Effects of Plant Growth-Promoting Rhizobacteria on Loblolly and Slash Pine Seedlings
Effects of Plant Growth-Promoting Rhizobacteria on Loblolly and Slash Pine Seedlings
复制标题
植物促生根际细菌对火炬松和湿地松幼苗的影响
DOI：
10.1093/forestscience/44.1.139
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发表时间：
1998
期刊：
影响因子：
1.4
通讯作者：
J. Kloepper
中科院分区：
文献类型：
--
作者：
S. Enebak;G. Wei;J. Kloepper
在温室条件下，用12种不同的植物根际促生细菌（PGPR）菌株中的1种接种火炬松和湿地松种子。发芽时间和幼苗密度测定在21天，幼苗生物量测定在播种后12周。所有细菌菌株显着增加出苗速度比未经处理的松树种子。然而，到12周，没有观察到细菌处理和未处理的种子之间的任何松树品种的林分密度的差异。当用12种细菌菌株中的3种处理种子时，火炬松芽后立枯病有所减少;然而，湿地松幼苗的芽后立枯病不受根际细菌的影响。根际细菌处理对苗木生长和生物量有显著的正效应和负效应，但这取决于树种。火炬松芽和根的长度，以及地上和地下的生物量，显着减少时，种子处理菌株BS 1和BS 2。与此相反，火炬松种子处理菌株BS 3，PM 2，和INR 7显着增加地下生物量的幼苗根系。湿地松幼苗与细菌菌株有类似的相互作用。与未处理的种子相比，菌株BS 1显着降低了芽长度，而菌株90-166、INR 7和SE 49增加了芽生物量。湿地松根的长度和生物量也减少处理菌株BS 1和BS 2。与火炬松不同，没有细菌菌株增加湿地松根长或生物量。本研究表明，根际细菌接种对出苗和植物生长的影响是独立的，并且这种影响具有种特异性。For. Sci. 44（1）：139-144。
Loblolly and slash pine seed were inoculated at sowing with 1 of 12 different strains of plant growth-promoting rhizobacteria (PGPR) in the greenhouse. Time to germination and seedling densities were determined at 21 days, and seedling biomass was measured at 12 wk after sowing. All bacterial strains significantly increased the speed of seedling emergence over nontreated pine seed. By 12 wk, however, no differences in stand densities were observed between bacteria-treated and nontreated seed for either pine species. Postemergence damping-off was reduced in loblolly pine when seed was treated with 3 of the 12 bacterial strains; however, postemergence damping-off on slash pine seedlings was not affected by rhizobacteria. Treatment with rhizobacteria had a significant positive and negative effect on seedling growth and biomass, which depended on tree species. Loblolly pine shoot and root lengths, as well as the above- and belowground biomass, were significantly reduced when seeds were treated with strains BS1 and BS2. In contrast, loblolly pine seeds treated with strains BS3, PM2, and INR7 significantly increased the below ground biomass of the seedling root systems. Slash pine seedlings had similar interactions with the bacterial strains. Strain BS1 significantly reduced shoot lengths compared with nontreated seeds, while strains 90-166, INR7, and SE49 increased shoot biomass. Slash pine root lengths and biomass were also reduced when treated with strains BS1 and BS2. Unlike loblolly pine, no bacterial strain increased slash pine root length or biomass. This study suggests that the effects of rhizobacteria inoculation on seedling emergence and plant growth are independent and that the effects are species specific. For. Sci. 44(1):139-144.