scholarly journals The Effect of Fertigation and Foliar Application of Seaweed’s Bio Stimulant on Banana Yield

2021 ◽  
Vol 3 (1) ◽  
pp. p1
Author(s):  
Edouard Tabet ◽  
Reem Al-Haf ◽  
Chadi Hosri ◽  
Zahi Zind ◽  
Lina Farah ◽  
...  
Keyword(s):  
Foliar Application ◽  
Ascophyllum Nodosum ◽  
Banana Fruit ◽  
South Lebanon ◽  
Shed Light

In order to shed light on the effect of the seaweed Ascophyllum nodosum (L.) bio stimulant on the banana fruit, foliar application (Fo), fertigation(F1) and a mix of both interventions (M) were done during 2018-2019 season on banana plants grown in South Lebanon compared with control (Ctrl). The period between flowering and harvest, the bunch weight, the weight and dimensions of fruit, were measured during the study. The results showed that the shortest period between flowering and harvest was observed on samples treated through foliar application (Fo), less with fertigation and then the mix of both (M). Those treatments were very effective in stimulating the weight of bunch and length of fruit, while a significant increase in the weight of fruit was noticed when both applications were done together (M). All treated modalities showed better performance compared with control. There was no difference in the diameter of fruit between all treatments. Therefore, the application of eco-friendly seaweed-based bio stimulant would be beneficial for the time of harvesting, and the size of banana fruits.

scholarly journals Influence of Ascophyllum nodosum extract, homobrassinolide and triacontanol on fruit retention, yield and quality of mango

2021 ◽  
Vol 42 (4) ◽  
pp. 1085-1091
Author(s):  
A. Dash ◽  
◽  
D. Samant ◽  
D.K. Dash ◽  
S.N. Dash ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Foliar Application ◽  
Block Design ◽  
Ascophyllum Nodosum ◽  
Quality Parameters ◽  
Fruit Weight ◽  
Fruit Growth ◽  
Yield And Quality ◽  
Randomized Block Design

Aim: To evaluate the efficacy of foliar application of Ascophyllum nodosum extract, homobrassinolide, and triacontanol for improving fruit retention, yield, and quality in mango. Methodology: The experiment was laid out in a randomized block design with 10 treatments, comprising Ascophyllum nodosum extract (1000, 3000, and 5000 ppm), homobrassinolide (0.1, 0.3, and 0.5 ppm), triacontanol (1, 3, and 5 ppm), and water as control. Treatments were foliar sprayed at panicle initiation, pea, and marble stages of fruit growth. Observations were recorded on flowering, fruiting, yield, and fruit quality parameters. Results: All the treatments of Ascophyllum nodosum extract and triacontanol exhibited significant improvement in fruit retention, fruit weight, yield, and fruit quality parameters over control. However, 3000 and 5000 ppm Ascophyllum nodosum extract treatments outperformed all the treatments of triacontanol. Plants sprayed with 5000 ppm Ascophyllum nodosum extract recorded the maximum value for fruit retention (48.15, 36.74, 29.48, and 25.76% at 3, 6, 9, and 12 weeks after pea stage, respectively), number of fruits (133.25 per tree), fruit weight (188.84 g per fruit), and yield (25.16 kg per tree), whereas the lowest values were recorded under control. With respect to fruit quality, 3000 ppm ANE produced the fruits with the highest TSS (19.62 °B), whereas the highest TSS/acid ratio was recorded with 5000 ppm ANE (62.29) treatment. Interpretation: In mango, foliar application of Ascophyllum nodosum extract (3000-5000 ppm) thrice at panicle initiation, pea, and marble stages of fruit growth is effective for reducing fruit drop and enhancing quantum and quality of produce.

scholarly journals Eco-Physiological Traits and Phenylpropanoid Profiling on Potted Vitis vinifera L. cv Pinot Noir Subjected to Ascophyllum nodosum Treatments under Post-Veraison Low Water Availability

