Uptake of perfluorinated alkyl acids by hydroponically. Lactuca sativa has many cultivars, which are usually treated as varieties. A historical survey is made of the distribution of the groups of lactuca cultivars over the world. Production of hairy root cultures of lettuce lactuca sativa l. May 29, 2017 lactuca sativa lettuce, an annual herb which belongs to the compositae family, is known for its medicinal value. Comparative effects of inorganic and organic compost. Lactuca sativa capitata synonyms, lactuca sativa capitata pronunciation, lactuca sativa capitata translation, english dictionary definition of lactuca sativa capitata. A taxonomic species within the family asteraceae garden lettuce. May 30, 2014 starr1503260889lactuca sativaseveral varieties in hydroponics greenhouse with kimtown sand islandmidway atoll 24640303483. Effects of nitrogen source on growth, lactuca sativa l.
The focus of modern lettuce breeding objectives is to improve horticultural characteristics such as quality, resistance to early bolting and breeding for resistance to pests and diseases. It is in flower from july to august, and the seeds ripen from august to september. Lettuce lactuca sativa l overview lettuce lactuca sativa l. Lactuca serriola, also called prickly lettuce, milk thistle not to be confused with silybum marianum, also called milk thistle, compass plant, and scarole, is an annual or biennial plant in the dandelion tribe within the daisy family. In the present study, we investigated hybridization under field conditions between crop lettuce lactuca sativa and its wild relative prickly lettuce l. Genus name comes from the latin word lac meaning milk in obvious reference to the milky plant sap. It is the closest wild relative of cultivated lettuce. Lactuca sativa definition of lactuca sativa by the free. Lactuca sativa wikispecies, free species directory. This bibbtype head lettuce has a large compact yellowwhite heart. It is cultivated as leaf vegetable sometimes for its seeds and stem. Lettuce is an economically important crop that can be grown either in the field or greenhouse.
Itis taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. The present study was planned to investigate sleepprolonging effect of this plant. Five varieties iceberg, butterhead, romaine, green coral and. Us20140298546a1 production of hybrid lactuca sativa. Pdf optimization of lightdark cycles of lactuca sativa l.
Lettuce is one of the most important yearround salad vegetables. Safranal, the main volatile chemical of saffron crocus sativus was studied to estimate its allelopathic effects on the photosynthetic pigment chlorophyll, leaf. The genome size has been estimated by flow cytometry to be 2. A comparative high performance liquid chromatography hplc study of 11 lactuca species, based on distributional data of 8 sesquiterpene lactones, revealed that 5 species of the subsection lactuca, that is, lactuca dregeana, l. Romaine is the most upright growing of the four major types of lettuce. The current invention also relates to seed and other plant material obtainable from this plant as well as to a method for. Lactuca sativa was first known in cultivation in ancient egypt. Gardeners can choose looseleaf varieties that do not form heads or grow iceberg lettuces that form a head of tightly overlapping leaves. The species is hermaphrodite has both male and female organs and. It is maist eften growed as a leaf vegetable, but whiles for its stem an seeds.
Although the exact origins of the lettuce are unknown it was certainly known to the greeks and romans, and has been grown in britain since at least the middle of the sixteenth century. The aim of this study was to evaluate the agricultural use of a commercial compost as asoil organic amendment, its effect on weed occurrenceand its residual fertilizer effect on soil. This protocol applies for all varieties of lactuca sativa l. Lactuca sativa capitata definition of lactuca sativa. The present study aimed at enhancing the production of phenolics and flavonoids by hairy root cultures in lactuca serriola commercially available in malaysia abstract this study aimed to determine total antioxidant and antioxidant activity of selected local varieties of lettuce lactuca sativa l. Lactuca sativa synonyms, lactuca sativa pronunciation, lactuca sativa translation, english dictionary definition of lactuca sativa. Lactuca sativa annual or perennial garden plant having succulent leaves used in salads. Lettuce is most often used for salads, although it is also seen in other kinds of food, such as soups, sandwiches and wraps. Lactuca sativa lettuce, garden lettuce pfaf plant database. Evidence from egyptian tomb paintings indicates that it was cultivated before 4500 bc. Lactuca sativa noun the noun lactuca sativa has 1 sense. Vulcan organic lettuce seed johnnys selected seeds.
