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Submitted Videos - Contest 2 (Pages)

Callus growth was followed over the course of three weeks. The resulting undifferentiated tissue dances with joy at the growth potential it possesses. A Leaf is born-The Microscopical Initiation of a Leaf through the Lens of a Scanning Electron Microscope Md. Shafiullah Technical Summary of video content: Plants produce food for other living organisms through a process called photosynthesis and the factory of the produced food is the leaf. How the leaf is produced from a mass of cells is shown in this video through the lens of a scanning electron microscope. This work is the part of the research project of Md. Shafiullah who created the video in collaboration with his supervisor C. R. Lacroix, Professor of Biology at the University of Prince Edward Island, in Canada. All rights are reserved to the members of the Morphospace Laboratory, Dept. of Biology, and University of Prince Edward Island, Canada.   Venus Flytrap Video Scott Klasek General Summary of video content: This video is a compilation of clips of Venus Flytrap (Dionaea muscipula) snap traps opening and closing, set to an edited version of Leonard Bernstein's Candide Overture. I selected this music because its spontaneous dynamic changes and comic, upbeat melody pair well with the abrupt movement of the snap traps. Many clips are time-lapsed, sped up, and even played backwards, and although they might not reflect the accurate, real-time movement of the traps, they clearly illustrate a few points that are often overlooked about these fantastic plants: they grow in wet, swampy conditions, their trap leaves include hairs that initiate closing once they are stimulated twice by movement, and that the traps eventually reopen after closing. These are some of the details that are to be noted, as they are not common knowledge to most people. However, given the simplicity of the video, it is intended for a general audience, and will hopefully invoke amusement and speculation into the detailed workings of this magnificent and unusual plant. Additional Information: I hope you enjoyed it. It was fun to make! Pollination Methods: Solanum Part 1 Karl Haro von Mogel Technical, Part of a Series Summary of video content: Pollination Methods: Solanum is part of a series of step-by-step, instructional videos on how to make controlled crosses with plants. The videos will cover a wide range of techniques applicable to open-pollinated, insect-pollinated, and self-pollinated crops, ranging from agronomic to horticultural species. The controlled pollination method videos are technically-oriented and are targeted to high school and college students with some background in plant biology. They will be useful for students learning about plant breeding methods, and may be of interest to backyard and commercial hybridizers of various crops. The Solanum video explains the biology and origin of tomato and potato species and how to make controlled crosses with those plants yourself. Some of the methods commercial seed producers use are mentioned, and finally, the concept of polyploidy is explained with potatoes, and how breeders take it into account when breeding new varieties. Additional Information: This video has been split into two parts. For a full-length, higher-quality version of the video, or to download it to your computer, visit: http://www.wisconsinplantbreeding.com/educators/videos/pollination-methods-solanum/.   Pollination Methods: Solanum Part 2 Karl Haro von Mogel Technical, Part of a Series Summary of video content: Pollination Methods: Solanum is part of a series of step-by-step, instructional videos on how to make controlled crosses with plants. The videos will cover a wide range of techniques applicable to open-pollinated, insect-pollinated, and self-pollinated crops, ranging from agronomic to horticultural species. The controlled pollination method videos are technically-oriented and are targeted to high school and college students with some background in plant biology. They will be useful for students learning about plant breeding methods, and may be of interest to backyard and commercial hybridizers of various crops. The Solanum video explains the biology and origin of tomato and potato species and how to make controlled crosses with those plants yourself. Some of the methods commercial seed producers use are mentioned, and finally, the concept of polyploidy is explained with potatoes, and how breeders take it into account when breeding new varieties. Additional Information: This video has been split into two parts. For a full-length, higher-quality version of the video, or to download it to your computer, visit: http://www.wisconsinplantbreeding.com/educators/videos/pollination-methods-solanum/. Vitamin C and Water in Plants Debbie Swarthout General Summary of video content: This video provides a description of the role

Created on Jan 09, 2010

Natural priming (crpVideo)

Priming is a widely used technique to enhance the seed potential in relation to the range and uniformity of germination. Priming consists in a controlled imbibition of seeds in order to improve some metabolic events without germination to be completed. In the soil seed bank, seeds are exposed to a variable environment including variations in temperature and water potential. These factors may vary in one single day causing periods of hydration-dehydration that resembles laboratory priming.My colaborator

Created on Apr 12, 2009

Pressure bomb (crpVideo)

This video is a visual 10 step instruction manual how to use a pressure bomb for measuring water pressure in the xylem of transpiring leaves. It is an entry for the www.ChloroFilms.org video competition. Water in the xylem is under negative pressure. This tension can be measured by a “pressure bomb”. Tension pressure in a non-transpiring leaf is “equivalent” to water potential of cells surrounding the xylem (mesophyll cells), because the xylem’s osmotic potential is negligible. A single leaf is sealed in the pressure chamber with the cut surface protruding through a rubber stopper. Pressure is applied to the shoot from a tank of compressed air (or nitrogen) until xylem sap appears at the cut ends of the xylem. The hydrostatic pressure inside the xylem elements is then identical to the applied external pressure. The amount of pressure that must be applied to force water out of the leaf cells into the xylem is regarded as equal to the xylem tension when the leaf was cut from the plant. This video

Created on Apr 12, 2009

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