2020 ◽  
Vol 10 (13) ◽  
pp. 4473 ◽  
Author(s):  
Linda Salvi ◽  
Cecilia Brunetti ◽  
Eleonora Cataldo ◽  
Paolo Storchi ◽  
Giovan Battista Mattii
Keyword(s):  
Water Stress ◽  
Secondary Metabolites ◽  
Vitis Vinifera ◽  
Foliar Application ◽  
Sampling Period ◽  
Ascophyllum Nodosum ◽  
Pinot Noir ◽  
Vitis Vinifera L ◽  
Irrigation Regimes ◽  
Berry Skins

In Mediterranean regions, extreme weather conditions during the growing season may alter grapevine physiology and metabolism, thus modifying the quality of wines. The objective of this study was to investigate the effects of Ascophyllum nodosum treatments on plant physiology and berry metabolism in Vitis vinifera exposed to water stress. The experiment was performed on potted vines subjected to two irrigation regimes (well-watered, WW, and water stressed, WS) both associated with A. nodosum treatments (SWE), compared with control plants (CTRL). Gas exchanges, chlorophyll fluorescence, and water relations were monitored on SWE and CTRL leaves, both in WW and WS vines at three times. Moreover, the quantification of secondary metabolites and their partitioning were performed in berry skins. Plants treated with A. nodosum extract showed higher photosynthesis and stomatal conductance than CTRL in both irrigation regimes and maintained a better plant hydraulic conductivity at the end of the sampling period. In addition, secondary metabolites in berry skins and their partitioning were significantly affected by the treatments in both irrigation regimes. Our results suggest that foliar application of A. nodosum extract may help the acclimation of grapevines to post-veraison water stress, likely improving plant physiological and biochemical performances under environmental constraints.

scholarly journals Effects of Chelidonium majus and Ascophyllum nodosum Extracts on Growth and Photosynthesis of Soybean

2020 ◽  
Vol 73 (1) ◽  
Author(s):  
Juhie Joshi-Paneri ◽  
Guy Chamberland ◽  
Danielle Donnelly
Keyword(s):  
Photosynthetic Rate ◽  
Foliar Application ◽  
Ascophyllum Nodosum ◽  
Dry Mass ◽  
Growth And Yield ◽  
Separate Experiment ◽  
Herbal Extracts ◽  
Chelidonium Majus ◽  
Shoot Height ◽  
Synthetic Chemicals

Herbal extracts used in agriculture are formulated from plants (or other organisms) as alternatives to synthetic chemicals that could have adverse effects on growers, consumers, or the environment. In this study, the effects of two herbal extracts on soybean were assessed: <em>Chelidonium majus</em> (C7: Celext 07) and <em>Ascophyllum nodosum</em> (ST: Stimulagro). A standardized approach for germinating seeds and monitoring early seedling growth for 15 days (SOP-Soybean) was used to evaluate the effects of these extracts. Growth characteristics, chlorophyll content, and photosynthetic rate were measured on the fifteenth day after sowing (DAS). A combination of <em>C. majus</em> and <em>A. nodosum</em> (C7+ST), both 1 g L<sup>−1</sup>, was the most beneficial treatment and significantly increased shoot height (13.2%), dry mass (10.7%), and photosynthetic rate (20.3%). In a separate experiment, foliar application of the same compounds was performed on the tenth and twentieth DAS, with sampling on the thirtieth DAS. Foliar applications with 1 g L<sup>−1</sup> of <em>A. nodosum</em> (ST) significantly enhanced the dry mass (23.5%), and the photosynthetic rate was increased even at 10 days after application (22.5%). Therefore, seedling exposure to <em>C. majus</em> (C7) and <em>A. nodosum</em> (ST) and foliar applications of <em>A. nodosum</em> (ST) stimulated the growth and development of soybean. These natural compounds seem to have the potential to act as growth stimulants for soybean and should be tested for their capacity to improve field growth and yield.

scholarly journals Potential Use of Ascophyllum nodosum as a Biostimulant for Improving the Growth Performance of Vigna aconitifolia (Jacq.) Marechal

