Abscisic acid, gibberellins and brassinosteroids in Kelpak®, a commercial seaweed extract made from Ecklonia maxima

Stirk, Wendy A.; Tarkowská, Danuše; Turečová, Veronika; Strnad, Miroslav; Staden, J. Van

doi:10.1007/s10811-013-0062-z

Cited by 178 publications

(97 citation statements)

References 34 publications

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“…Apart from these, polyamines, gibberellins, brassinosteroids, phlorotannins and low concentrations of abscisic acid are also present in Kelpak SL. The use of Ecklonia maxima extract, which contains natural PGRs, in growing crops beneficially affects their growth and yield, in particular under biotic and abiotic stress conditions (Papenfus et al, 2012;Stirk et al, 2014;Rengasamy et al, 2015a). This is confirmed by numerous studies conducted on horticultural and agricultural crops (Ambika and Sujatha, 2016;Calvo et al, 2014;Kavitha et al 2008;Kocira et al, 2013;Saravanan et al 2003 (Kavipriya et al, 2011;Kumar and Sahoo, 2011;Latique et al, 2013;Rathore et al, 2009;Raverkar et al, 2016;Thirumaran et al, 2009;Zodape et al, 2010).…”

Section: Introductionmentioning

confidence: 84%

Effects of seaweed extract on yield and protein content of two common bean (Phaseolus vulgaris L.) cultivars

Kocira

Kornas

et al. 2017

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An experiment was conducted to investigate into the effects of Ecklonia maxima extract (Kelpak SL) on yield, protein and ash contents of two bean cultivars. The study was carried out in 2012 -2014 in Poland. During the growing season, 0.2% and 0.4% solutions of the bio-stimulant were applied by single and double spraying of plants against a control. The highest number and weight of grains were found when the plants of 'Toska' cultivar were single sprayed with 0.2% seaweed extract. Double spraying the plants with the 0.4% solution of Kelpak SL increased the number, its weight and the number of pods in cultivar 'Aura'. The application of Kelpak SL increased protein content of grains in both bean cultivars. Higher the dose the double foliar application of the bio-stimulant, more was the ash content of the grain of plants of 'Toska' cultivar.

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Section: Introductionmentioning

confidence: 84%

Effects of seaweed extract on yield and protein content of two common bean (Phaseolus vulgaris L.) cultivars

Kocira

Kornas

et al. 2017

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“…This decline could be attributed to stressful conditions induced by the exogenous application of specific natural products to the culture medium. Natural products Table 1 for a description) may contain non-growth promoting compounds, such as abscisic acid, inhibitors of gibberellin synthesis or ethylene inactivators, which can enhance stress (Ragonezi et al 2010;Stirk et al 2014). On the other hand, stress encountered during early stages of adventitious rhizogenesis may lead to reprogramming of cells making them competent to respond to rooting stimuli (da Costa et al 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Root-promoting substances may contain purified active compounds, but also either defined or undefined mixtures of organic supplements, such as algae extracts, plant extracts and cell exudates, as well as microbial components (Serna et al 2012;Pacholczak et al 2012a, b;Stirk et al 2014). Studies confirmed that natural biopreparations may stimulate the development of plant organs, with a limited influence on the environment (Pacholczak et al 2012a, b;Okunlola and Ofuya 2013).…”

Section: Introductionmentioning

confidence: 99%

Rooting response of Prunus domestica L. microshoots in the presence of phytoactive medium supplements

Wiszniewska

Nowak

Kołton

et al. 2016

Plant Cell Tiss Organ Cult

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The study aimed at evaluating the response of common plum (Prunus domestica L.) microshoots during in vitro rooting in the presence of two phytoactive medium supplements, i.e. a dialyzate of pineapple pulp and a conditioned medium containing green algae Desmodesmus subspicatus exudates. Rooting efficiency was evaluated after 4 weeks of culture. During the root induction phase the content of phenolic compounds in shoot bases was determined and anatomical studies were conducted. Medium supplements were analyzed for the content of carbohydrates and phenolic acids. Both supplements were efficient in rooting induction of shoots of a difficult-to-root cultivar 'Węgierka Zwykła'. Medium supplementation allowed a significant reduction in the exogenous auxin content required for rooting. The highest rooting efficiencies on supplemented media were 28.9 and 27.8 %, in comparison with 33.3 % obtained in the control medium with doubled concentration of exogenous auxins. In the easy-to-root plum cultivar 'Węgierka Dąbrowicka' the rooting rate was slightly reduced in the presence of pineapple dialyzate, while in the presence of algal conditioned medium the rooting rate decreased substantially compared with the nonsupplemented medium. Approximately 30 % of 'Węgierka Dąbrowicka' shoots rooted on supplemented auxin-free media. The content of phenolic compounds accumulated in shoot bases during the root induction stage reflected the differences in rooting ability between both plum cultivars, indicating potential stressful conditions of the culture generated by the presence of phytoactive natural supplements. Anatomical study allowed to recognize the mode of dedifferentiation leading to adventitious rhizogenesis in the common plum. The results are discussed in relation to the composition of medium supplements and their potential root-promoting activity.

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“…One of the main components of seaweed extracts are polysaccharides, which account for 30-40% of the dry matter (Rayorath et al 2009). In addition, seaweed extracts are a rich source of phytohormones such as auxins, cytokinins, gibberellins, abscisic acid and brassinosteroids (Stirk et al 2014), and polyphenol compounds (Holdt and Kraan 2011). Because of the antioxidant content, they enhance the resistance of plants to stress (Ertani et al 2011).…”

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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Abscisic acid, gibberellins and brassinosteroids in Kelpak®, a commercial seaweed extract made from Ecklonia maxima

Cited by 178 publications

References 34 publications

Effects of seaweed extract on yield and protein content of two common bean (Phaseolus vulgaris L.) cultivars

Effects of seaweed extract on yield and protein content of two common bean (Phaseolus vulgaris L.) cultivars

Rooting response of Prunus domestica L. microshoots in the presence of phytoactive medium supplements

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

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