Isoprene emission-free poplars - a chance to reduce the impact from poplar plantations on the atmosphere
Isoprene emission-free poplars - a chance to reduce the impact from poplar plantations on the atmosphere
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DOI：
10.1111/j.1469-8137.2011.03979.x
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发表时间：
2012-04-01
期刊：
影响因子：
9.4
通讯作者：
Schnitzler, Joerg-Peter
中科院分区：
文献类型：
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作者：
Behnke, Katja;Grote, Ruediger;Schnitzler, Joerg-Peter
根据大气成分的不同，植物排放的异戊二烯会对空气质量和区域气候产生严重影响。对植物本身来说，异戊二烯可以增强植物的抗逆性，也可以干扰植物对食草动物和拟寄生虫的吸引。本研究通过RNA干扰技术（PcISPS-RNAi植物）抑制了异戊二烯的释放，在室外条件下测试了两个生长季节的杨树（Populus x canescens）的生长性能和适合度。与对照相比，PcISPS-RNAi处理后的杨树的生长和生物量均未受到影响，甚至暂时有所提高。年度碳平衡模型显示，由于不排放异戊二烯，碳损失减少了总初级生产量的2.2%，PcISPS-RNAi杨树的净增长率提高了6.9%。然而，异戊二烯释放量的降低导致对真菌感染的敏感性降低，而对食草动物的吸引力增强。由于减少异戊二烯的排放可能会对区域气候和空气质量产生积极影响，因此本研究有望利用不排放或低排放异戊二烯的杨树进行更可持续和更环保的生物质生产。
Depending on the atmospheric composition, isoprene emissions from plants can have a severe impact on air quality and regional climate. For the plant itself, isoprene can enhance stress tolerance and also interfere with the attraction of herbivores and parasitoids. Here, we tested the growth performance and fitness of Populus x canescens in which isoprene emission had been knocked down by RNA interference technology (PcISPS-RNAi plants) for two growing seasons under outdoor conditions. Neither the growth nor biomass yield of the PcISPS-RNAi poplars was impaired, and they were even temporarily enhanced compared with control poplars. Modelling of the annual carbon balances revealed a reduced carbon loss of 2.2% of the total gross primary production by the absence of isoprene emission, and a 6.9% enhanced net growth of PcISPS-RNAi poplars. However, the knock down in isoprene emission resulted in reduced susceptibility to fungal infection, whereas the attractiveness for herbivores was enhanced. The present study promises potential for the use of non- or low-isoprene-emitting poplars for more sustainable and environmentally friendly biomass production, as reducing isoprene emission will presumably have positive effects on regional climate and air quality.