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2361
Author(s):  
Nidhi Verma ◽  
Krishnan D. Sehrawat ◽  
Poonam Mundlia ◽  
Anita R. Sehrawat ◽  
Ravish Choudhary ◽  
...  
Keyword(s):  
Foliar Application ◽  
Ascophyllum Nodosum ◽  
Organic Content ◽  
Vigna Aconitifolia ◽  
Biochemical Processes ◽  
Positive Growth ◽  
Moisture Percentage ◽  
Bioactive Ingredients ◽  
Physiological And Biochemical ◽  
Potential Use

The fertilizers that are derived from seaweed are known as Seaweed Liquid Fertilizers (SLF). SLF is a modern, cheap, non-toxic, and natural bioactive fertilizer. Among different studied seaweeds, Ascophyllum nodosum is significant as having bioactive ingredients that potentially regulate the molecular, physiological, and biochemical processes of crop plants. In the present study, the effects of the application of different concentrations (0.00%, 0.01%, 0.02%, 0.05%, 0.10%, 0.50%, and 1.00%) of A. nodosum Extract (ANE) to the Vigna aconitifolia through roots (Pot Root Application, PRA) and on the leaves (Pot Foliar Application, PFA) were monitored via the plant growth. The lower concentrations of ANE in both the PRA and PFA experiments showed positive growth on V. aconitifolia. The 0.10% ANE stimulated the maximum shoot growth when applied through the roots, while 0.05% ANE in both PFA and PRA experiments led to an increase in the number of pods, nodules, organic content, and moisture percentage. The 0.10% ANE also increased the leaf numbers, leaf area, and photosynthetic pigments. Hence, the application of 0.05% and 0.10% of A. nodosum extract in two ways (i.e., Pot Foliar Application, PFA, and Pot Root Application, PRA) ameliorated the growth capabilities of V. aconitifolia.

scholarly journals A Biostimulant Obtained from the Seaweed Ascophyllum nodosum Protects Arabidopsis thaliana from Severe Oxidative Stress

2020 ◽  
Vol 21 (2) ◽  
pp. 474 ◽  
Author(s):  
Mohammad Amin Omidbakhshfard ◽  
Neerakkal Sujeeth ◽  
Saurabh Gupta ◽  
Nooshin Omranian ◽  
Kieran J. Guinan ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Arabidopsis Thaliana ◽  
Cell Death ◽  
Foliar Application ◽  
Tricarboxylic Acid Cycle ◽  
Ascophyllum Nodosum ◽  
Marker Genes ◽  
Lipidome Analysis ◽  
Tricarboxylic Acid Cycle Intermediates ◽  
Carbohydrate Metabolism Genes

Abiotic stresses cause oxidative damage in plants. Here, we demonstrate that foliar application of an extract from the seaweed Ascophyllum nodosum, SuperFifty (SF), largely prevents paraquat (PQ)-induced oxidative stress in Arabidopsis thaliana. While PQ-stressed plants develop necrotic lesions, plants pre-treated with SF (i.e., primed plants) were unaffected by PQ. Transcriptome analysis revealed induction of reactive oxygen species (ROS) marker genes, genes involved in ROS-induced programmed cell death, and autophagy-related genes after PQ treatment. These changes did not occur in PQ-stressed plants primed with SF. In contrast, upregulation of several carbohydrate metabolism genes, growth, and hormone signaling as well as antioxidant-related genes were specific to SF-primed plants. Metabolomic analyses revealed accumulation of the stress-protective metabolite maltose and the tricarboxylic acid cycle intermediates fumarate and malate in SF-primed plants. Lipidome analysis indicated that those lipids associated with oxidative stress-induced cell death and chloroplast degradation, such as triacylglycerols (TAGs), declined upon SF priming. Our study demonstrated that SF confers tolerance to PQ-induced oxidative stress in A. thaliana, an effect achieved by modulating a range of processes at the transcriptomic, metabolic, and lipid levels.

ANDREA NÜSSE, Muslim Palestine: The Ideology of Hamas (Amsterdam: Harwood Academic Publishers, 1998). Pp. 203. $22.00 paper.

