scholarly journals DETERMINATION OF CHLOROPHYLL CONTENT OF SOME MANGROVES AND ASSOCIATED PLANT SPECIES OF PAYANGADI, KANNUR

2018 ◽  
Vol 5 (1) ◽  
pp. 33-35
Author(s):  
Gayathri P.V ◽  
Lalitha C.R
Keyword(s):  
Chlorophyll Content ◽  
Plant Species ◽  
Age Groups ◽  
Mangrove Species ◽  
Intertidal Zones ◽  
Chlorophyll Contents ◽  
Associated Species

Mangroves are trees inhabiting the intertidal zones of tropical and subtropical coast. They are classified as true mangroves and mangrove associates. In the present study leaf samples of various age groups from five mangrove species and six mangrove associated species were selected for the estimation of chlorophyll content. True mangroves showed comparatively high amount of chlorophyll than mangrove associates and moreover in medium aged leaves chlorophyll contents were more than young and old leaves.

scholarly journals Principal Component Analysis of Chlorophyll Content in Tobacco, Bean and Petunia Plants Exposed to Different Tropospheric Ozone Concentrations

2014 ◽  
Vol 12 (1) ◽  
pp. 5-16 ◽  
Author(s):  
Klaudia Borowiak ◽  
Janina Zbierska ◽  
Anna Budka ◽  
Dariusz Kayzer
Keyword(s):  
Principal Component Analysis ◽  
Chlorophyll Content ◽  
Plant Species ◽  
Ozone Concentration ◽  
Tropospheric Ozone ◽  
Principal Component ◽  
Ambient Air ◽  
Component Analysis ◽  
Chlorophyll Contents ◽  
Ozone Concentrations

Abstract Three plant species were assessed in this study - ozone-sensitive and -resistant tobacco, ozone-sensitive petunia and bean. Plants were exposed to ambient air conditions for several weeks in two sites differing in tropospheric ozone concentrations in the growing season of 2009. Every week chlorophyll contents were analysed. Cumulative ozone effects on the chlorophyll content in relation to other meteorological parameters were evaluated using principal component analysis, while the relation between certain days of measurements of the plants were analysed using multivariate analysis of variance. Results revealed variability between plant species response. However, some similarities were noted. Positive relations of all chlorophyll forms to cumulative ozone concentration (AOT 40) were found for all the plant species that were examined. The chlorophyll b/a ratio revealed an opposite position to ozone concentration only in the ozone-resistant tobacco cultivar. In all the plant species the highest average chlorophyll content was noted after the 7th day of the experiment. Afterwards, the plants usually revealed various responses. Ozone-sensitive tobacco revealed decrease of chlorophyll content, and after few weeks of decline again an increase was observed. Probably, due to the accommodation for the stress factor. While during first three weeks relatively high levels of chlorophyll contents were noted in ozone-resistant tobacco. Petunia revealed a slow decrease of chlorophyll content and the lowest values at the end of the experiment. A comparison between the plant species revealed the highest level of chlorophyll contents in ozone-resistant tobacco.

scholarly journals Chlorophyll Determination in Green Pepper Using two Different Extraction Methods

2015 ◽  
Vol 4 (1) ◽  
pp. 52-60 ◽  
Author(s):  
E Manolopoulou ◽  
Th Varzakas ◽  
A Petsalaki
Keyword(s):  
Chlorophyll Content ◽  
Storage Time ◽  
Storage Temperature ◽  
Extraction Methods ◽  
Green Pepper ◽  
Factors Affecting ◽  
Chlorophyll Contents ◽  
Chlorophyll Extraction ◽  
And Storage

The aim of this paper is the comparison of the classic Arnon method with the DMSO method regarding the determination of chlorophyll content in California Wonder peppers stored for 25 days at 5, 10 and 20°C. The results suggest that the factors affecting chlorophyll degradation are temperature and storage time, as well as their interaction. There is a linear relationship between changes in chlorophyll content and storage temperature. The statistical analysis indicates that the two chlorophyll extraction methods considerably differ, as the chlorophyll contents obtained through the Arnon method were, in all cases, lower than those obtained through DMSO. It has to be stressed that the results greatly depend on both the selected solvent and the chlorophyll extraction method.

scholarly journals On the flora of honey plants of the Northern and Northwestern Altai regions within the Altai Territory

2019 ◽  
Vol 16 ◽  
pp. 00013
Author(s):  
Tatyana Kopytina ◽  
Galina Nenasheva ◽  
Marya Ivanova
Keyword(s):  
Plant Species ◽  
Botanical Composition ◽  
Floristic Richness ◽  
Maximum Content ◽  
North Western

The revision of honey plants in the regions’ floras and nature objects is regularly made for estimation of melliferous capacity of the territory. The article is devoted to the investigation of the melliferous flora of Northern and North-Western Altai in the area of Altai Territory. The goal of the research was to reveal the botanical composition of authentic honeys. The representativeness of melliferous species among common floristic richness in the studied districts is the following: in Altaiskiy − 56.49 %, Smolenskiy − 60.17 %, Soloneshenskiy − 53.61 %, Charyshskiy − 44.57 %. The examples of the botanical content of samples typical for each of these districts have been shown. In the angelica (djagilevyj) honey from Altajskiy district the maximum content of pollen belongs to the representatives from Apiaceae family 78.86 %. For the angelica (djagilevyj) honeys from surveyed districts the high content of pollen from the families Asteracerae, Brassicaceae, Fabaceae, Rosaceae are typical with different percentage in the samples. The article provides information on examples of wild-growing plant species including relicts, potential melliferous which pollen can be used as “marker” for determination of honey as Altai-origin.