Lactuca sativa plantinfo everything and anything about. How to plant lettuce lactuca sativa lettuce lactuca sativa is one of the most cultivated and used vegetables in the world. It also serves as an important reference species for research on the compositae, one of the most diverse and successful families of angiosperm plants. Lactuca sativa noun the noun lactuca sativa has 1 sense 1. The present invention concerns hybrid lactuca sativa seeds which have a male sterile genotype and which are heterozygous for at least one distinct gene which provides plants derived from said seeds with a distinct phenotype. Elucidating the genetic basis of antioxidant status in.
Sleepinducing effect of lettuce lactuca sativa varieties. Files are available under licenses specified on their description page. Effects of cyanobacterial toxins and cyanobacterial cellfree crude extract on. Effects of nitrogen source on growth, nutrition, photosynthetic rate and nitrogen metabohsm of mycorrhizal and phosphorusfertihzed plants of lactuca sativa l. Lettuce lactuca sativa is an annual plant o the daisy faimily, asteraceae. Lactucopicrin and lactucin are the major active compounds of lactucarium, and were reported to have analgesic activity equal to or greater than that.
Ars germplasm resources information network lasa3 calphotos lasa3. Us20200029523a1 lactuca sativa with bremia lactucae downy. Genetic transformation and hairy root induction enhance. Lettuce is hardy and can be planted as early as the soil can be worked. Originally from the eastern mediterranean, it is worldwide grown for consumption in salads, with numerous varieties of leaves, colors, shapes, sizes and textures. Ifthe scope of dispersal codes as in botanical files is extended to europe, european d pdfcodes. Sixty f 9 rils, generated from a cross between cultivated lettuce lactuca sativa cv. Lettuce is maist eften uised for salads, awtho it is an aa seen in ither kinds o fuid, such as soups, sandwiches an wraps. Department of agriculture agricultural research service. Lettuce types include romaine, butter head, iceberg, and loose leaf. Oct 08, 2012 an uptake study was carried out to assess the potential human exposure to perfluorinated alkyl acids pfaas through the ingestion of vegetables. It has a slightly fetid odor and is commonly considered a weed of orchards, roadsides and field crops.
How to grow lettuce lactuca sativa lettuce is an ideal crop for beginner growers and seed savers alike. It is thought most likely to have originated from a progenitor similar to l. One variety, the woju ts, or asparagus lettuce celtuce, is grown for. Few salad vegetables exceed lettuce in popularity, and you should have little difficulty in growing it. Lettuce grows readily because all cultivated strains were obtained originally from the prickly lettuce l. Lettuce lactuca sativa is a valuable crop in the united states and worldwide.
Evaluation of biological response of lettuce lactuca sativa. Lettuce lactuca sativa is an annual plant of the daisy family, asteraceae. It is a cool weather crop and grows best at temperatures of 6065f 1618c. Success in producing a steady supply of fresh, crisp leaves, rich in vitamin a, depends to a great extent upon an understanding of the habits of this plant. Encapsulated bioactive agents applied to the lactuca sativa l. Hosted by the usgs core science analytics and synthesis. The species is hermaphrodite has both male and female organs and is pollinated by flies. It is not difficult to grow lettuce successfully provided you keep in mind that all types need wellprepared soil that is rich in organic material, regular thorough watering and feeding every two weeks. That hybrids between lactuca sativa and two wild lactuca species, l. Growth, yield and quality response to nitrogen fertilization in a noncirculating hydroponic system, journal of plant nutrition, doi. An uptake study was carried out to assess the potential human exposure to perfluorinated alkyl acids pfaas through the ingestion of vegetables. Ijms free fulltext distinct metabolome changes during. Lettuce is cultivated worldwide, and is one of the most consumed green leafy vegetables in.
Uptake of perfluorinated alkyl acids by hydroponically grown. This plant also has excellent medicinal properties. Genetic transformation and hairy root induction enhance the. Us20200029523a1 lactuca sativa with bremia lactucae.
Page designed through the cooperative efforts of interagency itis teams. However, it is not a legal authority for statutory or regulatory purposes. Influenced as nitrogen fertilizer and plant spacing find, read and cite all the research. It is most often grown as a leaf vegetable, but sometimes for its stem and seeds. Lactuca sativa article about lactuca sativa by the free. The experiment was conducted in the research field of sherebangla agricultural university, dhaka from october 2014 to february 2015. Lactuca serriola is the wild progenitor of cultivated lettuce lactuca sativa, and can be affected by lettuce downy mildew, one of the most serious diseases of lettuce. Lactuca sativa lettuce, an annual herb which belongs to the compositae family, is known for its medicinal value. Jan 30, 2019 botanically speaking, the plant lactuca sativa includes few basic types, like leaf lettuce, romaine, iceberg, and butterhead, but youll want to mix other popular greens into your dishes for the. Lactuca sativa is an annual plant belonging to daisy family asterceae. Plant in the spring or fall when temperatures are still cool lettuce bolts in warm.
