Effect on yield, total phenolic, total flavonoid and total isothiocyanate content of two broccoli cultivars (Brassica oleraceae var italica) following the application of a commercial brown seaweed extract (Ascophyllum nodosum)

Lola-Luz, Theodora; Hennequart, Franck; Gaffney, Michael

doi:10.23986/afsci.8832

Cited by 59 publications

(33 citation statements)

References 26 publications

(35 reference statements)

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“…Foliar sprays at the mid‐ripening stage (MR stage) could modulate biosynthesis of anthocyanins and phenolics, and increase their concentration until harvest, anticipating the achievement of the final concentration of different metabolites. This confirms and explains previous findings of various authors who increased anthocyanins, flavonoids and phenolic compounds in tissues of different plants subjected to applications of A. nodosum extract …”

Section: Discussionsupporting

confidence: 93%

Metabolic and transcriptional changes associated with the use ofAscophyllum nodosumextracts as tools to improve the quality of wine grapes (Vitis viniferacv. Sangiovese) and their tolerance to biotic stress

et al. 2019

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BACKGROUND Recent studies report that Ascophyllum nodosum extracts, once applied on the canopy of different crops, deliver positive effects, increasing yield, inducing tolerance to biotic stress, and improving the quality of products. However, the mechanisms of action are still unclear. In this research, vines subjected to multiple foliar applications of an A. nodosum extract (ANE) at label doses were compared with untreated vines (NTV) in accordance with a comparative approach. The investigation coupled a field experiment with a second trial conducted under semi‐controlled conditions, to clarify the mechanisms of action involved. RESULTS The biostimulant did not affect soluble solids or the acidity of grapes; instead, it improved their anthocyanin and phenolic concentrations and the respective profiles. At the time of harvest, anthocyanin, and phenolic concentration were increased by 10.4% and 14.5%, respectively, when compared to the NTV. These effects correlated with a specific modulation of genes involved in the flavonoid metabolic pathways. Moreover, grapes from ANE vines witnessed a significant reduction in the spreading of gray mold when they were either assessed in field conditions or in vitro, compared to the grapes of NTV vines. This was related to a significant upregulation of the defense‐related genes of the plant. CONCLUSIONS Overall, the results showed that A. nodosum extracts can be valuable tools in viticulture considering the emergence of challenging environmental conditions; hence, the regulation of specific metabolic pathways is the mechanism of action that leads to an increased tolerance of biotic stress and of changes in the content of grape metabolites. © 2019 Society of Chemical Industry

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Section: Discussionsupporting

confidence: 93%

Metabolic and transcriptional changes associated with the use ofAscophyllum nodosumextracts as tools to improve the quality of wine grapes (Vitis viniferacv. Sangiovese) and their tolerance to biotic stress

et al. 2019

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“…The recorded increase in the total phenolic compounds in the seaweed primed-stressed radish plants is in harmony with the results of Lola-Luz et al (2014), who reported that seaweed extract resulted in increasing of total phenolic compounds in broccoli. This increase could be due to osmotic stress or an increase in plant hormone activities.…”

Section: Discussionsupporting

confidence: 89%

Seed Priming with Extracts of two Seaweeds Alleviates the Physiological and Molecular Impacts of Salinity Stress on Radish (Raphanus sativus)

