scholarly journals Quantification of plant chlorophyll content using Google Glass

Lab on a Chip ◽  
2015 ◽  
Vol 15 (7) ◽  
pp. 1708-1716 ◽  
Author(s):  
Bingen Cortazar ◽  
Hatice Ceylan Koydemir ◽  
Derek Tseng ◽  
Steve Feng ◽  
Aydogan Ozcan
Keyword(s):  
Chlorophyll Content ◽  
Chlorophyll Concentration ◽  
Cost Effective ◽  
Plant Leaves ◽  
Google Glass ◽  
Software Application

We demonstrate accurate measurement of chlorophyll concentration in plant leaves using Google Glass and a custom-developed software application together with a cost-effective multi-spectral leaf illuminator unit.

scholarly journals Peculiarities of pigment complex functioning of winter wheat plants depending on the fertilizer application method

2021 ◽  
Vol 12 (3) ◽  
pp. 7-16
Author(s):  
Z. Bilousova ◽  
◽  
V. Keneva ◽  
Y. Klipakova ◽  
◽  
...  
Keyword(s):  
Winter Wheat ◽  
Magnesium Sulfate ◽  
Chlorophyll Content ◽  
Photosynthetic Apparatus ◽  
Fertilizer Application ◽  
Pigment Content ◽  
Plant Leaves ◽  
Significant Difference ◽  
Foliar Treatment ◽  
Pigment Complex

To obtain the maximum yield of winter wheat, it is necessary to further optimize the existing cultivation technologies in the direction of their adaptation to changing environmental conditions. One of the areas of adaptation of plants to adverse abiotic factors is the active functioning of the photosynthetic apparatus, which depends on the amount of nutrients introduced. The influence of fertilizer application on the condition of the pigment complex of winter wheat plants in the conditions of the Southern Steppe of Ukraine has been studied. Two varieties of winter wheat were selected for the study: Shestopalivka and Mason. The experiment scheme involved the application of fertilizers at sowing (K0; K12) and foliar treatment with various tank mixtures (urea; urea + magnesium sulfate; urea + magnesium sulfate + potassium monophosphate). The pigment content has been determined by grinding fresh leaves of winter wheat, followed by the addition of a solvent in the form of acetone. Measurements of pigments were performed using a spectrophotometer. According to the research results, it was established that before the foliar treatment the a-chlorophyll content and carotenoids was higher in the plant leaves of the Shestopalivka variety. At the same time, the b-chlorophyll content on the contrary was higher for plants of the Mason variety by 17%, which may be due to the adaptation of plants of this variety to lack of light. On the 3rd day after foliar treatment, a decrease in the pigment content in the plant leaves of all experimental variants has been observed, which was due to the active growth of the photosynthetic surface and a decrease in the total dry matter mass. There was no significant difference between the varieties of the content of photosynthetic pigments in this period. On the 10th day after foliar treatment, an increase in a- and b-chlorophyll content has been observed for both studied varieties, which may be the result of adaptation of the photosynthetic apparatus of winter wheat plants to lighting conditions. Foliar treatment of winter wheat plants with a tank mixture of urea with magnesium sulfate and potassium monophosphate contributed to a further increase in the content of a-chlorophyll by 12-23%, and b-chlorophyll by 5-37% depending on the variety compared to the control. The results of the research testify to the high efficiency of complex application of nitrogen-phosphorus-potassium fertilizers for foliar treatment of winter wheat plants in the BBCH 31 stage, both against the background of pre-sowing application of potassium fertilizers and without it.

scholarly journals The Influence of Iron Chelates on Chlorophyll Content and Yield of Bajra Napier

2021 ◽  
pp. 1-6
Author(s):  
S. S. Sangeetha ◽  
D. Jawahar ◽  
T. Chitdeshwari ◽  
C. Babu ◽  
L. Lakshmanan
Keyword(s):  
Chlorophyll Content ◽  
Iron Uptake ◽  
Ferrous Sulphate ◽  
Chlorophyll Concentration ◽  
Forage Crop ◽  
Fodder Yield ◽  
Four Levels ◽  
The Impact ◽  
Different Soils

Bajra Napier is an important forage crop. Numerous studies have reported a direct relationship between ferrite levels and physiological function of plants. The present study investigates the impact of iron sources and its levels on yield and chlorophyll content of Bajra Napier. The experiment was carried out in a Factorial CRD with 3 factors namely seven sources of Iron (Fe glycinate, Fe citrate, Fe tartrate, Fe glutamate, FeSO4, Fe-EDDHA, Fe malate) four levels (FeSO4 - 0, 25, 37.5 and 50 kg ha -1 and Fe chelates - 0, 1, 2.5 and 5 kg ha -1) and two different soils (Calcareous and Non-calcareous).The results revealed that the iron application increased the chlorophyll concentration and yield, and it was also seen that as the level increased there was an increase in both the characteristics. These results indicated that applying Fe chelates have significantly improved the quality of produce and it was seen that there was an improvement in the iron uptake and the fodder yield showed a greater increase when compared to ferrous sulphate.

