Alstroemeria
Liliaceae
Tulipa
Intramolecular Lyases
Alkenes
Meiotic behaviour of individual chromosomes in allotriploid Alstroemeria hybrids. (1/9)
Chromosome association and chiasma formation were studied in pollen mother cells at metaphase I of four allotriplod BC1 plants (2n=3x=24) obtained from the backcross of the hybrid Alstroemeria aurea x A. inodora with its parent A. inodora. We distinguished the chromosomes of both parental species by genomic in situ hybridization (GISH), whereas the individual chromosomes were identified on the basis of their multicolour FISH banding patterns obtained after a second hybridization with two species-specific satellite repeats as probes. All the four BC1 plants possessed two genomes of A. inodora and one of A. aurea. Variable numbers of recombinant chromosomes, resulting from meiotic recombination in the interspecific hybrid, were present in these plants. The homologous A. inodora chromosomes generally formed bivalents, leaving the homoeologous A. aurea chromosomes unassociated. High frequencies of trivalents were observed for the chromosome sets that contained recombinant chromosomes, even when the recombinant segments were small. Chromosome associations in the trivalents were restricted to homologous segments. The implications of the absence of homoeologous chromosome pairing on gamete constitution and prospects for introgression in Alstroemeria are discussed. (+info)Ethylene and flower longevity in Alstroemeria: relationship between tepal senescence, abscission and ethylene biosynthesis. (2/9)
Senescence of floral organs is broadly divided into two groups: those that exhibit sensitivity to exogenous ethylene and those that do not. Endogenous ethylene production from the former group is via a well-characterized biochemical pathway and is either due to developmental or pollination-induced senescence. Many flowers from the order Liliales are characterized as ethylene-insensitive since they do not appear to produce endogenous ethylene, or respond to exogenous ethylene treatments, however, the majority of cases studied are wilting flowers, rather than those where life is terminated by perianth abscission. The role of ethylene in the senescence and abscission of Alstroemeria peruviana cv. Rebecca and cv. Samora tepals was previously unclear, with silver treatments recommended for delaying leaf rather than flower senescence. In the present paper the effects of exogenous ethylene, 2-chloroethylphosphonic acid (CEPA) and silver thiosulphate (STS) treatments on tepal senescence and abscission have been investigated. Results indicate that sensitivity to ethylene develops several days after flower opening such that STS only has a limited ability to delay tepal abscission. Detachment force measurements indicate that cell separation events are initiated after anthesis. Endogenous ethylene production was measured using laser photoacoustics and showed that Alstroemeria senesce independently of ethylene production, but that an extremely small amount of ethylene (0.15 nl flower(-1) h(-1)) is produced immediately prior to abscission. Investigation of the expression of genes involved in ethylene biosysnthesis by semi-quantitative RT-PCR indicated that transcriptional regulation is likely to be at the level of ACC oxidase, and that the timing of ACC oxidase gene expression is coincident with development of sensitivity to exogenous ethylene. (+info)Isolation of individual egg cells and zygotes in Alstroemeria followed by manual selection with a microcapillary-connected micropump. (3/9)
AIMS: To develop a procedure for isolating living egg cells and zygotes from Alstroemeria ovules. SCOPE: An attempt was made to isolate egg cells and zygotes from the ovules of Alstroemeria aurea. The ovules were histologically observed using a clearing procedure which revealed the localization and sizes of the embryo sacs and egg apparatus within the ovules. For the isolation of egg cells, ovules were cut into sections with a surgical blade and treated with an enzyme solution. Subsequently, these ovule sections were dissected using a glass needle under an inverted microscope. Egg cells successfully isolated by this procedure were collected using microcapillaries connected to a micropump. For zygote isolation, ovules were excised from ovaries 24 h after self-pollination. By treating excised ovules with an enzyme solution and subsequently dissecting them using a glass needle, zygotes were successfully isolated from the ovules and collected with a microcapillary. The isolated zygotes were associated with pollen tubes and one of the synergids. Egg cells and zygotes were viable for up to 2 h following isolation, as determined by fluorescein diacetate staining. CONCLUSIONS: The procedures for isolating egg cells and zygotes in Alstroemeria were established, and each egg cell and zygote was captured with a microcapillary. (+info)A distinct tospovirus causing necrotic streak on Alstroemeria sp. in Colombia. (4/9)
(+info)A specific group of genes respond to cold dehydration stress in cut Alstroemeria flowers whereas ambient dehydration stress accelerates developmental senescence expression patterns. (5/9)
(+info)Deletions and recombinations with the RNA1 3' ends of different tobraviruses have created a multitude of tobacco rattle virus TCM-related RNA2 species in Alstroemeria and tulip. (6/9)
(+info)Volatile emissions of scented Alstroemeria genotypes are dominated by terpenes, and a myrcene synthase gene is highly expressed in scented Alstroemeria flowers. (7/9)
(+info)Ribosomal DNA distribution and a genus-wide phylogeny reveal patterns of chromosomal evolution in Alstroemeria (Alstroemeriaceae). (8/9)
(+info)Alstroemeria is a genus of flowering plants in the family Alstroemeriaceae, native to South America. These perennial plants are known for their showy and colorful flowers, which often have intricate patterns and designs. They are commonly cultivated as ornamental plants in gardens and parks due to their attractive blooms, and they are also used as cut flowers in floral arrangements.
