1: Chrysanthemum cinerariifolium A plant species of the genus CHRYSANTHEMUM, family ASTERACEAE. The flowers contain PYRETHRINS, cinerolones, and. Sample records for chrysanthemum cinerariifolium The daisy-like flowers of pyrethrum (Tanacetum cinerariifolium) are used to extract pyrethrins, a botanical . Chrysanthemum cinerariifolium – Pyrethrum. Price: $ Image 1. Larger / More Photos. Sorry but this item is currently unavailable. Please check back at a later.
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Paraphoma crown rot of pyrethrum Tanacetum cinerariifolium. Pyrethrum Tanacetum cinerariifolium is commercially cultivated for the extraction of natural pyrethrin insecticides from the oil glands inside seeds.
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Yield-decline has caused significant yield losses in Tasmania during the last decade. A new pathogen of pyrethrum causing crown rot and reduced. Biosynthesis of Sesquiterpene Lactones in Pyrethrum Tanacetum cinerariifolium. The daisy-like flowers of pyrethrum Tanacetum cinerariifolium are used to extract pyrethrins, a botanical insecticide with a long history of safe and effective use. Pyrethrum flowers also contain other potential defense compounds, particularly sesquiterpene lactones STLswhich represent.
Biosynthesis of sesquiterpene lactones in pyrethrum Tanacetum cinerariifolium. Pyrethrum flowers also contain other potential defense compounds, particularly sesquiterpene lactones STLswhich represent In the present study, we show that germacratrienoic acid is most likely the central precursor for all sesquiterpene lactones present in pyrethrum.
Candidate genes implicated in three committed steps leading from farnesyl diphosphate to STL and other oxygenated derivatives of germacratrienoic acid were retrieved from a pyrethrum Rapid plant regeneration of chrysanthemum Chrysanthemum Dordrecht, The Netherlands, pp. Efficient plant regeneration system has been developed from the nodal segments of chrysanthemum. Nodal segments, after being sterilized with 1. Nutritional disorders in chrysanthemums.
This book is a guide to diagnosing nutritional disorders in chrysanthemums. Deficiencies and toxicities are included, fifteen in all.
Colour plates and descriptions are given for nitrogen, phosphorus, potassium, magnesium, calcium, sulphur, boron, copper, manganese, iron and zinc deficiency and for. Agrobacterium-mediated inoculation of chrysanthemum Chrysanthemum morifolium plants with chrysanthemum stunt viroid. Agroinfiltration was tested as a method of inoculation of chrysanthemum plants with chrysanthemum stunt viroid CSVd.
Binary vectors harboring dimeric CSVd sequences in sense and antisense orientations were constructed, and Agrobacterium transfected with these binary vectors was infiltrated into chrysanthemum leaves. Northern blotting and reverse transcription polymerase chain reaction analysis showed that local infection was established within 7 days and systemic infection within 20 days.
CSVd polarities showed no difference in infectivity. This study showed that agroinfiltration of chrysanthemum plants is an easy, rapid, and cost-effective method for CSVd inoculation.
Effects of light, hydropriming and abiotic stress on seed germination, and shoot and root growth of pyrethrum Tanacetum cinerariifolium. Poor germination and seedling establishment are major problems in arid and semi-arid environments, and these characteristics are considered to be important factors in later plant growth and yield.
Laboratory experiments were conducted on freshly harvested pyrethrum Tanacetum cinerariifolium seeds.
Identification of Chrysanthemum Chrysanthemum morifolium Self-Incompatibility. Directory of Open Access Journals Sweden. Full Text Available There has been a heated argument over self-incompatibilityof chrysanthemum Chrysanthemum morifolium among chrysanthemum breeders. In order to solve the argument, we investigated pistil receptivity, seed set, and compatible index of chrysanthmeum chrysanthemum cultivars.
It was found that the 24 cultivars averagely had 3. However, only 10 of them produced self-pollinated seeds, and their seed sets and compatible indexes were 0. The results indicated that most of chrysanthemum cultivars were self-incompatible, while a small proportion of cultivars were self-compatible. In addition, there is a comprehensive separation of self-incompatibility among progeny from the same self-pollinated self-compatible chrysanthemum cultivar.
Therefore, it is better to emasculate inflorescences during chrysanthemum hybridization breeding when no information concerning icnerariifolium self-incompatibility characteristics is available.
However, if it is self-incompatible and propagated by vegetative methods, it is unnecessary to carry out emasculation when it is used as a female plant during hybridization breeding. Axillary bud development in chrysanthemum. Each chrysanthemum cutting originates from an axillary bud.
For an improvement of the cultivation of cuttings or more specific their quality, it is necessary that the development of an axillary bud can be controlled as good as possible. Axillary bud development can be distinguished into.
This mini-review condenses the knowledge that has been published on chrysanthemum biotechnology, especially in vitro culture in the wider plant science literature. Cineraruifolium andimportant strides were made in molecular breeding, particularly anti-viral strategies, including through transgenics, and our understanding of flower genetics and flowering regulation.
Full Text Available A simple and efficient fingerprinting method for chrysanthemum buds was developed with the aim of establishing a quality control protocol based on biochemical makeup. Chrysanthemum bud samples were successively extracted by water and alcohol. The fingerprints of the chrysanthemum buds samples were obtained using capillary electrophoresis and electrochemical detection CE-ED employing copper and carbon working electrodes to capture all of the chemical information.
