Disentangling who is who during rhizosphere acidification in root interactions: combining fluorescence with optode techniques
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In: Frontiers in Plant Science, Vol. 4, No. OCT, 392, 10.10.2013.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Disentangling who is who during rhizosphere acidification in root interactions: combining fluorescence with optode techniques
AU - Faget, Marc
AU - Blossfeld, Stephan
AU - von Gillhaussen, Philipp
AU - Schurr, Ulrich
AU - Temperton, Victoria Martine
PY - 2013/10/10
Y1 - 2013/10/10
N2 - Plant-soil interactions can strongly influence root growth in plants. There is now increasing evidence that root-root interactions can also influence root growth, affecting architecture and root traits such as lateral root formation. Both when species grow alone or in interaction with others, root systems are in turn affected by as well as affect rhizosphere pH. Changes in soil pH have knock-on effects on nutrient availability. A limitation until recently has been the inability to assign species identity to different roots in soil. Combining the planar optode technique with fluorescent plants enables us to distinguish between plant species grown in natural soil and in parallel study pH dynamics in a non-invasive way at the same region of interest (ROI). We measured pH in the rhizosphere of maize and bean in rhizotrons in a climate chamber, with ROIs on roots in proximity to the roots of the other species as well as not-close to the other species. We found clear dynamic changes of pH over time and differences between the two species in rhizosphere acidification. Interestingly, when roots of the two species were interacting, the degree of acidification or alkalization compared to bulk soil was less strong then when roots were not growing in the vicinity of the other species. This cutting-edge approach can help provide a better understanding of plant-plant and plant-soil interactions.
AB - Plant-soil interactions can strongly influence root growth in plants. There is now increasing evidence that root-root interactions can also influence root growth, affecting architecture and root traits such as lateral root formation. Both when species grow alone or in interaction with others, root systems are in turn affected by as well as affect rhizosphere pH. Changes in soil pH have knock-on effects on nutrient availability. A limitation until recently has been the inability to assign species identity to different roots in soil. Combining the planar optode technique with fluorescent plants enables us to distinguish between plant species grown in natural soil and in parallel study pH dynamics in a non-invasive way at the same region of interest (ROI). We measured pH in the rhizosphere of maize and bean in rhizotrons in a climate chamber, with ROIs on roots in proximity to the roots of the other species as well as not-close to the other species. We found clear dynamic changes of pH over time and differences between the two species in rhizosphere acidification. Interestingly, when roots of the two species were interacting, the degree of acidification or alkalization compared to bulk soil was less strong then when roots were not growing in the vicinity of the other species. This cutting-edge approach can help provide a better understanding of plant-plant and plant-soil interactions.
KW - Biology
KW - Ecosystems Research
KW - plant roots
KW - interaction
KW - green fluorescent protein
KW - pH planar optodes
KW - rhizotrons
KW - rhizosphere
KW - maize
KW - bean
KW - Sustainability Science
UR - http://www.scopus.com/inward/record.url?scp=84901038349&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/d00e7ad6-ccaf-306d-90f3-f3c395155a7e/
U2 - 10.3389/fpls.2013.00392
DO - 10.3389/fpls.2013.00392
M3 - Journal articles
C2 - 24137168
VL - 4
JO - Frontiers in Plant Science
JF - Frontiers in Plant Science
SN - 1664-462X
IS - OCT
M1 - 392
ER -