| 词汇 | example_english_lettuce-seed |
| 释义 | lettuce seedcollocation in Englishmeanings of lettuceand seedThese words are often used together. Click on the links below to explore the meanings. Or, see other collocations with seed. lettuce noun[C or U] uk /ˈlet.ɪs/ us /ˈlet̬.ɪs/ a plant with large, green leaves, eaten uncooked ... See more at lettuce seed noun uk /siːd/ us /siːd/ a small, round or oval object produced by a plant and from which, when it is planted, a new plant ... See more at seed Examples of lettuce seedThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Only volatiles from intact tissues affected germination, causing a delay, as well as a reduction in lettuceseed germination60. The force of the expanding embryo most likely contributes to lettuceseed germination, as does endosperm weakening. Since lettuce grows best under cooler temperatures, meal must be applied early enough in the season to avoid temperatures above the optimum range for lettuceseed germination. These results suggest that ethylene plays an essential role in lettuceseed germination, regardless of the conditions for germination or the means used to induce it. In the present study, enzyme activity at the completion of lettuceseed priming reached 65-70% of the total activity assayed from seeds immediately after visible radicle protrusion. While a decrease in lettuceseed raffinose content was correlated with reduced longevity, it is not possible from these experiments to test whether the relationship is causal. Guedes et al. (1981) observed a progressive loosening of the endosperm during priming, possibly indicative of endosperm weakening, thus allowing lettuceseed germination to proceed at high temperature. A thick-walled surrounding layer, such as the endosperm in lettuce seeds, can act as a barrier for too rapid a water influx. Priming of lettuce seeds is a form of dormancy breaking. Sixteen lettuce seeds were planted 1 week after the last meal application. The relationship between the longevity of lettuce seeds and the molecular mobility was investigated in the cytoplasm of lettuce radicles. We studied priming in celery, tomato and lettuce seeds. Effects of butenolide on light-mediated germination in the germination of light-sensitive lettuce seeds by affecting gibberellin metabolism? Thus, the mechanism of priming in lettuce seeds that allows embryonic growth and/or causes endosperm weakening is still unclear. The estimated longevity of lettuce seeds was calculated using the viability equation, in order to compare longevity with rotational motion in the cytoplasm at different temperatures. Weges et al. (1991) measured the osmotic potentials of primed lettuce seeds and reported that the temperature requirement for 50% germination was not associated with osmotic adjustment of cells. Smith (1991) utilized acetone and resin in a graded series to infiltrate dry lettuce seeds over several days, but penetration of the resin was still poor. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Want to learn more? Go to the definition of lettuce Go to the definition of seed See other collocations with seed |
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