The experimental data of 10 batches electropherogram buds by CE were analyzed by correlation coefficient and chyrsanthemum included angle cosine methods. A standard chrysanthemum bud fingerprint including 24 common peaks was established, 12 from each electrode, which was successfully applied to identify and distinguish between chrysanthemum buds from 2 other chrysanthemum species.
These results demonstrate that fingerprint analysis can be used as an important criterion for chrysanthemum buds quality control.
Variation between cut chrysanthemum cultivars in response to suboptimal temperature. To breed for more energy-efficient cut chrysanthemum Chrysanthemum morifolium Ramat. In a greenhouse experiment with 25 chrysanthemum cultivars, a significant variation was observed in.
WRKY transcription factors play important roles in plant growth development, resistance and substance metabolism regulation. However, the exact function of the response to salt stress in plants with specific WRKY transcription factors remains unclear.
Meanwhile, we observed higher expression levels in the leaves contrasted with other tissues. Several parameters including root length, root length, fresh weight, chlorophyll content and leaf gas exchange parameters in transgenic chrysanthemum were much better compared with WT under salt stress. These results suggested that DgWRKY5 could function as a positive regulator of salt stress in chrysanthemum.
Molecular diversity among viroids infecting chrysanthemum in India.
Chrysanthemum cinerariifolium – Pyrethrum – Seeds
Association of Chrysanthemum stunt viroid CSVd and Chrysanthemum chlorotic mottle viroid CChMVd with the Chrysanthemum plants exhibiting severe stunting, distinct yellow leaf mottling, and chlorosis was detected in the main chrysanthemum -growing regions of India. Sequence analysis of 90 cDNA clones obtained for CSVd and CChMVd, representing the chrysanthemum -growing regions of India, revealed the high degree of sequence variation throughout the genome under natural conditions.
Additionally, all the analyzed CChMVd clones revealed the presence of UUUC in the tetraloop, a signature of symptomatic variants in susceptible cultivars. Gene expression profiles responses to aphid feeding in chrysanthemum Chrysanthemum morifolium. Chrysanthemum is an important ornamental plant all over the world. It is easily attacked by aphid, Macrosiphoniella sanbourni.
The molecular mechanisms of plant defense responses to aphid are only partially understood. Here, we investigate the gene expression changes in response to aphid feeding in chrysanthemum leaf by RNA-Seq technology.
Three libraries were generated from pooled leaf tissues of Chrysanthemum morifolium ‘nannongxunzhang’ that were collected at different time points with Y or without CK aphid infestations and mock puncture treatment Zand sequenced using an Illumina HiSeqTM platform. A total of 7,, 7, and 7, clean reads were obtained in library CK, Y and Z, respectively.
These DEGs were involved in phytohormone signaling, cell wall biosynthesis, photosynthesis, reactive oxygen species ROS pathway and transcription factor regulatory networks, and so on. Changes in gene expression induced by aphid feeding are shown to be multifaceted.
There are various forms of crosstalk between different pathways those genes belonging to, which would allow plants to fine-tune its defense responses. Induced mutation altering flower colour in Chrysanthemum. Rooted cuttings were treated with 1. A chimeral flower colour mutant was detected after 1.
After purification through repeated cuttings a mutant clone was developed and released as commercial cultivar ‘Man Bhawan’. It produces bi-coloured flower-heads: By chromatography, 6 pigment spots could be identified in the variety ‘Flirt’ but only 5 in the mutant, violet hRf Spectrophotometric analysis of petal extracts showed presence of three peaks in both ‘Flirt’ and ‘Man Bhawan’ at full bloom stage but only two in ‘Man Bhawan’ at fading stage.
To study the inheritance mode of hexaploid chrysanthemum random or preferential chromosome pairinga segregation analysis was carried out using SSR markers derived from chrysanthemum ESTs in the public domain. Florist chrysanthemum Chrysanthemum morifolium is the single largest beneficiary of mutation breeding efforts across the world. Conventional breeding in chrysanthemum is hampered due to excessive length of the ray florets preventing their pollination besides self-incompatibility.
Mutation breeding therefore is more amenable to induce variability. Clonal fidelity of chrysanthemum regenerated from long term cultures. Full Text Available Morphological characteristics of flowers of long term regenerated chrysanthemumcv. Acclimation of rooted chrysanthemum plantlets at greenhouse conditions was excellent and after appropriate photoperiod “in vitro” plants flowered Flower color changes of “in vitro” plants are observed during another flowering cycle one year after acclimatization.
Observed variations of chrysanthemum flowers could be attributed to epigenetic factors. In-vitro mutation and multiplication of chrysanthemum cultivars. Chrysanthemum is an important ornamental, grown as a cut and potted flower. No other flower rivals its volume of production and sale.
As a result, growers are always on the look out for new or improved blooms which will maintain their market share. New and novel types of chrysanthemum were obtained for flower shape and size, and for plant height, by combining in-vitro radiation and micropropagation. This technique promises a rapid and efficinet method for obtaining new cultivars of vegetatively propagated plants. CmWRKY17 was induced by salinity in chrysanthemumand it might negatively regulate salt stress in transgenic plants as a transcriptional repressor.
WRKY transcription factors play roles as positive or negative regulators in response to various stresses in plants. The expression of CmWRKY17 was induced by salinity in chrysanthemumand a higher expression level was observed in the stem and leaf compared with that in the root, disk florets, and ray florets. The activities of superoxide dismutase and peroxidase and proline content in the leaf were significantly lower in transgenic chrysanthemum than those in the wild type under salinity stress, whereas electrical conductivity was increased in transgenic plants.
Collectively, these data suggest that CmWRKY17 may increase the salinity sensitivity in plants as a transcriptional repressor.