普病第三章植物病原线虫和寄生性种子植物.pptVIP

中国菟丝子 寄生性植物的防治 菟丝子为例： 种子卫生：严禁调运带有菟丝子种子的种苗 轮作或间作：豆类与禾本科植物 生物防治：炭疽病菌生物制剂-鲁宝1号 诱捕植物：trap crop and catch crop 拔除病株： 肉苁蓉 独脚金 无根藤 Plant-parasitic nematode genome sequence There are numerous plant-parasitic nematodes in the world, but only a handful are responsible for the largest part of an estimated $157 billion in agricultural damage globally every year. Nematodes are small worms that burrow into plant roots and feed off living cells. Now, Iowa State University researchers have contributed to the release of the annotated genome of one of the most destructive nematodes: Meloidogyne incognita -- the southern root-knot nematode, as reported recently in the journal Nature Biotechnology. Sequencing the genome is a critical step toward comprehensively understanding how the organism works and may pave the way for research on ways to fight the pest. This is considered to be one of, if not the most important plant-parasitic nematode species across the world, said Thomas Baum, professor and chair of plant pathology and head of Iowa State Universitys contribution to the genome sequence project. Root-knot nematodes are so important because they can be found almost anywhere in the world on almost any plant, he said. Nematodes are the most abundant animals on earth. Many of the nematodes that are really bad pathogens are very specialised on which plant they attack, said Baum. This nematode has a huge host range. For us nematologists, it is very interesting and challenging to study. Because the pest is so widespread, many nematologists around the world were eager to help with the project. The lead investigator was Pierre Abad of the Insitut National de Recherche Agronomiquea, a French research group, with help from researchers in Belgium, Holland, Great Britain, Switzerland, and Iowa State University and North Carolina State University in the US. Because it is such a worldwide problem, people are eager to contribute, Baum said. Also, because it is the first plant-parasitic nematode t