Increasing photosynthesis and biomass of poplars with Burkholderia multivorans WS-J9
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摘要: 为研究Burkholderia multivorans WS-J9对杨树Populus的促生机制,采用LI-400XT便携式光合仪对接菌后的杨树叶片的光合指标及荧光参数进行了测定,同时对杨树叶片的叶绿素质量分数及杨树的苗高、地径和生物量进行了测定。结果表明:在处理期内,接种WS-J9菌株处理的净光合速率(Pn),蒸腾速率(Tr)和气孔导度(Gs)均呈先上升后下降趋势,胞间二氧化碳摩尔分数(Ci)呈先下降后上升趋势,Pn和Tr在整个处理期均高于对照,Ci在整个处理期均低于对照,Gs在第30天时低于对照,其后均高于对照。荧光参数Fv /Fm和PSⅡ值均高于对照;叶绿素总量及叶绿素a/b比值均高于对照;杨树实生苗接菌处理150 d后的苗高、地径和生物量均显著高于对照。研究结果从光合作用及生物量的角度阐明了WS-J9菌株对NL-95杨的促生机制,为生物菌肥的开发与利用提供了参考依据。图4表1参21Abstract: To study the growth-omoting mechanisms of Burkholderia multivorans WS-J9 on poplars, photosynthetic indexes [net photosynthetic rate (Pn), transpiration rate (Tr),stomatal conductance (Gs), and intercellular CO2 concentration (Ci)] and fluorescence parameters [Fv /Fm, PS II, total chlorophyll (TChl), and Chla/Chlb] of NL-95 poplar (Populuseurmericana NL-95)leaves inoculated with a strain of WS-J9 were determined by a portable photosynthetic apparatus (LI-400XT). Simultaneously, chlorophyll content of poplar leaves, seedling height, ground diameter, and biomass were measured. Results showed that during the treatment period (150 days), Pn, Tr and Gs all increased earlier and decreased later with Pn and Tr higher, and Ci lower than control groups (P<0.05). At the 30th day, Gs was lower and after the 60th day higher than the control groups (P<0.05); whereas Ci was reversed. The fluorescence parameters Fv/Fm, PSII, TChl, and Chla/Chlb were higher than the control groups (P<0.05). At the 150th day, seedling height, ground diameter, and biomass were also greater than the control groups (P<0.05). This study illustrated the growth-romoting mechanisms of strain WS-J9 on NL-95 poplar from the perspective of photosynthesis and biomass, provided a reference basis for development and utilization of bio-acterial manure, and could be of great importance in popularizing sustainable agriculture. [Ch, 4 fig. 1 tab. 21 ref.]
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链接本文:
http://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-756.2014.04.012

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