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第817章 噩耗连连放线菌(2 / 2)

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同时排便也要快速,如果粟沙蚤吃了东西迟迟不拉,放线菌们就会憋死在它的消化道里,只有粟沙蚤吃了菜叶初步消化后迅速拉出去,才能让更多的放线菌传播开来。

飞散到环境中的放线菌,不用直接寄生坚硬的植物外皮,可以先吃裹在身边的粟沙蚤排泄物,更容易消化一些,可以作为适应环境的缓冲食物。

如果粟沙蚤能侥幸长大,放线菌当然也希望它拼命繁殖,把二者的子子孙孙互相绑定起来。

“有点恶心。”夏万三咽了口唾沫,“老师您继续说。”

“我们观察到一个现象,粟沙蚤死亡之后,运动不会立即停止,而是会受体内放线菌的刺激,继续蹦跳排泄,完成最后一次放线菌的传播。”宋河说。

夏万三恍然大悟,“所以说……之前被农药喷倒的粟沙蚤,挣扎片刻又踉踉跄跄地蹦起来,并不是体内成功解毒了,而是被放线菌控制,死了的肉体最后蹦跳几次?”

“不是几次,是几十次,我们测到的一只粟沙蚤,死亡后又蹦跳了三十五次。”宋河道,“这就是我所说的僵尸效应!”

“鸡皮疙瘩起来了,真就僵尸虫子呗?不感染人类吧?”夏万三搓了搓胳膊,苦瓜脸道,“怪不得农药喷不死,感情是一堆虫子尸体在蹦跶啊!”

“设计粟沙蚤的人,技术含量非常高。”凌奕奕凝重道。

宋河点头,“第三个坏消息,过捕和长期毒素累积。”

“过捕的概念都记得吧?动物界广泛存在的概念,斑鬣狗杀瞪羚,狼冲进羊圈里杀羊,乃至战争年代人类干掉人类,都有过捕。”

“记得,您上课时讲过,过捕是指动物杀掉远远超过食量的猎物。狼吃掉一只羊就饱了,但有些狼会狂性大发,连杀几十只羊,杀完也不拖走食用,只是杀掉而已。”凌奕奕点头,“战争年代侵略军喜欢屠杀平民,也是类似的状态。”

“记得蚊子咬人的流程吧?”宋河话锋一转,“吸血的同时,蚊子还会把唾液注入人体,减缓血凝速度便于它吸血,人被蚊子咬了长包,就是蚊子唾液导致的。”

三个学生一齐点头,他们在北非天天搓两三盒乘黄驱蚊膏,就是为了避免蚊虫叮咬。

“放线菌出现了类似的情况,过捕和注入唾液。”宋河解释,“它们释放孢子的同时,会排出一些抗生素和植物细胞溶解液。抗生素还好说,事情坏在溶解液上!”

“溶解液会烧掉大量植物细胞,并顺着植物的导管筛管扩散,继而大量烧伤整个植株体内的细胞。”

“所以会出现什么情况?譬如一棵珍珠粟,只有一片叶子感染了放线菌,但只要这片叶子上的放线菌数量够多,整棵植株最后会崩溃性死亡!”

“这就给杀菌工作带来极大挑战,并不是杀菌剂潦草地喷一喷就能解决,必须照顾到大部分部位,否则最后还是容易死。”

宋河说到这,气氛已经凝重得有些吓人了,三个学生几乎是煎熬地在听这些消息。

“目前知道的坏消息只有这些。”宋河说,“我的人手在加紧研究,后续可能会有其他消息,我会第一时间通知你们。”

“老师……那现在怎么办?”夏万三绝望地问,“照您说的,放线菌应该已经扩散开了,只不过暂时还没形成规模,可局面崩溃只是时间问题!”

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