为什么要研究植物.pptVIP

* * /features/bremen/ * * * /biofuels/placemat.shtml * * /albums/j14/biopact/biodegradable_bags.jpg * Plant cell walls provide important durable materials Wood is primarily composed of plant cell walls. Photo credit: tom donald Cell walls Photo credit: /plants; Zhong, R., et al., (2008) Plant Cell 20:2763-2782 . Primary plant cell walls are composed mainly of carbohydrates and proteins. Some cells produce a rigid secondary wall that incorporates lignin, an insoluble cross-linking compound. Wood and fibers are everywhere Rembrandt van Rijn (1631) Clothing made from plant fibers (cotton, linen) Plant fibers are used for making paper, and before that papyrus. Wood is used for buildings and furniture. Painting canvas is made from flax or hemp fibers. Plants provide fibers for paper and fabric Cotton is being bred for increased pest resistance and better fiber production. Photo credits: Chen Lab; IFPC The genome sequence of poplar, a source of fiber for paper, was recently completed This information is being used to improve the efficiency of paper production. Photo credit: ChmlT Plants can replace petroleum for many products and purposes . Unfortunately, it takes millions and millions of years to convert dead organic material into petroleum...and we are running out of it. Petroleum is NOT a renewable resource Plants can replace petroleum for many products and purposes Unfortunately, it takes millions and millions of years to convert dead organic material into petroleum.... And we are running out of it. Petroleum is NOT a renewable resource When I grow up I want to be a fossil fuel . Plants can be a source of biofuels Energy from sunlight Image source: Genome Management Information System, Oak Ridge National Laboratory Sugars, starches and cellulose can be fermented into ethanol Plants can be a source of biodiesel Image sources: Tilo Hauke, University of Minnesota, Iowa State University Extension. Biodiesel produced from rape, algae and soybeans a