In a medical context, Alstroemeria is not typically used as a treatment or therapy. However, like many plants, Alstroemeria contains various chemical compounds that may have potential medicinal properties. For example, some studies have suggested that extracts from the plant may have anti-inflammatory, antioxidant, and antimicrobial effects. However, more research is needed to determine whether these compounds are safe and effective for use in medical treatments.
It's worth noting that some species of Alstroemeria can be toxic if ingested, so they should not be consumed without consulting a healthcare professional. Additionally, people with allergies to members of the Amaryllidaceae family (which includes Alstroemeria) may experience allergic reactions when handling the plant.
I'm sorry for any confusion, but "Liliaceae" is not a medical term. It is a taxonomic category in botany, specifically it is the family name for plants that include lilies, tulips, and related species. In a medical context, you might be referring to the specific plant species themselves, or possibly the allergic reactions some people can have to the pollen of these plants. If you have any more specific questions about botanical terms in a medical context, I'd be happy to try and help further.
"Arctium" is the genus name for a group of plants commonly known as burdock. These plants are part of the Asteraceae family and are native to Europe and Asia. The most well-known species in this genus are Arctium lappa, which is also known as greater burdock or common burdock, and Arctium minus, which is also called lesser burdock or field burdock.
Burdock plants have large, heart-shaped leaves and tall, branched stems that can grow up to several feet tall. They produce purple or white flowers that are followed by the development of hooked seed burrs, which can easily attach to fur, clothing, and animal skin, allowing the seeds to be dispersed.
Burdock has a long history of use in traditional medicine. The roots and leaves of the plant contain various compounds with potential health benefits, including antioxidants, anti-inflammatory agents, and antibacterial properties. Some people use burdock as a diuretic, a blood purifier, or to treat skin conditions like acne, eczema, and psoriasis. However, it's important to note that more research is needed to confirm these potential benefits and establish safe and effective dosages.
It's also worth noting that burdock can interact with certain medications and may cause side effects in some people, so it's always a good idea to talk to your healthcare provider before starting any new supplement regimen.
"Tulipa" is not a medical term. It is the genus name for Tulips, which are a type of spring-flowering bulb in the family Liliaceae. They are native to Southern Europe and Central Asia, but have been cultivated all over the world for their beautiful flowers.
If you meant to ask about a different term, please let me know and I will be happy to help you find a definition.
Intramolecular lyases are a type of enzyme that catalyzes the breakdown of a molecule by removing a group of atoms from within the same molecule, creating a new chemical bond in the process. These enzymes specifically cleave a molecule through an intramolecular mechanism, meaning they act on a single substrate molecule. Intramolecular lyases are involved in various biological processes, such as DNA replication, repair, and recombination. They play a crucial role in maintaining the integrity of genetic material by removing or adding specific groups of atoms to DNA or RNA molecules.
Alkenes are unsaturated hydrocarbons that contain at least one carbon-carbon double bond in their molecular structure. The general chemical formula for alkenes is CnH2n, where n represents the number of carbon atoms in the molecule.
The double bond in alkenes can undergo various reactions, such as addition reactions, where different types of molecules can add across the double bond to form new compounds. The relative position of the double bond in the carbon chain and the presence of substituents on the carbon atoms can affect the physical and chemical properties of alkenes.
Alkenes are important industrial chemicals and are used as starting materials for the synthesis of a wide range of products, including plastics, resins, fibers, and other chemicals. They are also found in nature, occurring in some plants and animals, and can be produced by certain types of bacteria through fermentation processes.
I'm sorry for any confusion, but "flowers" is not a term that has a medical definition. The term "flowers" is commonly used to refer to the reproductive structures of flowering plants (angiosperms), which are characterized by having both male and female reproductive organs or separate male and female flowers.
If you have any questions related to medical terminology or health conditions, I would be happy to try to help answer those for you!