NDLI: Nitrogen translocation between clonal mother and daughter trees at a grassland

Content Provider	Springer Nature Link
Author	Pin, Bradley D. Wilson, Scott D.
Copyright Year	2014
Abstract	There is abundant evidence from short-term experiments using herbs that nutrients can be translocated from mother ramets to daughter ramets, but there is little long-term evidence from woody plants. Here, we examine translocation in field populations of a clonal tree over two growing seasons. We applied $^{15}$N to mothers or daughters in clones of Populus tremuloides at the northern edge of the North American Great Plains, where mother ramets form closed-canopy stands on relatively nutrient-rich soils, and daughter ramets occur nearby in relatively nutrient-poor grasslands. Unlabeled daughters in clones with labeled mothers had δ$^{15}$N values significantly greater than those in unlabeled clones, confirming translocation from mothers to daughters. However, unlabeled mothers in clones with labeled daughters also had δ$^{15}$N values significantly greater than those in unlabeled clones, indicating translocation from daughters to mothers. Further, the total foliage accumulation of added $^{15}$N was significantly (c. 10×) greater in mothers than in daughters, suggesting that more N was translocated from daughters to mothers, than from mothers to daughters. Thus, $^{15}$N moved both from mothers to daughters and from daughters to mothers, with net flow toward mothers. Because long-lived woody ramets in the field face nutrient competition from other ramets, interspecific neighbors, and soil microbes, the environmental availability of nutrients for uptake may be low for both mother and daughter ramets, causing translocation within a clone to be toward larger ramets with greater demand.
Starting Page	347
Ending Page	354
Page Count	8
File Format	PDF
ISSN	13850237
Journal	Plant Ecology
Volume Number	215
Issue Number	3
e-ISSN	15735052
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-02-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aspen Heterogeneity Invasion Isotope Nitrogen Nutrient Patch Root Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Plant Science

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