Effects of shade nettings, sowing time and storage on baby spinach flavonoids

Bergquist, Sara; Gertsson, Ulla E.; Nordmark, L.; Olsson, Marie

doi:10.1002/jsfa.2956

Cited by 29 publications

(29 citation statements)

References 37 publications

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“…Carotenoids may also scavenge any singlet oxygen that forms during photosynthesis (Bergquist, 2006). The excess radiation generates reactive oxygen species that may cause photo inhibition if not scavenged, for example, by carotenoids (Bergquist et al, 2007). A strong and negative relation was noted between the intensity of shading and the relative chlorophyll content of leaves.…”

Section: Resultsmentioning

confidence: 99%

Effect of shading by coloured nets on yield and fruit quality of sweet pepper

Ilić

Milenković

Šunić

et al. 2017

Zemdirbyste-Agriculture

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The concept of photo-selective netting was studied in a sweet pepper (Capsicum annuum L.) cultivar 'Cameleon' from summer cultivation in south Serbia (under high solar radiation 910 W m -2 , with a photosynthetic photon flux density of 1661 µmol m -2 s -1 ), under four different coloured shade-nets (pearl, red, blue and black) with 40% relative shading. The aim of the study was to determine how different environmental control technologies, coloured shade-nets as net house or plastic-house integrated with coloured shade-nets, could influence plant parameters, production and quality traits in pepper fruits. Shade-grown leaves generally have higher total chlorophyll and carotenoid content than control leaves. Pericarp fruit thickness was significantly higher in peppers grown under red net house (4637.10 µm) and black net house (4609.32 µm) compared to the open field -control (3116.19 µm). The highest concentration of total soluble solids (TSS) was detected in pepper fruits grown under the open field conditions (8.03%). Pepper fruits grown in plastic tunnels had significantly lower TSS content (6.58%). Total acid (TA) content was 0.19 in the control and 0.25 in pepper fruits grown under red nets. The highest concentration of vitamin C was detected in peppers grown in plastic tunnels integrated with red coloured nets (175.77 mg 100 g -1 ). These results show that red and pearl photo-selective nets create optimal growing conditions and increase the total fruit yield as well as the number of fruits with fewer physiological disorders and with thicker pericarp. Photoselective pearl and red nets can be recommended for sweet pepper 'Cameleon' with respect to quality and bioactive compound and can furthermore be implemented in protected cultivation practices.

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Section: Resultsmentioning

confidence: 99%

Effect of shading by coloured nets on yield and fruit quality of sweet pepper

Ilić

Milenković

Šunić

et al. 2017

Zemdirbyste-Agriculture

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“…Flavonoids are the important secondary metabolites of plant and extensive bioactivities for medicine [1], and would be influenced by kinds of factors, such as harvesting times, ecology factors [2–4], shade nettings and sowing time [5], development [6], light transmittance paper bags [7]. Besides, sample pretreatment was the key process leading to alterations in the quantity and quality of bioactive compounds [8–10].…”

Section: Introductionmentioning

confidence: 99%

Effects of different pretreatments on flavonoids and antioxidant activity of Dryopteris erythrosora leave

Wang

Zhang

wang

et al. 2018

Preprint

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18Flavonoids with wide bioactivity for medcine are vital secondary metabolite of plant. The factors 19 influenced on flavonoids had been reported. However, as the key processes lead to metabolite 20 alterations, the influences of the different pretreatments of samples on flavonoids and antioxidant 21 activity of ferns were with little information. Therefore, Dryopteris erythrosora leaves were chosen 22 as the materials for analyzing flavonoids alterations, which would not only provide the significant 23 basic data for flavonoid metabolism of fern, but also for further developing fern resources. The 2 24 results showed that a) The total flavonoids contents of D. erythrosora leaves with different 25 pretreatments were obviously different. The total flavonoid contents of samples, which was dried in 26 shade firstly and then dried at 75 °C in oven, finally smashed, was the highest (7.6%), but that of 27 samples, which was quickly dried at 75 °C in oven directly after cleaning and then smashed, was the 28 lowest (2.17%); b) Antioxidant activities of D. erythrosora leaves with different pretreatments were 29 variant. Samples, which were dried in shade firstly and then dried at 75 °C in oven, finally smashed 30 and samples which were firstly dried in the sun and then dried at 75 °C in oven, ultimately smashed, 31 both showed stronger antioxidant activity; c) Total twenty-three flavonoids with four different 32 pretreatments were tentatively identified by HPLC-ESI-TOF-MS. In conlusion, a) The influences of 33 different pretreatments on flavonoids and antioxidant activity of D. erythrosora Leaves were 34 obvious. b) The best pretreatment in respect to conserving fern medical application was drying in 35 shade firstly and then drying at 75 °C in oven, finally smashed. 36

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“…UV-A lead to an increase in the accumulation of flavonoids in the study [98]. The level of flavonoid in baby spinach sown in August was not affected by shading, while that sown in April was affected by shading; with an increase in flavonoid accumulation in un-shaded leaves [71]. This might be due to the fact that increasing levels of UV-B radiation leads to accumulation of flavonoids.…”

Section: Effect Of Light Intensity On Flavonoid Accumulationmentioning

confidence: 79%

Effect of Light Quality and Quantity on the Accumulation of Flavonoid in Plant Species

Idris¹,

Linatoc

Bakar

et al. 2018

JST

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Light effects including its intensity, wavelength, and duration are important environmental factors that affects flavonoid accumulation. Ultraviolet (UV) light can induce flavonoid biosynthesis. Under normal condition, flavonoids are produced in response to stress, and they function as UV filters. In this paper, we review how light quality and quantity affect the accumulation of flavonoid in plant species. High light intensity can influence flavonoid accumulation, but in heliophytes, the opposite is true. Some medicinal plants require shady environment for flavonoid accumulation. In monocots, the flavonoid is situated in both epidermis and mesophyll while in dicot, it is found only in the epidermis. This review leads to a conclusion that high variation in flavonoids accumulation in response to light can occur within and between plant species.

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Effects of shade nettings, sowing time and storage on baby spinach flavonoids

Cited by 29 publications

References 37 publications

Effect of shading by coloured nets on yield and fruit quality of sweet pepper

Effect of shading by coloured nets on yield and fruit quality of sweet pepper

Effects of different pretreatments on flavonoids and antioxidant activity of Dryopteris erythrosora leave

Effect of Light Quality and Quantity on the Accumulation of Flavonoid in Plant Species

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