scientists are reporting a key advance toward development of a way to combat the terrible plant diseases that caused the irish potato famine（饥荒，饥饿） and still 1（造成，遭受） billions of dollars of damage to crops each year around the world. their study appears in acs' bi-weekly journal organic letters. teck-peng loh and colleagues point out that the phytophthora 2 cause extensive damage to food crops such as potatoes and soybeans（大豆，黄豆） as well as to 3 plants（观赏植物） like azaleas（杜鹃花） and rhododendrons（杜鹃花） . one species of the 4 caused the irish potato famine in the 5 1840s. that disaster resulted in nearly one million deaths from starvation and forced millions more people to flee ireland for the united states and other countries. still difficult to control despite the use of modern 6, the fungus continues to cause $6 billion in damage to global potato crops 7. scientists, however, have 8 a key 9, alpha-1, that allows phytophthora to reproduce. the hormone exists in several different forms, and a 10 version of the most biologically active form could provide the basis for developing a way to control the fungus and reduce its threat, the scientists suggest.
they describe an advance toward this goal, the synthesis of a particularly active form of the mating hormone called (3r,7r,11r,15r)-hormone alpha-1. the scientists also showed that they could make 11 large quantities of the hormone. the advance could open the door to an effective method to fight this ancient 12, they suggest.
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