The effect of marine bioactive substances (N PRO) and exogenous cytokinins on nitrate reductase activity in <i>Arabidopsis thaliana</i>

Durand, Nathalie; Briand, Xavier; Meyer, Christian

doi:10.1046/j.1399-3054.2003.00207.x

Cited by 83 publications

(55 citation statements)

References 28 publications

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“…This approach permits the identification of specific genes or suites of genes that may be either up-or down-regulated when an organism is challenged with a seaweed extract or a bioactive subfraction of it. Two well-studied classical organisms, the flowering plant, A. thaliana, and the nematode, Caenorhabditis elegans, are among the valuable biological tools being newly used with seaweed extracts to investigate biological responses (Durand et al 2003;Fan et al 2010;Rayorath et al 2008). The genomes of these organisms have been mapped and their cell ontogenies described (C. elegans Sequencing Consortium 1998; Ceron and Swoboda 2008; The Arabidopsis Genome Initiative 2000; Theologis et al 2000).…”

Section: Bioassaysmentioning

confidence: 99%

Seaweed extract stimuli in plant science and agriculture

2010

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Both micro-and macroalgae have long been used to augment plant productivity and food production in various regions of the world through their beneficial effects when applied to soils. Interactions of algae with the soil community undoubtedly are complex and benefits are dependent on the crop and the local environmental conditions. This has resulted in much speculation as to mechanisms involved as well as the validity of the results reported. It is now 60 years since the first commercial seaweed extract was manufactured for agricultural use. These aqueous extracts allowed for the first time the direct application of soluble seaweed constituents to specific plant organs such as leaves and roots. The earlier concept that benefits of seaweeds and their extracts were due mainly to their manurial value or to their micronutrient suites is no longer tenable. Seaweeds likewise have been used for millennia as fodder supplements to improve animal nutrition and productivity. Recent research is focusing on their mode of action, specific health benefits, and the mechanisms of action in animals. Improved analytical techniques and instrumentation coupled with the use of molecular genetic tools are establishing that seaweed extracts can modify plant and animal responses at a fundamental level. It therefore seems appropriate to review key developments over the years and to remark on novel findings. A new and exciting vista has opened for seaweed extracts in both plant and animal applications.

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Section: Bioassaysmentioning

confidence: 99%

Seaweed extract stimuli in plant science and agriculture

2010

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“…The decomposition of the algae is taken in charge by micro-organisms that degrade the algae into carbon dioxide, water and nutritious substances for the algae (mineralization). Seaweed also tend to enrich the medium with hormones such as cytokinins (Durand et al, 2003), auxins , gibberellins (Wildgoose et al, 1978) and betaines (Blunden and Gordon, 1986;Whapham et al, 1993). They contain in addition, precursors of compounds elicitors that promote germination, growth and maintenance of plant health (Kloareg et al, 1996).…”

Section: Degradation and Water Holding Capacitymentioning

confidence: 99%

Evaluation of brown seaweed (Padina pavonica) as biostimulant of plant growth and development

Chbani¹,

Mawlawi²,

Zaouk³

2013

Afr. J. Agric. Res.

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An innovative horticulture nutrient and biodegradable support is described in this paper for replacing plastic culture pots. This support is prepared with Luffa aegyptica, plant having a water holding capacity higher than that of the regular soil and that is also biodegradable. Brown seaweed Padina pavonica was incorporated as an organic fertilizer of plant growth. Chemical analysis of the aqueous extract of this alga showed the presence of macronutrients such as nitrogen (N), phosphorus (P) and potassium (K) necessary for development and growth of plants. Agar-agar was added as a solidifying agent. A medium containing only soil and another containing soil with chemical fertilizer served as controls. Sunflower seeds grown in medium supplemented with brown seaweed; (P. pavonica + agar (4% or 6%) + L. aegyptica have a growth rate (length and diameter of the stem, number of leaves) that is slower than the plants grown in a medium with a comparable amount of the soil with chemical fertilizer. However, the plants in the soil and others in the soil with chemical fertilizer and the media (seaweed + L. aegyptica + agar 4%) have not completed their growth while the plants grown in the media (seaweed + L. aegyptica + agar 6%) continued to grow. A biodegradability test showed that a piece of support (seaweed + agar 1.5% + L. aegyptica) presented a degradation rate higher than the support with only Luffa and agar 1.5%, while a piece of plastic had not degraded. The results of our study have shown that this support has helped to extend the duration of growth and enhanced the quality of the plants. Ultimately, the fabricated support presented fertilizer properties, water retention and biodegradability and could serve in horticulture as an alternative to plastic pots and chemical fertilizer.

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“…In recent years, the use of natural seaweeds as fertilizer (Hong et al 2007) has allowed for substitution in place of conventional synthetic fertilizer (Crouch and van Staden 1993). Seaweeds extracts are marketed as liquid fertilizers and biostimulants since they contain many growth regulators such as cytokinins (Durand et al 2003;Stirk et al 2003), auxins (Stirk et al 2004), gibberellins (Wildgoose et al 1978), betaines Wu et al 1997), macronutrients such as Ca, K, P, and micronutrients like Fe, Cu, Zn, B, Mn, Co, and Mo (Khan et al 2009), necessary for the development and growth of plants. Seaweeds and seaweed extracts also enhance soil health by improving moisture holding capacity (Moore 2004) and by promoting the growth of beneficial soil microbes (Khan et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Effect of seaweed liquid extract on growth and yield of Triticum aestivum var. Pusa Gold

2011

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The effect of seaweed liquid extract (SLE) of Sargassum wightii on germination, growth and yield of Triticum aestivum var. Pusa Gold was studied. Application of a lower concentration (20%) of SLE enhanced the percentage of seed germination, growth and yield, as measured by kernel number and seed dry weight. All growth and yield parameters were found to be highest at the 20% concentration SLE treatment. Total (100%) seed germination was observed for the 20% concentration SLE treatment, an 11% increase over the control. The present study demonstrated that seaweed liquid extract could serve as an alternative biofertilizer as is eco-friendly, cheaper, deliver substantial economic and environmental benefits to farmers.

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The effect of marine bioactive substances (N PRO) and exogenous cytokinins on nitrate reductase activity in Arabidopsis thaliana

Cited by 83 publications

References 28 publications

Seaweed extract stimuli in plant science and agriculture

Seaweed extract stimuli in plant science and agriculture

Evaluation of brown seaweed (Padina pavonica) as biostimulant of plant growth and development

Effect of seaweed liquid extract on growth and yield of Triticum aestivum var. Pusa Gold

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