Search VTechWorks



Advanced Search

Browse

My Account

Statistics

Watch Registration Video

Return to Skip Menu .

Main Content

Show simple item record

dc.contributor.author Kim, Seonhwa
dc.contributor.author Lowman, Scott
dc.contributor.author Hou, Guichuan
dc.contributor.author Nowak, Jerzy
dc.contributor.author Flinn, Barry
dc.contributor.author Mei, Chuansheng
dc.date.accessioned 2012-10-01T15:10:21Z
dc.date.available 2012-10-01T15:10:21Z
dc.date.issued 2012-05-30
dc.identifier.citation Biotechnology for Biofuels. 2012 May 30;5(1):37
dc.identifier.uri http://dx.doi.org/10.1186/1754-6834-5-37
dc.identifier.uri http://hdl.handle.net/10919/19006
dc.description.abstract AbstractBackgroundSwitchgrass is one of the most promising bioenergy crop candidates for the US. It gives relatively high biomass yield and can grow on marginal lands. However, its yields vary from year to year and from location to location. Thus it is imperative to develop a low input and sustainable switchgrass feedstock production system. One of the most feasible ways to increase biomass yields is to harness benefits of microbial endophytes.ResultsWe demonstrate that one of the most studied plant growth promoting bacterial endophytes, Burkholderia phytofirmans strain PsJN, is able to colonize and significantly promote growth of switchgrass cv. Alamo under in vitro, growth chamber, and greenhouse conditions. In several in vitro experiments, the average fresh weight of PsJN-inoculated plants was approximately 50% higher than non-inoculated plants. When one-month-old seedlings were grown in a growth chamber for 30 days, the PsJN-inoculated Alamo plants had significantly higher shoot and root biomass compared to controls. Biomass yield (dry weight) averaged from five experiments was 54.1% higher in the inoculated treatment compared to non-inoculated control. Similar results were obtained in greenhouse experiments with transplants grown in 4-gallon pots for two months. The inoculated plants exhibited more early tillers and persistent growth vigor with 48.6% higher biomass than controls. We also found that PsJN could significantly promote growth of switchgrass cv. Alamo under sub-optimal conditions. However, PsJN-mediated growth promotion in switchgrass is genotype specific.ConclusionsOur results show B. phytofirmans strain PsJN significantly promotes growth of switchgrass cv. Alamo under different conditions, especially in the early growth stages leading to enhanced production of tillers. This phenomenon may benefit switchgrass establishment in the first year. Moreover, PsJN significantly stimulated growth of switchgrass cv. Alamo under sub-optimal conditions, indicating that the use of the beneficial bacterial endophytes may boost switchgrass growth on marginal lands and significantly contribute to the development of a low input and sustainable feedstock production system.
dc.title Growth promotion and colonization of switchgrass (Panicum virgatum) cv. Alamo by bacterial endophyte Burkholderia phytofirmans strain PsJN
dc.type Journal Article
dc.date.updated 2012-10-01T15:10:21Z
dc.description.version Peer Reviewed
dc.language.rfc3066 en
dc.rights.holder Seonhwa Kim et al.; licensee BioMed Central Ltd.

Files in this item



This item appears in the following Collection(s)

Show simple item record

.