2001 ◽  
Vol 33 (1) ◽  
pp. 139-141
Author(s):  
MOHAMMED M. HAFEZ
Keyword(s):  
Gulf War ◽  
Comprehensive Analysis ◽  
The West ◽  
Self Image ◽  
The Social ◽  
Original Contribution ◽  
South Lebanon ◽  
West Bank And Gaza ◽  
Islamist Movement ◽  
Shed Light

In a modest but original contribution to the literature on the Islamist movement in the West Bank and Gaza, Andrea Nüsse explores the ideology of the key player in this movement: Hamas. Nüsse analyzes Hamas's system of thought, particularly how it frames its struggle against Israel; the arguments it employs to oppose the peace process; and its use of Qur[ham]anic exegeses to underpin its militant, or jihadist, stance. The author avoids such issues as the structure of the organization and the social base of its constituency, which have been explored elsewhere. Instead, she relies on primary material to address the goals, strategy, ideological foundations, self-image, and perceived enemies of the movement. In addition to these themes, the author presents Hamas's perspective on contemporary historical events and developments, including the Gulf War of 1990–91, the mass deportation of Islamists to South Lebanon in 1992, and the Hebron massacre of 1994. The aim throughout the book is to shed light on an under-studied aspect of the movement, leaving it up to the reader to seek out other writings that give a more comprehensive analysis.

scholarly journals Exploratory Study on the Foliar Incorporation and Stability of Isotopically Labeled Amino Acids Applied to Turfgrass

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 358
Author(s):  
Rachel M. McCoy ◽  
George W. Meyer ◽  
David Rhodes ◽  
George C. Murray ◽  
Thomas G. Sors ◽  
...  
Keyword(s):  
Amino Acids ◽  
Time Course ◽  
Foliar Application ◽  
Plant Stress ◽  
Creeping Bentgrass ◽  
Isotopic Labeling ◽  
Specialty Crops ◽  
A Minor ◽  
Precursor Molecules ◽  
Shed Light

There is increasing interest in the use of amino acid-based biostimulant products due to their reported abilities to improve a number of quality characteristics in a variety of specialty crops. However, when it comes to the foliar application of amino acids to turfgrass, there are still many basic questions about their uptake forms and incorporation into cellular metabolism. In this study, we shed light on the fate of amino acids exogenously applied to turfgrass foliage through a series of time-course, isotopic-labeling studies in creeping bentgrass (Agrostis stolonifera L.) leaves. Using both 15N-labeled and 15N,13C double-labeled L-glutamate applied exogenously to creeping bentgrass foliage, we measured the uptake of glutamate and its integration into γ-aminobutyric acid (GABA) and L-proline, two amino acids with known roles in plant stress adaptation. Our results demonstrate that glutamate is rapidly absorbed into creeping bentgrass foliage and that it is utilized to produce GABA and proline. Based on the labeling patterns observed in the endogenous pools of glutamate/glutamine, GABA, and the proline from applied glutamate-[13C515N1], we can further conclude that glutamate is predominantly taken up intact and that mineralization into other forms of nitrogen is a minor fate. Taken together, the collective findings of this study provide evidence that amino acids exogenously applied to turfgrass foliage can be rapidly absorbed, and serve as stable sources of precursor molecules to be integrated into the metabolism of the plant.

scholarly journals Seaweed Extract, Humic Acid, and Propiconazole Improve Tall Fescue Sod Heat Tolerance and Posttransplant Quality

HortScience ◽  
2003 ◽  
Vol 38 (3) ◽  
pp. 440-443 ◽  
Author(s):  
Xunzhong Zhang ◽  
E.H. Ervin ◽  
R.E. Schmidt
Keyword(s):  
Humic Acid ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Foliar Application ◽  
Photochemical Efficiency ◽  
Ascophyllum Nodosum ◽  
High Temperature Stress ◽  
Heat Injury ◽  
Root Strength