scholarly journals Nutrients Assimilation and Chlorophyll Contents for Different Grapevine Varieties in Calcareous Soils in the Somontano DO (Spain)

Beverages ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 90 ◽  
Author(s):  
José Casanova-Gascón ◽  
Pablo Martín-Ramos ◽  
Clara Martí-Dalmau ◽  
David Badía-Villas
Keyword(s):  
Chlorophyll Content ◽  
Fruit Set ◽  
Chlorophyll Concentration ◽  
Calcareous Soils ◽  
Pinot Noir ◽  
Growth And Yield ◽  
Cabernet Sauvignon ◽  
Chlorophyll Contents ◽  
Young Leaves ◽  
The Impact

Lime-induced chlorosis (LIC) is an important abiotic constraint affecting the growth and yield of grapevines growing in calcareous soils in the Mediterranean region, and the sensory properties of the produced wine. In the work presented herein, the impact of LIC on the nutritional status and chlorophyll content was assessed for eleven varieties and a clone (Merlot, Pinot Noir, Cabernet Sauvignon, Tempranillo, Parraleta, Moristel, Aglianico, Macabeo, Sauvignon, Chardonnay, and Riesling), grafted to the same rootstock (1103 Paulsen). Macro- and micronutrient contents were determined in the fruit set and veraison stages by petiole analyses, while chlorophyll content in young leaves was monitored by SPAD. Significant differences were detected amongst varieties for all nutrients (including Fe), and inverse relationships between Fe and P contents in the petiole and chlorophyll concentration in the young leaves were found. Regarding LIC resistance, the Fe and chlorophyll contents suggest that Cabernet Sauvignon, Tempranillo and Aglianico varieties would show the best performance, while Sauvignon would be the least tolerant.

Effect of Certain Quinones, Diquat, and Diuron on Chlorella pyrenoidosa Chick. (Emerson strain)

Weed Science ◽  
1968 ◽  
Vol 16 (1) ◽  
pp. 69-73 ◽  
Author(s):  
G. Zweig ◽  
J. E. Hitt ◽  
R. McMahon
Keyword(s):  
Chlorophyll Content ◽  
Oxygen Evolution ◽  
Physiological Activity ◽  
Chlorophyll Concentration ◽  
Chlorella Pyrenoidosa ◽  
Inhibitory Effect ◽  
Cell Number ◽  
Drastic Decrease ◽  
Oxygen Evolving

The effect of 1,4-naphthoquinone, 1,4-benzoquinone, and several CI and NH2-substituted quinones has been studied on growth, chlorophyll concentration, and oxygen evolution in Chlorella pyrenoidosa Chick. (Emerson strain). Drastic decrease of the studied parameters usually was noted after 24 to 48 hr treatment at 3×10–5 M concentration. The effect of the quinones was compared with that of 6,7-dihydrodipyrido [l,2-a:2,l-c-]pyrazidinium salt (diquat) and 3-(3,4-dichlorophenyl)-l,l-dimethylurea (diuron). Diuron inhibited oxygen evolution immediately after addition, but could be washed out and the effect was reversible. Diquat had no inhibitory effect on oxygen evolution and chlorophyll content but caused a slight decrease in cell number. Although some quinones have an almost immediate effect on the oxygen-evolving mechanism, it seems more likely that the overall effect of the quinones is on the total physiological activity of the algal cells. Oxygen evolution seems to affected earlier than chlorophyll destruction, and the observed long-term damage is irreversible. Most of the compounds studied could be classified as algicidal, with the exception of diuron, diquat, and 1,4-benzoquinone which may be considered to be algistatic.