Morphologic variations of periwinkle and profiles of periwinkle marketers and harvesters in two states in the Niger delta area of Nigeria

2015 ◽  
Vol 11 (2) ◽  
pp. 140-147
Author(s):  
M Okpeku ◽  
MB Nodu ◽  
A Essien ◽  
CT Fekorigha
Keyword(s):  
Shell Length ◽  
Niger Delta ◽  
Age Groups ◽  
Work Force ◽  
Omega 3 ◽  
Intertidal Zones ◽  
Phenotypic Differences ◽  
Aged People ◽  
Market Women ◽  
Rivers State

Periwinkles are invertebrates rich in protein and omega-3 fatty acids. These make them relished delicacies. Three hundred and fifteen (315) individual periwinkles were hand-picked from mangrove swamp river banks and intertidal zones of Twon-Brass in Bayelsa State and Abonnema town of Rivers State. Shell length and the weight of both the meat and shell were taken with Veneer caliper and a sensitive electronic scale balance respectively. Information on the economics of production was gathered from market women and harvesters through the use of structured questionnaires. The present study indentified possible phenotypic differences among periwinkle harvested in Bayelsa and Rivers States base on shell length and meat weight differences. Periwinkle harvested in Rivers is bigger and heavier than those harvested in Bayelsa State. Prediction of meat and total weight of from shell length was done using regression analysis. The study also identified the involvement of the different age groups that form the work-force in the States; showing that there are more young adults and teenagers in the business of harvesting and sales than aged people. There are more men involved in the business than women. There is a decline in size, quantity and availability of periwinkle presently than in the past, a factor that could be attributed to over-harvesting.Key Words: Bayelsa, Morphology, Niger Delta, Periwinkle, Rivers.

scholarly journals Relative chlorophyll contents in the evaluation of the nutritional status of nitrogen from xaraes palisade grass and determination of critical nitrogen sufficiency index

2015 ◽  
Vol 37 (2) ◽  
pp. 109
Author(s):  
Joao Paulo Ramos Costa ◽  
Gregory de Paula Caputti ◽  
Leandro Galzerano ◽  
Wilton Ladeira da Silva ◽  
Ana Cláudia Ruggieri ◽  
...  
Keyword(s):  
Nutritional Status ◽  
Chlorophyll Contents

scholarly journals Effects of 1-MCP on External Postharvest Qualities and Shelf Life of ‘Maha Chanok’ Mango Fruit

2015 ◽  
Vol 8 (1) ◽  
pp. 68
Author(s):  
B. Chutichudet ◽  
Prasit Chutichudet ◽  
Usana Trainoak
Keyword(s):  
Chlorophyll Content ◽  
Fruit Weight ◽  
Storage Life ◽  
Fruit Firmness ◽  
Mango Fruit ◽  
Chlorophyll Contents ◽  
Randomized Design ◽  
Fruit Decay ◽  
Completely Randomized Design ◽  
And Storage

<p>‘Maha Chanok’<strong> </strong>mango is an economic fruit crop widely cultivated commercially throughout Thailand. By nature, mango fruit has a rather limited storage life after harvest. 1-methylcyclopropene (1-MCP) has been accepted as a commercial substance to improve several fruit qualities. The objective of this research was to study the effects of 1-MCP on the external postharvest qualities and storage life on the ‘Maha Chanok’ mango fruit. The experiment was laid out in a Completely Randomized Design with three replicates, ten fruits per replicate. Mango fruit was fumigated with 1-MCP at three concentrations (1000, 1250, or 1500 nl l<sup>-1</sup>) and three fumigation periods (12, 18, or 24 h), compared with the control fruit. After treating, all treatments were stored under ambient temperature (27 °C, 80%R.H.). The following determinations were made every two days for assessment of fruit weight loss, firmness, chlorophyll content, decay incidence, and storage life. The results showed that fruit treated with 1500 nl l<sup>-1</sup><strong> </strong>1-MCP for 24 h had the maximal fruit firmness. For chlorophyll content, the results showed that fruit-treated with 1500 nl l<sup>-1</sup><strong> </strong>1-MCP for 12 h could effectively retain the highest chlorophyll contents. Furthermore, both the lowest fruit decay and the longest storage life of 12 days were achieved from the fruit treated with 1000 nl l<sup>-1</sup><strong> </strong>1-MCP for 12 h.</p>

Rubidium and Strontium age determination of some Pre-Cambrian granitic rocks, S.E. Uganda