Decline of sod quality during the transportation, storage, and transplant stages of sale is a primary economic concern of sod producers. However, the mechanisms of extending sod quality during storage, transportation, and transplantation remain unclear. This study was conducted to investigate the influences of selected plant metabolic enhancers (PMEs) seaweed (Ascophyllum nodosum Jol.) extract (SWE), humic acid [93% a.i. (HA)], and propiconazole (PPC), on sod tolerance to stress during storage and posttransplant root growth of tall fescue (Festuca arundinacea Schreb.) sod. The SWE + HA, and PPC were applied alone, or in a combination, to tall fescue 2 weeks before harvest. Photochemical efficiency (PE) of photosystem II was measured immediately before harvest. The harvested sod was subjected to high temperature stress (40 °C) for 72 or 96 hours. The heated sod was replanted in the field and posttransplant injury and root strength were determined. On average over 1999 and 2000, application of SWE (50 mg·m-2) + HA (150 mg·m-2), PPC (0.30 mL·m-2), and a combination of SWE + HA with PPC (0.15 mL·m-2), enhanced PE of preharvest sod by 8.5%, 9.1%, and 11.2%, respectively, and increased posttransplant rooting by 20.6%, 34.6%, and 20.2%, respectively. All PME treatments reduced visual injury except SWE + HA and SWE + HA + PPC in 1999. Extension of heat duration from 72 to 96 hours caused significantly more injury to the sod and reduced posttransplant rooting by 22.9% averaged over 2 years. The data suggest that foliar application of SWE + HA, PPC alone, or in a combination with SWE + HA, may reduce shipment heat injury and improve posttransplant rooting and quality of tall fescue sod. Chemical name used: 1-(2-(2,4-dichloropheny)-4-propyl-1,3-dioxolan-2yl)methyl-1-H-1,2,4-triazole [propiconazole (PPC)].

Elucidating cyclic AMP signaling in subcellular domains with optogenetic tools and fluorescent biosensors

2019 ◽  
Vol 47 (6) ◽  
pp. 1733-1747 ◽  
Author(s):  
Christina Klausen ◽  
Fabian Kaiser ◽  
Birthe Stüven ◽  
Jan N. Hansen ◽  
Dagmar Wachten
Keyword(s):  
Cyclic Amp ◽  
Adenosine Monophosphate ◽  
Adenylyl Cyclases ◽  
Temporal Precision ◽  
Fluorescent Biosensors ◽  
Subcellular Domains ◽  
Spatio Temporal ◽  
Hydrolysis Of ◽  
Shed Light ◽  
Cyclic Amp Signaling

The second messenger 3′,5′-cyclic nucleoside adenosine monophosphate (cAMP) plays a key role in signal transduction across prokaryotes and eukaryotes. Cyclic AMP signaling is compartmentalized into microdomains to fulfil specific functions. To define the function of cAMP within these microdomains, signaling needs to be analyzed with spatio-temporal precision. To this end, optogenetic approaches and genetically encoded fluorescent biosensors are particularly well suited. Synthesis and hydrolysis of cAMP can be directly manipulated by photoactivated adenylyl cyclases (PACs) and light-regulated phosphodiesterases (PDEs), respectively. In addition, many biosensors have been designed to spatially and temporarily resolve cAMP dynamics in the cell. This review provides an overview about optogenetic tools and biosensors to shed light on the subcellular organization of cAMP signaling.

Sentence-Based Experience Logging in New Hearing Aid Users

2020 ◽  
Vol 29 (3S) ◽  
pp. 631-637
Author(s):  
Katja Lund ◽  
Rodrigo Ordoñez ◽  
Jens Bo Nielsen ◽  
Dorte Hammershøi
Keyword(s):  
Hearing Aid ◽  
Patient Experiences ◽  
Online Tool ◽  
Rehabilitation Process ◽  
Hearing Rehabilitation ◽  
Clinical Observations ◽  
Hearing Aid Use ◽  
Wide Range ◽  
Insight Into ◽  
Shed Light

Purpose The aim of this study was to develop a tool to gain insight into the daily experiences of new hearing aid users and to shed light on aspects of aided performance that may not be unveiled through standard questionnaires. Method The tool is developed based on clinical observations, patient experiences, expert involvement, and existing validated hearing rehabilitation questionnaires. Results An online tool for collecting data related to hearing aid use was developed. The tool is based on 453 prefabricated sentences representing experiences within 13 categories related to hearing aid use. Conclusions The tool has the potential to reflect a wide range of individual experiences with hearing aid use, including auditory and nonauditory aspects. These experiences may hold important knowledge for both the patient and the professional in the hearing rehabilitation process.

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