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Mutualism-disrupting allelopathic invader drives carbon stress and vital rate decline in a forest perennial herb.

Brouwer NL, Hale AN, Kalisz S - AoB Plants (2015)

Bottom Line: Over a single growing season, the loss of RFS could reduce a plant's photosynthetic physiology and carbon storage.Alliaria-treated plants exhibit significant overall reductions in total non-structural carbohydrates and have 17 % less storage carbohydrates relative to controls.Together, our results are consistent with the hypothesis that disruption of a ubiquitous mutualism following species invasion creates symptoms of carbon stress for species dependent on RFS.

View Article: PubMed Central - PubMed

Affiliation: Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA brouwern@gmail.com.

No MeSH data available.


Related in: MedlinePlus

Maianthemum racemosum rhizome carbohydrate content (%) from Alliaria (yellow) and Hesperis (control; black) treatments in the greenhouse experiment. Total NSC content is shown in solid-coloured bars. Total NSC is a composite measure of stored sugars (inulin; bars with diagonal shading) and mobile sugars (sucrose; stippled bars). Values are least squares means from ANCOVAs ±1 standard error. *P < 0.05; **P < 0.005.
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PLV014F1: Maianthemum racemosum rhizome carbohydrate content (%) from Alliaria (yellow) and Hesperis (control; black) treatments in the greenhouse experiment. Total NSC content is shown in solid-coloured bars. Total NSC is a composite measure of stored sugars (inulin; bars with diagonal shading) and mobile sugars (sucrose; stippled bars). Values are least squares means from ANCOVAs ±1 standard error. *P < 0.05; **P < 0.005.

Mentions: All M. racemosum plants examined exhibit colonization by internal RFS structures. However, Maianthemum's rhizome carbohydrates were significantly affected by the Alliaria treatment (MANCOVA; Roy's greatest root = 7.57, P = 0.002), with plants in the Alliaria treatment experiencing a significant reduction in total NSC (Fig. 1; ANCOVA F1,36 = 7.31, P = 0.01). Specifically, plants treated with Alliaria stored, on average, 17 % less inulin relative to plants in the Hesperis treatment (Fig. 1; ANCOVA F1,36 = 9.28, P = 0.004). While plants in the Alliaria treatment had fewer stored sugars, they had higher sucrose concentrations in their rhizomes compared with plants in the Hesperis treatment (Fig. 1; ANCOVA F1,36 = 12.88, P = 0.001). The increase in mobile sugars did not compensate for the dramatic difference in stored sugars between treatments as total NSC in the Alliaria-treated plants was 13 % lower than that of Hesperis-treated plants. Harvest date was not a significant predictor of total NSC, inulin or sucrose.Figure 1.


Mutualism-disrupting allelopathic invader drives carbon stress and vital rate decline in a forest perennial herb.

Brouwer NL, Hale AN, Kalisz S - AoB Plants (2015)

Maianthemum racemosum rhizome carbohydrate content (%) from Alliaria (yellow) and Hesperis (control; black) treatments in the greenhouse experiment. Total NSC content is shown in solid-coloured bars. Total NSC is a composite measure of stored sugars (inulin; bars with diagonal shading) and mobile sugars (sucrose; stippled bars). Values are least squares means from ANCOVAs ±1 standard error. *P < 0.05; **P < 0.005.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4374104&req=5

PLV014F1: Maianthemum racemosum rhizome carbohydrate content (%) from Alliaria (yellow) and Hesperis (control; black) treatments in the greenhouse experiment. Total NSC content is shown in solid-coloured bars. Total NSC is a composite measure of stored sugars (inulin; bars with diagonal shading) and mobile sugars (sucrose; stippled bars). Values are least squares means from ANCOVAs ±1 standard error. *P < 0.05; **P < 0.005.
Mentions: All M. racemosum plants examined exhibit colonization by internal RFS structures. However, Maianthemum's rhizome carbohydrates were significantly affected by the Alliaria treatment (MANCOVA; Roy's greatest root = 7.57, P = 0.002), with plants in the Alliaria treatment experiencing a significant reduction in total NSC (Fig. 1; ANCOVA F1,36 = 7.31, P = 0.01). Specifically, plants treated with Alliaria stored, on average, 17 % less inulin relative to plants in the Hesperis treatment (Fig. 1; ANCOVA F1,36 = 9.28, P = 0.004). While plants in the Alliaria treatment had fewer stored sugars, they had higher sucrose concentrations in their rhizomes compared with plants in the Hesperis treatment (Fig. 1; ANCOVA F1,36 = 12.88, P = 0.001). The increase in mobile sugars did not compensate for the dramatic difference in stored sugars between treatments as total NSC in the Alliaria-treated plants was 13 % lower than that of Hesperis-treated plants. Harvest date was not a significant predictor of total NSC, inulin or sucrose.Figure 1.

Bottom Line: Over a single growing season, the loss of RFS could reduce a plant's photosynthetic physiology and carbon storage.Alliaria-treated plants exhibit significant overall reductions in total non-structural carbohydrates and have 17 % less storage carbohydrates relative to controls.Together, our results are consistent with the hypothesis that disruption of a ubiquitous mutualism following species invasion creates symptoms of carbon stress for species dependent on RFS.

View Article: PubMed Central - PubMed

Affiliation: Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA brouwern@gmail.com.

No MeSH data available.


Related in: MedlinePlus