【摘 要】
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The wodd needs rubber.Rubber is crucial for the tires on the cars,trucks and airplanes that propel mode transportation.It is equally important for daffy tasks:l
【机 构】
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Department of Ecology and Evolutionary Biology,University of California, USA
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The wodd needs rubber.Rubber is crucial for the tires on the cars,trucks and airplanes that propel mode transportation.It is equally important for daffy tasks:latex gloves in the lab,balloons in angioplasty and wetsuits that warm a cold dip in the ocean.Rubber can be made synthetically from petroleum derivatives,but synthetic rubber is not as strong as rubber isolated from plants.The principal plant source for natural rubber (NR) is the sap of the Pará tree (Hevea brasiliensis),which is grown throughout Southeast Asia.Unfortunately,the production capacity of the Pará tree is limited by the availability of suitable land and by labor-intensive harvesting methods.The sustainability of the Pará crop is also constrained by its narrow genetic base,which may make the crop susceptible to disease.
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