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Asian Mokara (Orchidaceae) hybrids used as cut flowers: Comparison of cultivars. Part 1

100%
Piechocki R., Salachna P., Żurawik P., Adamski A., Dymek R.
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vol. 26
1-10
EN
The Orchidacea are one of the largest families of flowering ornamental plants in the Pacific region, especially in the tropics. Among this group plants, attention should be paid to the intergeneric hybrid Mokara. The following 10 cultivars of the Mokara hybrid were used in the experiment: ‘Bloonlong’, ‘Calipso’, Chak Kuan’, ‘Chorcharood’, ‘Jenistar’, ‘Kitti’, ‘Pranee’, ‘Robin’, ‘Tammy’ and ‘Tangerine’. The tested Mokara cultivars are distinguished by a wide palette of warm colors, including many shades of orange and red. These are very rare colors among other popular genera of orchids.
2
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Genetic variability, heritability and genetic advance for yield and yield components in watermelon (Citrullus lanatus Thunb.)

100%
Anburani A., Kannan P., Muthumanickam K.
World News of Natural Sciences
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2019
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vol. 25
22-30
EN
Field investigation was carried out to study the genetic variability, heritability and genetic advance and the variability studies showed significant differences among the thirty genotypes for all the thirteen characters. Yield per plant was maximum in CL 4 genotype collected from Atchirupakkam in Villupuram district. The characters viz., number of vines per plant, sex ratio, days to first female flowers, node number of first female flower, days to fruit maturity and number of fruits per plant were recorded the maximum in the same genotype. Genetic analysis indicated maximum phenotypic and genotypic coefficient of variation for single fruit weight and 100 seed weight. The characters viz., fruits diameter, flesh thickness, number of fruits per plant and yield per plant, recorded highest estimate of PCV and moderate estimation of GCV. The characters viz., number of seeds per fruits, flesh thickness, number of primary branches and fruit diameter recorded moderate estimate of PCV and GCV. Lower estimation of GCV was observed for sex ratio, fruit length and number of male and female flowers. High heritability (broad sense) was observed for 100 seed weight, number of seeds per fruit, single fruit weight, vine length, fruit diameter, fruit length, flesh thickness, number of male flowers,sex ratio, yield per plant, number of primary branches per plant, number of female flowers and number of fruits per plant. Based on mean performance, CL 4 followed by CL 22 and CL 10 were selected as the best genotypes in watermelon for the costal ecosystem, by virtue of their higher yield combined with desirable component characters.
3
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Asian Mokara (Orchidaceae) hybrids used as cut flowers: Postharvest evaluation. Part 2

100%
Dymek R., Adamski A., Salachna P., Piechocki R., Żurawik P.
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vol. 26
11-19
EN
Mokara is one of the widely cultivated orchid in the Pacific region, especially in the tropics. In this study we evaluated the longevity of inflorescences and flowers 10 Mokara cultivars: ‘Bloonlong’, ‘Calipso’, Chak Kuan’, ‘Chorcharood’, ‘Jenistar’, ‘Kitti’, ‘Pranee’, ‘Robin’, ‘Tammy’ and ‘Tangerine’. Cultivar ‘Kitti’ inflorescences were characterized by excellent vase life for more than three weeks. The highest longevity had the flowers of ‘Bloonlong’, ’Kitti’ and ‘Robin’. Spraying flowers of Mokara orchids with the OASIS® Clear Life preparation increased their quality depending on the cultivar.
4
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List of ornamental and useful plants cultivated on Huahine Island, French Polynesia. Part 2

100%
Borowski T.
World News of Natural Sciences
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2020
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vol. 30
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issue 2
257-270
EN
In the traditional culture of the Polynesians, the unity of nature and the human being regarded as its part was something obvious. A significant part of the flora and fauna of the Polynesian island of Huahine had a quasi-religious character, playing the role of a taboo, objects of culture, landmarks, and not infrequently even being used as medicine. The colonisation of Polynesia by European nations led to profound changes, also in the way the relation between a human being and nature was perceived, making the character of the latter more utilitarian. Elements of the Polynesian flora became a sought-after raw material in the woodworking industry, the furniture industry, and the cosmetics and perfume industry. The paper discusses selected elements of the flora of the Polynesian islands and the changes in the way they have been perceived and used.
5
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Different approach to determination of pyrethroid pesticides in ornamental plants

100%
Zięba K., Miśkowiec P.
World News of Natural Sciences
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2019
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vol. 27
96-107
EN
The aim of the presented research was to develop and optimize a methodology, particularly dedicated for the quantification of pyrethroids in ornamental plant material on the basis of a rose (Rosa hybrid) with the use of HPLC chromatography and QuEChERS extraction method. High repeatability and reproducibility of the results were obtained by using acetonitrile as an eluent. The determined limits of detection and quantification for deltamethrin equal 5.2 ng and 9.3 ng per 1 cm3 of analysed solution respectively. For cypermethrin these values were: LOD 1.2 ng, LOQ 5.0 ng per 1 cm3 of solution. It has been shown that solutions of deltamethrin and cypermethrin are of high stability – they can be stored at room temperature for as long as 28 days without a change in the concentration. The experiments presented showed that the QuEChERS extraction of deltamethrin from the tested samples can be performed with efficiency above 93% using acetonitrile as a solvent, magnesium sulphate and sodium acetate as the separation salts. For purification Supel ™ QUE sorbent by Supelco was successfully applied. The described analytical method may be a valuable and relatively cheap tool to control the amounts of these pesticides sprayed in environment, wherever there is a suspicion of their excessive use.
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