摘要
为研究Burkholderia multivorans WS-FJ9对杨树Populus的促生机制,采用LI-6400XT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-FJ9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ΦPSⅡ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-FJ9菌株对NL-895杨的促生机制,为生物菌肥的开发与利用提供了参考依据。
To study the growth-promoting mechanisms of Burkholderia multivorans WS-FJ9 on poplars, photosynthetic indexes [net photosynthetic rate （Pn）, transpiration rate （T r）, stomatal conductance （G,） , and in tercellular CO2 concentration （Ci）] and fluorescence parameters [Fv /Fm ΦPSⅡ, total chlorophyll （TChl）, and Chla/Chlb] of NL-895 poplar （Populus x euramericana NL-895）leaves inoculated with a strain of WS-FJ9 were determined by a portable photosynthetic apparatus （LI-6400XT）. Simultaneously, chlorophyll content of poplar leaves~ period seedling height, ground diameter, and biomass were measured. Results showed that during the treatment （150 days）, Pm, Tr and Gs all increased earlier and decreased later with P and Tr higher, and Ci lower than control groups （P〈0.05）. At the 30th day, G was lower and after the 60th day higher than the control groups （P〈0.05）; whereas Ciwas reversed. The fluorescence parameters Fv /Fm ΦPSⅡ, TChl, and Chla/Chlb were higher than the control groups （P〈0.05）. At the 150th day, seedling height, ground diameter, and biomasswere also greater than the control groups （P〈0.05）. This study illustrated the growth-promoting mechanisms of strain WS-FJ9 on NL-895 poplar from the perspective of photosynthesis and biomass, provided a reference basis for development and utilization of bio-bacterial manure, and could be of great importance in popularizing sustainable agriculture.
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2014年第4期570-576,共7页
Journal of Zhejiang A&F University
基金
国家林业公益性行业科研专项(201004061)
江苏省重大科技支撑与自主创新专项项目(BE2008393)
江苏省普通高校研究生科研创新计划项目(CXLX11-0552)
江苏高校优势学科建设工程资助项目(PAPD)
关键词
植物生理学
促生机制
光合参数
荧光参数
叶绿素
生物量
plant physiology
growth-promoting mechanisms
photosynthetic parameters
fluorescence parame-ters
chlorophyll
biomass
