. But the application of a metalo-organic complex in the form of magnesium acetate (C<sub>4</sub>H<sub>6</sub>O<sub>4</sub>Mg x 4H<sub>2</sub>O) at a concentration of 1.7%, in spite of a similar effect on leaf Mg content, induced phytotoxic symptoms in the form of chlorotic and necrotic spots on the leaves. The application of the solutions of inorganic magnesium salts had a significant effect, resulting in more intensive leaf gas exchange (stomatal conductance, transpiration and photosynthesis) and an increase in leaf yield. Magnesium sulphate affected the abovementioned processes in the most effective way, while magnesium acetate had a negative impact. Foliar feeding of spinach with the magnesium salts resulted in an increased leaf content of protein, chlorophyll, carotenoids, nitrates and proline, but a decrease in vitamin C content. The addition of urea to the applied magnesium salt solutions increased the plant gas exchange rates and the leaf content of protein, chlorophyll, carotenoids, nitrates and proline, but it decreased the content of vitamin C, potassium and magnesium.

scholarly journals OPTIMAL POSTHARVEST STORAGE PARAMETERS AND SHELF LIFE OF BABY SPINACH (SPINACIA OLERACEA L.)

2015 ◽  
Author(s):  
Jonas VIŠKELIS ◽  
Marina RUBINSKIENĖ ◽  
Dalia URBONAVIČIENĖ ◽  
Ramunė BOBINAITĖ, ◽  
Pranas VIŠKELIS,
Keyword(s):  
Ascorbic Acid ◽  
Shelf Life ◽  
Storage Temperature ◽  
Spinacia Oleracea ◽  
Total Content ◽  
Visual Quality ◽  
Soluble Solids ◽  
Postharvest Storage ◽  
Spinacia Oleracea L ◽  
Biochemical Quality

This work was done to evaluate the optimal postharvest storage parameters and shelf life of baby spinach. Baby spinach (50 g) was sealed in three different polypropylene (PP) and polyethylene (PE) packaging materials: 30 m (PP), 35 m (PE) & 40 m (PE), and were stored in darkness for 3 and 9 days at 0 °C, 4 °C, 8 °C & 16 °C ( 1 °C). Total content of phenolics, soluble solids, nitrates, chlorophyll content, ascorbic acid & spinach color (CIEL*a*b*) were measured by standard methods after 3 and 9 days of storage. Baby spinach stored at 0  1 °C and 4  1 °C showed the best visual quality. Storage temperature had significant influence on spinach colour, but the influence of packaging was not so strong. The content of soluble solids, ascorbic acid and nitrates decreased during storage. The highest amount of ascorbic acid was retained when baby spinach were stored in 40 m PE bags at 0  1 °C. When baby spinach was stored at higher temperatures (4 °C, 8 °C & 16 °C), the decrease in the amount of ascorbic acid ranged from 55 % to 69 %. Baby spinach stored for 9 days at 0 °C & 4 °C showed high visual and biochemical quality. Higher amounts of soluble solids and ascorbic acid were found in spinach stored in 40 m PE bags. Keywords: postharvest storage, spinach, Spinacia oleracea L.

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