scholarly journals Growth, Photosynthesis and Quality of Water Spinach (Ipomoea aquatica) as Influenced by Magnetic Nanoparticles (MNP) Application

2019 ◽  
pp. 1-15
Author(s):  
Rukhsar- E- Rashim Mohammed Yusufirashim ◽  
Mohd Hafiz Ibrahim ◽  
Che Azurahanim Che Abdullah ◽  
Ayu Azera Izad
Keyword(s):  
Magnetic Nanoparticles ◽  
Photosystem Ii ◽  
Total Phenolics ◽  
Carbon Assimilation ◽  
Maximum Efficiency ◽  
Water Spinach ◽  
Photochemical Process ◽  
Ipomoea Aquatica ◽  
Use Efficiency

Aims: To characterize the growth, carbon assimilation and quality of Ipomoea aquatica as influenced by magnetic nanoparticles (MNP) application as well as to determine the best rates of iron oxide nanoparticles that give high growth, carbon assimilation and quality of Ipomoea aquatica. Study Design: Ipomoea aquatica plants were exposed to four different treatments of magnetic iron oxide nanoparticles (Fe3O4) (0, 50, 100 and 150 mg L-1). The experiment was conducted in a randomized complete block design (RCBD) with 3 replications. One unit of experiment consisted of 8 plants and there were 96 plants used in the experiment. Place and Duration of Study: Department of Biology, Faculty of Science, Universiti Putra Malaysia, between March 2018 and July 2018. Methodology: The growth parameters measured included: plant height, basal diameter, total leaf number, leaf temperature, total chlorophyll content and plant biomass. The carbon assimilation parameters were measured using IRGA (Infrared Gas Analyzer, LICOR 6400 XT Portable Photosynthesis System). i.e. transpiration rate (E), stomatal conductance and water use efficiency (WUE). The chlorophyll fluorescence were measured by using Pocket PEA that measured maximum efficiency of photosystem ii, (fv/fm), maximum quantum yield of phytochemical and non-photochemical process in photosystem II (fv/fo), minimal fluorescence (fo), performance index (PI) and Density of Reaction Centers Per PSII Antenna Chlorophyll (RC/ABS). Total phenolics and flavonoids contents in leaves were measured using Folin-Ciocalteu method. Results: It was observed that plant height, shoot length, plant temperature, total biomass, and total chlorophyll content were significantly influenced (p≤0.05) by the different concentrations of magnetic nanoparticles. The net photosynthetic rate (A), transpiration rate (E), stomatal conductance (gs), maximum efficiency of photosystem II (Fv/fm), maximum quantum yield of phytochemical and non-photochemical process in photosystem II (Fv/fo), performance index and the density of reaction centers per PSII antenna chlorophyll of Ipomoea aquatica were significantly reduced at higher concentration of magnetic nanoparticles. However, water use efficiency and minimal fluorescence value (Fo) of Ipomoea aquatica increased with increase of MNP concentration. In addition, the application of magnetic nanoparticles significantly influenced (P≤0.05) the total flavonoids and total phenolics content in water spinach. Both of these parameters were increased when higher concentration of magnetic nanoparticles was applied to Ipomoea aquatica. This study showed that MNP affected the growth, carbon assimilation and secondary metabolites production of Ipomoea aquatica. Conclusion: In conclusion, the higher concentration of magnetic nanoparticles reduced the growth rate and carbon assimilation of water spinach and enhanced the production of secondary metabolites.

A nitrogen dynamic hydroponic culture on performance and quality of water spinach (Ipomoea aquatica)

2020 ◽  
Vol 43 (6) ◽  
pp. 773-783
Author(s):  
Shuyu Xiang ◽  
Songheng Wu ◽  
Qi Zhang ◽  
Yuhuan Liu ◽  
Roger Ruan
Keyword(s):  
Hydroponic Culture ◽  
Water Spinach ◽  
Ipomoea Aquatica ◽  
Quality Of Water ◽  
Nitrogen Dynamic

scholarly journals Shading minimizes the effects of water deficit in Campomanesia xanthocarpa (Mart.) O. Berg seedlings

2023 ◽  
Vol 83 ◽  
Author(s):  
E. M. M. Bartieres ◽  
D. M. Dresch ◽  
L. C. Reis ◽  
Z. V. Pereira ◽  
R. M. Mussury ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Water Deficit ◽  
Maximum Efficiency ◽  
Control Group ◽  
Water Retention Capacity ◽  
Water Restriction ◽  
Sod Activity ◽  
Retention Capacity ◽  
Photochemical Process ◽  
Intermittent Irrigation

