Skip to Main Content
Tolerance or avoidance: drought frequency determines the response of an N 2 -fixing treeAuthor(s): Jeffrey M. Minucci; Chelcy Ford Miniat; Robert O. Teskey; Nina Wurzburger
Source: New Phytologist
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
Download Publication (493.0 KB)
Description• Climate change is increasing drought frequency, which may affect symbiotic N2 fixation (SNF), a process that facilitates ecosystem recovery from disturbance. Here, we assessed the effect of drought frequency on the ecophysiology and SNF rate of a common N2-fixing tree in eastern US forests.
•We grew Robinia pseudoacacia seedlings under the same mean soil moisture, but with different drought frequency caused by wet–dry cycles of varying periodicity.
•We found no effect of drought frequency on final biomass or mean SNF rate. However, seedlings responded differently to wet and dry phases depending on drought frequency. Under low-frequency droughts, plants fixed carbon (C) and nitrogen (N) at similar rates during wet and dry phases. Conversely, under high-frequency droughts, plants fixed C and N at low rates during dry phases and at high rates during wet phases.
•Our findings suggest that R. pseudoacacia growth is resistant to increased drought frequency because it employs two strategies – drought tolerance or drought avoidance, followed by compensation. SNF may play a role in both by supplying N to leaf tissues for acclimation and by facilitating compensatory growth following drought. Our findings point to SNF as a mechanism for plants and ecosystems to cope with drought
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationMinucci, Jeffrey M.; Miniat, Chelcy Ford; Teskey, Robert O.; Wurzburger, Nina. 2017. Tolerance or avoidance: drought frequency determines the response of an N 2 -fixing tree . New Phytologist. 215(1): 434-442. https://doi.org/10.1111/nph.14558.
Keywordsacclimation, climate change, compensatory growth, ecosystem, lag times, Robinia pseudoacacia (black locust), symbiotic nitrogen fixation, temporal variability.
- Drought sensitivity of an N 2 ‐fixing tree may slow temperate deciduous forest recovery from disturbance
- Interaction of biochar type and rhizobia inoculation increases the growth and biological nitrogen fixation of Robinia pseudoacacia seedlings
- Classification of chemicals in black locust Robinia pseudoacacia wood and bark
XML: View XML