1971 ◽  
Vol 108 (5) ◽  
pp. 353-360 ◽  
Author(s):  
R. A. Old ◽  
D. C. Rex
Keyword(s):  
Age Groups ◽  
Age Determination ◽  
Granitic Rocks ◽  
Age Limit ◽  
Age Determinations

SummaryWhole rock rubidium-strontium age determinations on granitic bodies in S.E. Uganda give ages of 2930 m.y. for the Masaba Granite and 2430 m.y. for the Buteba Granite and granitic gneisses. The former age is considered to represent the upper age limit of the post-Nyanzian orogeny, and 2430 m.y. the upper age limit of the post-Kavirondian orogeny. A second isochron age of 2100 m.y. for the Masaba Granite may reflect a second intrusion, or remobilization of part of the original granite associated with the Buganda–Toro orogeny. Tentative correlations are suggested between these age groups and others within the Tanzanian Shield and beyond.

scholarly journals Efficiency of portable chlorophyll meters in assessing the nutritional status of wheat plants

2015 ◽  
Vol 19 (12) ◽  
pp. 1148-1151 ◽  
Author(s):  
Alessana F. Schlichting ◽  
Edna M. Bonfim-Silva ◽  
Matheus de C. Silva ◽  
William Pietro-Souza ◽  
Tonny J. A. da Silva ◽  
...  
Keyword(s):  
Nutritional Status ◽  
Chlorophyll Content ◽  
Direct Determination ◽  
Probability Level ◽  
Indirect Determination ◽  
N Concentration ◽  
Randomized Design ◽  
Chlorophyll Index ◽  
Completely Randomized Design

ABSTRACT The objective of this study was to verify the efficiency of two portable chlorophyll meters (Minolta SPAD® 502 and Falker ClorofiLOG® 1030) in assessing the nutritional status of wheat plants, correlating the indices from the devices and the direct determination of chlorophyll content with the concentration of nitrogen (N) in the plant. The experiment was conducted in a greenhouse, in pots with 5 dm3 of Oxisol, in a completely randomized design, with six N doses (0, 80, 160, 240, 320 and 400 mg dm-3) and five replicates. At 47 days after emergence, the readings of SPAD and Falker indices and the quantification of chlorophyll content and N concentration in wheat plants were performed, as well as analysis of variance and correlation test, both at 0.05 probability level. The chlorophyll meters Minolta SPAD® 502 and Falker ClorofiLOG® 1030 do not differ with respect to the indirect determination of chlorophyll in wheat plants. The Falker chlorophyll index was statistically equal to the chlorophyll content. Indirect chlorophyll indices and chlorophyll content showed a high correlation with the N concentration in the plant.

scholarly journals Blue Light added with Red LEDs Enhance Growth Characteristics, Pigments Content, and Antioxidant Capacity in Lettuce, Spinach, Kale, Basil, and Sweet Pepper in a Controlled Environment

Plants ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 93 ◽  
Author(s):  
Most Naznin ◽  
Mark Lefsrud ◽  
Valerie Gravel ◽  
Md Azad
Keyword(s):  
Antioxidant Capacity ◽  
Chlorophyll Content ◽  
Plant Height ◽  
Plant Species ◽  
Light Treatment ◽  
Pigment Content ◽  
Growth Chamber ◽  
Carotenoid Content ◽  
Controlled Environment ◽  
Significant Difference

The aim of this study was to investigate the different combinations of red (R) and blue (B) light emitting diode (LEDs’) lighting effects on growth, pigment content, and antioxidant capacity in lettuce, spinach, kale, basil, and pepper in a growth chamber. The growth chamber was equipped with R and B light percentages based on total light intensity: 83% R + 17% B; 91% R + 9% B; 95% R + 5% B; and control was 100% R. The photosynthetic photon flux density (PPFD), photoperiod, temperature, and relative humidity of the growth chamber were maintained at 200 ± 5 μmol m−2 s−1, 16 h, 25/21 ± 2.5 °C, and 65 ± 5%, respectively. It is observed that the plant height of lettuce, kale, and pepper was significantly increased under 100% R light, whereas the plant height of spinach and basil did not show any significant difference. The total leaf number of basil and pepper was significantly increased under the treatment of 95% R + 5% B light, while no significant difference was observed for other plant species in the same treatment. Overall, the fresh and dry mass of the studied plants was increased under 91% R + 9% B and 95% R + 5% B light treatment. The significantly higher flower and fruit numbers of pepper were observed under the 95% R + 5% B treatment. The chlorophyll a, chlorophyll b, and total chlorophyll content of lettuce, spinach, basil, and pepper was significantly increased under the 91% R + 9% B treatment while the chlorophyll content of kale was increased under the 95% R + 5% B light treatment. The total carotenoid content of lettuce and spinach was higher in the 91% R + 9% B treatment whereas the carotenoid content of kale, basil, and pepper was increased under the 83% R + 17% B treatment. The antioxidant capacity of the lettuce, spinach, and kale was increased under the 83% R + 17% B treatment while basil and pepper were increased under the 91% R + 9% B treatment. This result indicates that the addition of B light is essential with R light to enhance growth, pigment content, and antioxidant capacity of the vegetable plant in a controlled environment. Moreover, the percentage of B with R light is plant species dependent.

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