Using PROSEPCT and SVM for the Estimation of Chlorophyll Concentration

2014 ◽  
Vol 989-994 ◽  
pp. 2184-2187
Author(s):  
Jie Lv ◽  
Feng Li Deng ◽  
Zhen Guo Yan
Keyword(s):  
Chlorophyll Content ◽  
Large Scale ◽  
Chlorophyll Concentration ◽  
Support Vector ◽  
Maximum Correlation ◽  
Dynamic Prediction ◽  
West Lake ◽  
Chlorophyll Contents ◽  
Irrigated Area ◽  
Vector Machines

This study focused on estimating chlorophyll concentration of rice using PROSPECT and support vector machine. The study site is located in West Lake sewage irrigation area of Changchun, Jiliin Province. Reflectance spectrual of rice were measured by ASD3 spectrometer, chlorophyll contents of rice were recorded with a portable chlorophyll meter SPAD-502. Support vector machines and PROSPECT model were adopted to construct hyperspectral models for predicting chlorophyll content. The results indicate that: the hyperspectral prediction model of rice chlorophyll content yields a maximum correlation coefficient of 0.8563, and achieves a smallest RMSE of 9.5106; and the prediction accuracy based on the first derivative spectrum is higher than on the original spectrum. Research of this paper provides a theoretical basis for large scale dynamic prediction of rice chlorophyll content in sewage irrigated area.

Self-Propelled Corn Harvester Virtual Design

2015 ◽  
Vol 727-728 ◽  
pp. 505-508
Author(s):  
Zhe Ming
Keyword(s):  
Modeling And Simulation ◽  
Cost Effective ◽  
Virtual Prototype ◽  
Structure Design ◽  
Virtual Design ◽  
Design Efficiency ◽  
Software Application ◽  
Maize Straw ◽  
Modeling Software

Aiming at the need to retain the current maize straw harvester in China: Problems and ordinary farmers harvest corn after the completion of the overall structure, design of self-propelled corn harvester; 3D parameter modeling software application for modeling and Simulation of harvester ear picking roller, complete harvester virtual prototype assembly, improves the design efficiency of the harvester; the whole structure compact, cost-effective, reliable work.

VARIATIONS IN PHOTOSYNTHESIS, CHLOROPHYLL CONTENT, AND RIBULOSE-l,5-DIPHOSPHATE CARBOXYLASE ACTIVITY WITHIN TOBACCO LEAVES

1974 ◽  
Vol 54 (2) ◽  
pp. 409-412 ◽  
Author(s):  
E. N. ASHWORTH ◽  
L. V. SVEC
Keyword(s):  
Chlorophyll Content ◽  
Photosynthetic Rate ◽  
Chlorophyll Concentration ◽  
Single Plant ◽  
Fresh Weight ◽  
Leaf Base ◽  
Carboxylase Activity ◽  
Single Leaf ◽  
Area Basis ◽  
White Burley

Photosynthetic rate on an area basis did not differ when tobacco (Nicotinana tabacum L., ’White Burley’) leaf discs were sampled from margin and base tissue but was greater at the leaf base when expressed per unit chlorophyll or fresh weight. Chlorophyll concentration, ribulose-1,5-diphosphate carboxylase activity, and fresh and dry weights were significantly higher in discs from the margin. If location on the leaf and method of expressing data are not standardized when making comparisons of photosynthesis on a microbasis either within a single leaf, a single plant or among plants, invalid comparisons and conclusions could result.

scholarly journals Chlorophyll as an indicator of green tea quality

2014 ◽  
Vol 83 (10) ◽  
pp. S103-S109 ◽  
Author(s):  
Martina Ošťádalová ◽  
Bohuslava Tremlová ◽  
Jana Pokorná ◽  
Martin Král
Keyword(s):  
Chlorophyll Content ◽  
Green Tea ◽  
Storage Time ◽  
Chlorophyll Concentration ◽  
Storage Period ◽  
Storage Conditions ◽  
Qualitative Variable ◽  
Chlorophyll Contents ◽  
Tea Quality ◽  
The Relationship

The objective of this work was to study the changes in chlorophyll contents in green teas stored under different conditions and to suggest the most suitable way and length of green tea storage. A secondary aim was to evaluate the possibility of using the chlorophyll content as an indicator of tea freshness. Samples for analysis were obtained from a range of tea-growing regions. Chlorophyll contents were measured using UV-vis spectrophotometry. Chlorophyll absorbance was measured at 642.5 and 660 nm. Prior to storage, chlorophyll concentration in teas ranged from 1.12 to 1.89 mg per 1 g of tea, which corresponded to data given by other authors. Storage was found to lead to a decline in chlorophyll concentration. From the 6th month of storage onwards, a significant decrease (P < 0.05) was observed in all samples, irrespective of storage conditions. Based on the findings of this study, original and metal packaging can be considered the most chlorophyll-friendly. On the other hand, glass and paper packaging stored in direct daylight were found to have the strongest impact on chlorophyll concentration. Overall, it can be concluded that the storage time can have a strong influence on oolong green tea colour as an important qualitative variable. Thus, the shelf-life of tea should be shorter than the 12 months claimed by most manufacturers. Once the relationship between changes in chlorophyll concentration and length of the storage period had been established, the chlorophyll content was suggested as an indicator of the storage time (freshness) of a tea substance.

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