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(Science: botany) a composite plant of the genus Lactuca (L. Sativa), the leaves of which are used as salad. Plants of this genus yield a milky juice, from which lactucarium is obtained. The commonest wild lettuce of the united states is L. Canadensis. Hares lettuce, lambs lettuce. See hare, and lamb. Lettuce opium. See Lactucarium. Sea lettuce, certain papery green seaweeds of the genus ulva.

Origin: oe. Letuce, prob. Through old french from some Late latin derivative of L. Lactuca lettuce, which, according to Varro, is fr. Lac, lactis, milk, on account of the milky white juice which flows from it when it is cut: cf. F. Laitue. Cf. Lacteal, Lactucic.

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Plants without sunlight?

depends on plant :) some can germinate with or without light. lettuce needs it

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by warnv18
Fri Oct 19, 2012 4:29 pm
Forum: Botany Discussion
Topic: Plants without sunlight?
Replies: 14
Views: 6507

Science project on lettuce seed germination

HI! I am doing a science fair project on how deep i should plant a lettuce seed and how it affects the germination process. Does anyone know anything that could help a junior high student? :?: thanks!!

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by warnv18
Fri Oct 19, 2012 4:15 pm
Forum: Botany Discussion
Topic: Science project on lettuce seed germination
Replies: 2
Views: 1748

question about edible drug in plants

Dears I want to produce drug in plants (Molecular farming) by expression my gene in lettuce. i have a challenge, it is enzymatic degradation in the stomach. my question is " Are there any amino acid sequences that protect my drug in stomach?" can i attached ...

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by ardalan
Fri Mar 02, 2012 5:08 pm
Forum: Cell Biology
Topic: question about edible drug in plants
Replies: 1
Views: 733

Cellular Respiration

... photons are stored in the chloroplasts where photosynthesis occurs and produces glucose-6-phosphate. Humans ingest green plants such as spinach or lettuce. What I don't know is how we process glucose or how it enters the cell. I know how cellular respiration works, thus how ATPs are produced. Thank ...

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by dustyyLA
Mon Oct 31, 2011 8:28 pm
Forum: Cell Biology
Topic: Cellular Respiration
Replies: 3
Views: 3184

Protoplast Isolation

... extended essay in biology, obviously, and I am requesting some assistance on the topic. My experiment involves the isolation of protoplasts from lettuce leaf. The second part of the experiment is the fusion of the protoplasts, but I won't get into that as my problem comes before this. First off, ...

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by ev350
Thu Sep 08, 2011 8:23 pm
Forum: Cell Biology
Topic: Protoplast Isolation
Replies: 2
Views: 5786
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