Xxvii international horticultural congress ihc2006. Comparative effects of inorganic and organic compost fertilization on lettuce lactuca sativa l. Keane, in genetic improvement of vegetable crops, 1993. The enhancement of plant secondary metabolites content in. Potentiating effects of lactuca sativa on pentobarbital. Different challenges are present in either environment.
Lettuce is a globally important leafy vegetable with the united states being the largest world producers. Hasan and others published growth and yield of lettuce lactuca sativa l. The objective of phase 1 was to determine the influence of. This heatresistant variety is long lasting, bolt resistant, and free of mosaic disease. Starr1503260889lactuca sativaseveral varieties in hydroponics greenhouse with kimtown sand islandmidway atoll 24640303483. It is now the most important leafy salad vegetable. Pdf several studies have reported that the circadian rhythm of leaf lettuce lactuca. Temperature strongly influences lettuce lactuca sativa l. Different lettuce genotypes respond differently to higher temperatures or thermal stress. However, there was a significant limit in the development of useful plant material due to the regrown plants having very low fertility even when numerous backcross generations were produced. The invention also concerns a method for producing hybrid lactuca sativa seeds, comprising a step for culture, in an enclosed medium, of phenotypically male sterile plants. Lettuce facts, health benefits and nutritional value. Lettuce lactuca sativa was grown in pfaaspiked nutrient solutions at four different concentrations, ranging from 10 ngl to 10.
Lettuce is cultivated worldwide, and is one of the most consumed green leafy vegetables in the raw form for its taste and high nutritive value. Careful variety selection is important for hot weather plantings. While every effort has been made to provide the most reliable and uptodate information available, ultimate legal requirements with respect to species are contained in. Hybridization rates between lettuce lactuca sativa and. Eleven perfluorinated carboxylic acids pfcas and three perfluorinated sulfonic acids pfsas were analyzed. Lactuca sativa is further characterized by a yellow corolla, white pappus, involucral bracts erect in fruit, and a flat cypsela body that has 5 to 9nerved faces, the body terminated by an elongate, filiform beak. The present study aimed at enhancing the production of phenolics and flavonoids by hairy root cultures in lactuca. Firstly it was cultivated by ancient egyptians who turned it from a weed and seeds were used for producing oil, a food plant which is grown for its succulent leaves. Lettuces are made up of over 95 per cent water, but contribute other essential components of our diet such as vitamin a.
Leaves of the species contain vitamins a, b9, c, and k and can be eaten as a salad. The hydroalcoholic extract hae of lettuce and its water fraction wf, ethyl acetate fraction eaf, and nbutanol fraction nbf were administrated ip to mice 30 min before the pentobarbital injection. Lactuca sativa capitata distinguished by leaves arranged in a dense rosette that develop into a compact ball head lettuce butterhead lettuce. This cylindricallyhearted lettuce known to the romans as cappadocian lettuce is now called roman lettuce or more commonly, romaine. For hydroponic greenhouse lettuce there is relatively little published information on cultivar selection under different lighting sources. Traditionally, lettuce has been suggested to have a sedativehypnotic property.
Lactuca sativa in the germplasm resources information network grin, u. Tissue culture applications in lettuce lactuca sativa l. Traditionally, lactuca sativa lettuce has been recommended for its hypnotic property. All structured data from the file and property namespaces is available under the creative commons cc0 license. Eleven perfluorinated carboxylic acids pfcas and three perfluorinated sulfonic acids pfsas were analyzed by. It forms within the genus lactuca a somewhat isolated genetic compatibility group with three wild species that also have nine pairs of chromosomes, l. Hybridization rates between lettuce lactuca sativa and its. The current invention concerns a lactuca sativa plant resistant to bremia lactucae, characterized in that the bremia resistance locus is linked to a genetic determinant and obtainable from the genome of a wild lactuca plant, preferably from the genome of lactuca serriola.
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