Physiological Integration for Carbon in Mayapple (Podophyllum peltatum), a Clonal Perennial Herb

Landa, K.; Benner, B. L.; Watson, Maxine A.; Gartner, Janna

doi:10.2307/3544960

Cited by 72 publications

(87 citation statements)

References 24 publications

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“…Root biomass remains greater than shoot biomass after disturbance though allocation to roots is comparatively small Storage Similar species of rhizomatous oaks have been reported to store enough C belowground that repeated, complete aboveground harvests may not kill the rhizomes (Woods et al 1959). It has been suggested that plant species can develop prolific belowground root structures not as a conduit for C transfer, but primarily as an accessible C pool to support regrowth following severe aerial disturbances (Lacey 1974;Landa et al 1992;Matlack 1997). Our study demonstrated that the belowground 13 C signal does not distribute over a broad lateral range (Fig.…”

Section: Discussionmentioning

confidence: 99%

Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks

2002

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Portions of a regenerating scrub oak ecosystem were enclosed in open-top chambers and exposed to elevated C0 2 . The distinct 13 C signal of the supplemental C0 2 was used to trace the rate of C integration into various ecosystem components. Oak foliage, stems, roots and ectomycorrhizae were sampled over 3 years and were analyzed for 13 C composition. The aboveground tissue 13 C equilibrated to the novel 13 C signal in the first season, while the belowground components displayed extremely slow integration of the new C. Roots taken from ingrowth cores showed that 33% of the C in newly formed roots originated from a source other than recent photosynthesis inside the chamber. In this highly fireprone system, the oaks re-establish primarily by resprouting from large rhizomes, demobilization from belowground C stores may support fine roots and mycorrhizae for several years into stand re-establishment and, therefore, may explain why belowground tissues contain less of the new photosynthate than expected. Though it has been shown that long-term cycles of C storage are theoretically advantageous for plants in systems with frequent and severe disturbances, such patterns have not been previously examined in wild systems.

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Section: Discussionmentioning

confidence: 99%

Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks

2002

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“…Physiological integration may involve both reresults in accumulation of ramets ('feeding sites') source translocation (Slade & Hutchings, 1987c; (Bell, 1984) in favourable patches (Hutchings, 1988;Marshall, 1990;Evans, 1992;Landa et al, 1992) and Sutherland & Stillman, 1988; de Kroon & van translocation of phytohormones (Cook, 1985;Pitelka & Ashmun, 1985;Hutchings & Bradbury, 1986;Callaghan et al, 1992). Thus, the impact of external stimuli (e.g.…”

Section: Introduction Physiological Integration May Influence This Localmentioning

confidence: 99%

Morphological plasticity of the clonal herb Lamiastrum galeobdolon (L.) Ehrend. & Polatschek in response to partial shading

Dong

1993

New Phytologist

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SUMMARYThe present experiment investigates the morphological plasticity of Lamiastrum galeobdolon (L.) Ehrend. & Polatschek in response to light patchiness. In a garden experiment, stolons of the plant were grown under the following six light regimes: high light, low light, from low light to high light, from high light to low light, under high light but with the apical region of the stolon under low light, and under low light but with the apical region under high light. The low-light conditions provided 50% of high light PAR and 28% of high light R/FR ratio (ratio of red to far red light), and simulated the canopy-like shade that may be relevant to this species in its natural habitat.Plants growing under different light treatments did not show significant differences in total plant dry weight, total number of ramets, number of primary ramets, number of secondary ramets, and number of branches per clone. L. galeobdolon plants growing under high-light conditions formed shorter internodes, shorter petioles and smaller laminas with lower SLA, and showed higher branching intensity than those growing under low-light conditions. Accordingly, when growing between patches of different light conditions, the primary ramets had shorter internodes, shorter petioles and smaller laminas with lower SLA in high-light than in low-light patches. Exposing the apical region, of an otherwise shaded stolon, to high light shortened its internodes, compared with those of plants growing entirely under low-light conditions. Shading the apical region, of otherwise unshaded stolon, had no efTect on the lengths of these internodes. In contrast, the morphology of the leaf responded to local light conditions only.Elongation of stolon internodes was completed much faster (within 2 or 3 wk) than lamina expansion and petiole extension, which took at least 6 wk.These results are interpreted in terms of the efficiency of exploitation of high-light patches within the habitat of L. galeobdolon.

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“…We know from our earlier studies that significant root growth occurs on older ramets throughout the autumn (Landa et at., 1992) which, in all likelihood, is the period when new mycorrhizae form (Ingram and Watson, unpublished data). In the studies reported here, the roots at the youngest ramet position (X + 1) had not yet experienced autumn growth when they were harvested and all root development by the X + 1 ramet had taken place under hot summer conditions, which are not conducive to mycorrhiza formation (Allen, 1983).…”

Section: Discussionmentioning

confidence: 99%

“…14C-translocation studies show that by summer's end, the specific activity of 14C is highest in the roots of the X and X + 1 ramets (Fig. 2 in Landa et al, 1992;Watson et al, submitted). But the pattern of enrichment is complex.…”

Section: Discussionmentioning

confidence: 99%

Ecology and Evolutionary Biology of Clonal Plants

Stuefer¹,

Erschbamer²,

Huber³

et al. 2002

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Physiological Integration for Carbon in Mayapple (Podophyllum peltatum), a Clonal Perennial Herb

Cited by 72 publications

References 24 publications

Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks

Extensive belowground carbon storage supports roots and mycorrhizae in regenerating scrub oaks

Morphological plasticity of the clonal herb Lamiastrum galeobdolon (L.) Ehrend. & Polatschek in response to partial shading

Ecology and Evolutionary Biology of Clonal Plants

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