Sticky plant captures prey for symbiotic bug: Is this digestive mutualism?
Sticky plant captures prey for symbiotic bug: Is this digestive mutualism?
复制标题
粘性植物捕获共生虫的猎物：这是消化互利共生吗？
DOI：
10.1111/j.1438-8677.2012.00573.x
复制
发表时间：
2012
期刊：
影响因子：
3.9
通讯作者：
I
中科院分区：
文献类型：
--
作者：
Anderson;B.;Kawakita;A. and Tayasu;I
许多植物捕捉并杀死昆虫，但直到最近，只有具有消化酶的食肉植物才能直接从这些昆虫的营养中获益。最近的研究表明，一些食肉植物缺乏消化酶，并与共生昆虫进化出了消化互惠关系，为它们消化猎物。大萼杜鹃（Rhododendron macrosepalum）是一种具有粘性叶子的植物，可以捕捉昆虫，与共生的盲蝽（Mirid bugs）有联系，盲蝽会吃掉捕获的昆虫。在这里，我们确定什么性质的关系是米里德和植物之间。我们发现，大萼蛙没有自己的消化酶，但它似乎没有能力通过它的叶角质层吸收半翅目昆虫的粪便。自然发生的15N和14N水平被用来确定大隔膜红盖菇没有通过与盲蝽的结合获得氮，它从土壤中获得所有的氮。另一方面，米里德似乎从植物捕获的昆虫以及植物组织中获得氮。植物与盲蝽属植物的关系不是消化共生关系，更可能是一种对抗关系。这项研究增加了我们对消化互惠进化的理解，并表明单独捕获昆虫或与共生昆虫关系相结合并不一定使植物“食肉”。
Many plants capture and kill insects but, until relatively recently, only carnivorous plants with digestive enzymes were known to gain directly from the nutrients of those insects. Recent studies show that some carnivorous plants lack digestive enzymes and have evolved digestive mutualisms with symbiotic insects that digest their prey for them.Rhododendron macrosepalum, a plant with sticky leaves that captures insects, has an association with symbiotic Mirid bugs that consume the insects captured. Here, we determine what the nature of the relationship is between Mirid and plant. We find thatR. macrosepalumhas no digestive enzymes of its own but that it does not seem to have the ability to absorb hemipteran faeces through its leaf cuticle. Naturally occurring levels of15N and14N were used to determine thatR. macrosepalumgains no nitrogen through its association with the Mirid bugs and that it obtains all of its nitrogen from the soil. The Mirids, on the other hand, seem to obtain nitrogen from insects captured by the plant, as well as from plant tissues. The relationship between plant and Mirid is not a digestive mutualism but more likely an antagonistic relationship. This study adds to our understanding of how digestive mutualisms evolve and shows that insect capture alone, or in combination with a symbiotic insect relationship does not necessarily make a plant ‘carnivorous’.