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7 resultats
Characterization of volatile production during storage of lettuce (Lactuca sativa) seed.
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The duration that seeds stay vigorous during storage is difficult to predict but critical to seed industry and conservation communities. Production of volatile compounds from lettuce seeds during storage was investigated as a non-invasive and early detection method of seed ageing rates. Over 30
Light exposure during storage preserving soluble sugar and l-ascorbic acid content of minimally processed romaine lettuce (Lactuca sativa L.var. longifolia).
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Minimally processed romaine lettuce (MPRL) leaves were stored in light condition (2500lux) or darkness at 4°C for 7d. Light exposure significantly delayed the degradation of chlorophyll and decrease of glucose, reducing sugar, and sucrose content, and thus preserved more total soluble solid (TSS)
Genetic mapping of turnip mosaic virus resistance in Lactuca sativa.
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Presence of the dominant Tu gene in Lactuca sativa is sufficient to confer resistance to infection by turnip mosaic virus (TuMV). In order to obtain an immunological assay for the presence of TuMV in inoculated plants, the TuMV coat protein (CP) gene was cloned by amplification of a cDNA
[The dynamic of calcium distribution during megasporegenesis of lettuce (Lactuca sativa L.)].
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Potassium antimonite was used to deposit calcium in the young ovule of lettuce (Lactuca sativa L.) at megasporogenesis stage to study the relationship between calcium and megaspore degeneration. At the megaspore mother cell stage, few calcium granules were formed in the cell (Plate I-1, 2). After
[The character of calcium distribution in developing anther of lettuce (Lactuca sativa L.)].
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Potassium antimonite was used to locate calcium in the anther of lettuce (Lactuca sativa L) during its development. At the early stage of anther development there were few calcium granules in microspore mother cells and the cells of anther wall. After meiosis of microspore mother cells, calcium
[Studies on the calcium distribution in developing synergids of lettuce (Lactuca sativa L.)].
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Potassium antimonite was used to locate calcium in the synergids of lettuce (Lactuca sativa L) during their development. The two synergids on 3d before anthesis formed evident polarity with most cytoplasm located in the micropylar end and nucleus in the middle and a big vacuole in the chalazal end.
Standardized extract of Lactuca sativa Linn. and its fractions abrogates scopolamine-induced amnesia in mice: A possible cholinergic and antioxidant mechanism.
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OBJECTIVE
The present study was designed to evaluate the efficacy of Lactuca sativa (LS) Linn. (Asteraceae) against scopolamine-induced amnesia and to validate its traditional claim as memory enhancer.
METHODS
Ethanol extract of fresh LS leaves (LSEE), standardized on the basis of quercetin content,
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