Abstract The objective of this study was to evaluate the activity of antioxidant enzymes, the functioning of the photosystem II and quality of C. xanthocarpa seedlings cultivated under intermittent water deficit and shading levels and the influence of shading on recovery potential after suspension of the stress conditions. The seedlings were subjected to three levels of shading (0, 30, and 70%), six periods of evaluation (start: 0 days; 1st and 2nd photosynthesis zero: 1st and 2nd P0; 1st and 2nd recovery: 1stand 2nd REC; and END), and two forms of irrigation (control: periodically irrigated to maintain 70% substrate water retention capacity, and intermittent irrigation: suspension of irrigation). The plants subjected to intermittent irrigation conditions at 0% shading showed a reduction in water potential (Ψw) and potential quantum efficiency of photosystem II (Fv/Fm) and maximum efficiency of the photochemical process (Fv/F0) and an increase in basal quantum production of the non-photochemical processes (F0/Fm). Superoxide dismutase (SOD) activity was higher in the leaves than in the roots. The C. xanthocarpa is a species sensitive to water deficit but presents strategies to adapt to an environment under temporary water restriction, which are more temporary are most efficient under shading. The seedlings with water deficit at all levels of shading exhibited higher protective antioxidant activity and lower quality at 0% shading. The shading minimizes prevents permanent damage to the photosystem II and after the re-irrigation, the evaluated characteristics showed recovery with respect to the control group, except POD and SOD activities in the leaves.

scholarly journals The use of water spinach plants (Ipomoea aquatica Forsk.) for phytoremediation of hospital waste

2021 ◽  
Vol 2126 (1) ◽  
pp. 012026
Author(s):  
Suherman ◽  
S Rahmawati ◽  
I Said ◽  
Nurbaya ◽  
S Armiyanti ◽  
...  
Keyword(s):  
Household Waste ◽  
Hospital Wastewater ◽  
Water Spinach ◽  
Ipomoea Aquatica ◽  
Treatment Processes ◽  
Randomized Design ◽  
Physical And Chemical Quality ◽  
Physical And Chemical ◽  
Test Level

Abstract Water spinach (Ipomoea aquatica Forsk.) has the ability to accumulate pollutants so that it can be useful for wastewater treatment processes. The purpose of this study was to determine the phytoremediation technique in hospital wastewater using kale in improving the quality of hospital wastewater and to determine the level of accumulation of Pb and Cr metals in plants. The study used a completely randomized design with four treatments, namely treatment 0 days (without treatment), 2 days, 4 days and 6 days. Parameters include the physical and chemical quality of the waste as well as the content of Pb and Cr in the waste and plants. To determine the effect of phytoremediation on the quality of household waste and metal content, ANOVA analysis and further testing with the BNT test level of 5% were used. Phytoremediation with kale was able to reduce the temperature of the waste on the 4th day of treatment and dissolved oxygen on the 4th treatment and increase the pH. The accumulation of Pb and Cr on each day is different. The highest accumulation of Pb and Cr occurred on day 6, namely 0.1587 mg/L for Pb metal and 0.2167 mg/L for Cr metal. Kale plants are very possible to be used in the phytoremediation process.

Comparative assessment of bioactive compounds, antioxidant capacity and nutritional quality of red seaweeds and water spinach

2021 ◽  
pp. 101878
Author(s):  
Md. Solaiman Hossain ◽  
Saad Al-din Sifat ◽  
M. Afzal Hossain ◽  
Sazlina Salleh ◽  
Mofazzal Hossain ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Bioactive Compounds ◽  
Nutritional Quality ◽  
Comparative Assessment ◽  
Water Spinach ◽  
Red Seaweeds

Water use efficiency and fruit quality of table grape under alternate partial root-zone drip irrigation

2008 ◽  
Vol 95 (6) ◽  
pp. 659-668 ◽  
Author(s):  
Taisheng Du ◽  
Shaozhong Kang ◽  
Jianhua Zhang ◽  
Fusheng Li ◽  
Boyuan Yan
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Fruit Quality ◽  
Drip Irrigation ◽  
Root Zone ◽  
Table Grape ◽  
Use Efficiency

scholarly journals Introducing a frequency-tunable magnetic particle spectrometer

2015 ◽  
Vol 1 (1) ◽  
pp. 249-253 ◽  
Author(s):  
André Behrends ◽  
Matthias Graeser ◽  
Thorsten M. Buzug
Keyword(s):  
Magnetic Nanoparticles ◽  
Image Quality ◽  
Magnetic Particle ◽  
Imaging Modality ◽  
Magnetic Particle Imaging ◽  
Common Technique ◽  
Frequency Tunable ◽  
Excitation Frequencies ◽  
Particle Imaging

AbstractImage quality in the new imaging modality magnetic particle imaging (MPI) heavily relies on the quality of the magnetic nanoparticles in use. Therefore, it is crucial to understand the behaviour of such particles. A common technique to analyze the behaviour of the particles is magnetic particle spectrometry (MPS). However, most spectrometers are limited to measurements at a single or multiple discrete excitation frequencies. This paper introduces a frequency-tunable spectrometer, able to perform measurements in the range of 100 Hz - 24kHz.

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