三、植物园的新任务——种质保存在一百多年前,全世界有将近265,000种植物。在这些植物中,上一世纪中灭绝的大致不超过1,000种。但现在这种灭绝的速度正在迅速增长。目前地球上的植物正以每天平均1种的速度从地球上消失。而且几乎可以肯定,在未来的几十年内还将继续这样发展。地球上 Third, the new task of the botanical gardens - The germplasm was preserved more than 100 years ago, there were nearly 265,000 plants in the world. Among these plants, there are roughly no more than 1,000 extinct species in the last century. But now the speed of this extinction is rapidly increasing. At present, plants on the earth are disappearing from the earth at an average rate of 1 per day. And it is almost certain that it will continue to develop in the coming decades. on the earth