Kasim¹,

Saad‐Allah²,

Hamouda³

2016

IJAB

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To cite this paper: Kasim, W.A., K.M. Saad-Allah and M. Hamouda, 2016. Seed priming with extracts of two seaweeds alleviates the physiological and molecular impacts of salinity stress on radish (Raphanus sativus AbstractSeeds of radish were primed with the extract of either Codium taylorii or Pterocladia capillacea for 2 h, then sown in claysandy soil and left to grow under the effect of either 150 or 200 mM NaCl, however the control treatment was irrigated only with tap water, for 35 days. The results indicated that salinity decreased water content, shoot length, photosynthetic pigments and total lipids, while it increased total soluble proteins, proline, phenolic compounds and alkaloid contents. Priming with C. taylorii or P. capillacea alleviated the adverse effects of salinity on radish seedlings. Under 150 and 200 mM NaCl treatments, 5 bands with molecular weights 40, 70, 80, 100 and 171 kDa were newly synthesized as stress proteins, while that of the salt stressed seedlings primed with seaweed extracts showed appearance of four new bands with molecular weights 4, 15, 21 and 44 kDa with C. taylorii and 5, 6, 23 and 149 kDa with P. capillacea. The data of the ISSR analysis produced by five different primers reflected the appearance of seven new bands with the treatment 150 and 200 mM NaCl, and there was a disappearance of eight other bands. Priming of radish seeds with seaweed extract and treated with 150 and 200 mM NaCl resulted in the disappearance of five other bands. It might be concluded that the priming in seaweed extracts could represent a useful and powerful tool in alleviating salinity stress.

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“…According to some authors, application of biostimulants leads to an increase in the levels of phenolic compounds in the edible plant parts (Lola-Luz et al 2013, Ertani et al 2014). Most of the described studies, however, discuss their concentrations immediately after harvest (Lola-Luz et al 2014). However, the research on the effects of biostimulants on the levels of phenolic compounds in vegetables during storage has been very limited.…”

Section: Introductionmentioning

confidence: 99%

Influence of biostimulants on phenolic content in broccoli heads directly after harvest and after storage

Kałużewicz

Gąsecka

Spiżewski

2017

Folia Horticulturae

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Biostimulants are commonly used in horticulture, primarily to increase yield quantity and quality, as well as plant tolerance to stress. The purpose of the study was to determine the effect of amino acid-based biostimulants and amino acids in combination with Ascophyllum nodosum filtrate, applied during the growing season on the phenolic content in broccoli heads both after harvest and after long storage in a cold store. The seedlings were planted in mid-July, and heads were harvested from September to October in each year of the study. Ascophyllum nodosum filtrate at a concentration of 1% was used during seedling production. The plants were watered with biostimulants twice, in the fourth and fifth week after sowing. They were also sprayed with amino acid-based biostimulants (1.5 dm 3 ha -1) three times, i.e. after the second, fourth and sixth week after planting. The biostimulants were not used in the control treatment. After harvest, the heads were stored for three weeks in a cold store at 1-2°C and 95% RH. Chemical analyses of total phenolic, caffeic, ferulic and sinapic acids, and of quercetin and kaempferol were carried out on samples of fresh broccoli and after the first, second and third week of storage. It was found that the application of biostimulants resulted in a significant increase in the total phenolic content, sinapic acid content, as well as quercetin content. Both in the control treatment and in the plants treated with the biostimulants, the concentration of all the tested phenolic compounds increased with the duration of storage.Ke y wor d s: amino acids, Ascophyllum nodosum filtrate, Brassica oleracea var. italica, kaempferol, phenolic acids, quercetin

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Effect on yield, total phenolic, total flavonoid and total isothiocyanate content of two broccoli cultivars (Brassica oleraceae var italica) following the application of a commercial brown seaweed extract (Ascophyllum nodosum)

Cited by 59 publications

References 26 publications

Metabolic and transcriptional changes associated with the use ofAscophyllum nodosumextracts as tools to improve the quality of wine grapes (Vitis viniferacv. Sangiovese) and their tolerance to biotic stress

Metabolic and transcriptional changes associated with the use ofAscophyllum nodosumextracts as tools to improve the quality of wine grapes (Vitis viniferacv. Sangiovese) and their tolerance to biotic stress

Seed Priming with Extracts of two Seaweeds Alleviates the Physiological and Molecular Impacts of Salinity Stress on Radish (Raphanus sativus)

Influence of biostimulants on phenolic content in broccoli heads directly after harvest and after storage

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