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奇妙的吃虫植物--猪笼草

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  • 121.32.164.*
奇妙的吃虫植物 
  吃动物的植物,全世界有500多种,其中猪笼草的捕虫器最精巧复杂。猪笼草为附生植物, 是攀援状的亚灌木,大多数生长在印度洋群岛、马达加斯加、斯里兰卡、印度尼西亚等潮湿热带森林里,我国广东、云南等省也有这种植物。 
  猪笼草一般高不及一米,个别的也有高达三米的。叶片长椭圆形,长10—25公分,宽4—8公分。叶片的顶端连接着向下弯曲的卷须,在卷须的顶端有一捕虫囊。捕虫囊圆筒形,下半部稍膨大,有些像猪笼,故称猪笼草。在海南当地人多叫它雷公壶,意指它像农民盛酒用的壶,在雨天响雷下雨时,捕虫囊装上雨水,就好像酒壶灌了酒一样。如果雨天盛水过多,卷须承受不了重量,它会自动倾斜,倒去囊内一部分水。这样有利于发挥捕虫囊的捕虫作用,因为如果囊内盛满水,昆虫掉在水里后就容易爬出逃逸。 
  猪笼草吃虫,全靠它奇特的叶子。它的叶片中脉伸出去变成卷须,可以攀附着别的东西向上升。卷的顶部生出一个囊状物,好像奶瓶子一样,口上有一个盖,能开也能关。瓶口边缘向内卷,瓶内有半瓶子水液。瓶口内壁能分泌又甜又香的蜜汁,贪吃的小昆虫闻到香味就会爬过去吃蜜。也许就在它们吃得正得意的时候,脚下突然一滑,一头栽到瓶中,被水液粘住了,再也无法逃命。捕虫囊下半部的内面,囊壁稍厚,并有很多消化腺,这些腺体在昆虫未掉入囊内时,已分泌出稍带黏性的消化液储存在囊底。消化液呈酸性,有消化昆虫的能力。有些人以为昆虫坠入囊内后,囊盖会自动关闭。其实它并没有那幺灵敏。 
  其它吃虫植物如茅膏菜、毛毡苔、捕蝇草等,虽然也能捕捉昆虫,但它们的捕虫工具,远不及猪笼草的精巧复杂。 



1楼2007-04-20 18:33回复
    看不出这小小的东西会吃虫?~?


    禁言 |3楼2007-09-17 14:29
    回复
      • 59.41.191.*
      是看不出!
      你家在深圳做什么的呢?不是开花圃的吧?


      4楼2007-09-27 20:47
      回复
        • 59.36.179.*
        是不要、\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\


        5楼2007-10-12 11:38
        回复
          • 125.36.82.*
          c


          6楼2008-09-02 18:17
          回复
            • 60.183.190.*
            是叶子还是花


            7楼2008-12-11 19:00
            回复
              • 222.248.1.*
              gutuyytukkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk你


              8楼2009-09-20 12:24
              回复
                • 122.225.62.*
                知道了!!!!!!!!!!!!!!!????????????????


                9楼2010-06-13 14:01
                回复
                  • 122.225.62.*
                  回复:7楼
                  是叶子!!!!!!!!!!!!!!!!!!!!!!!!!!


                  10楼2010-06-13 14:08
                  回复
                    • 122.225.62.*
                    怎么可以吃呢?


                    11楼2010-06-17 14:00
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                      • 122.225.62.*
                      哇!!!!!!!!!!!!!!!!!!!!!!!!!!


                      12楼2010-06-17 14:04
                      回复
                        • 122.225.62.*
                        好厉害!!!!!!!!!!!!!!!!!!!


                        13楼2010-06-17 14:13
                        回复