Aspects of the Comparative Physiology of Ranunculus bulbosus L. and Ranunculus repens L.

Ginzo, H. D.; Lovell, P. H.

doi:10.1093/oxfordjournals.aob.a084745

Cited by 28 publications

(2 citation statements)

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“…However, the role of the unrooted stolons in carbon source-sink relationships is speculative as we did not measure their carbon import and export separately. While the unrooted stolons may have acted as strong sinks driving the translocation (Ginzo & Lovell, 1973, Alpert 1999, Golovko et al 2004), they may have been photosynthetically self-sufficient due to their developed leaves. Accordingly, several cases of unrooted and poorly rooted daughters tended to show higher carbon translocation to mothers (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, it is not possible to distinguish these two translocation strategies in studies that do not involve environmental gradients. Nevertheless, many tracing studies use homogeneous conditions that do not allow the identification of resource-sharing strategies (e.g., Ginzo & Lovell, 1973; Alpert, 1996; D’Hertefeldt & Jonsdottir, 1999). Further, our results demonstrate the necessity of bidirectional tracing for the recognition of translocation strategies.…”

Section: Discussionmentioning

confidence: 99%

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Strategies of resource sharing in clonal plants: A conceptual model and an example of contrasting strategies in two closely related species

Duchoslavová,

Jansa

2024

Preprint

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Background and AimsClonal growth helps plants to cope with environmental heterogeneity through resource integration via connecting organs. Such integration is considered to balance heterogeneity by the translocation of resources from rich to poor patches. However, such an ‘equalisation’ strategy is only one of several possible strategies, as we discuss in a brief conceptual analysis. Under certain conditions, a strategy emphasising acropetal movement and exploration of new areas or a strategy accumulating resources in older ramets may be preferred. The optimal strategy may be determined by environmental conditions, such as resource availability and level of light competition. Therefore, species from different habitats may exhibit distinct resource translocation strategies.MethodsResource translocation was compared between two closely related species from different habitats with contrasting productivity. The study examined the bidirectional translocation of carbon and nitrogen in pairs of mother and daughter ramets grown under light heterogeneity (one ramet shaded) at two developmental stages using stable-isotope labelling.Key resultsAt the early developmental stage, both species translocated resources toward daughters and the translocation was modified by shading. Later, the species of low-productivity habitats,Fragaria viridis, translocated carbon to shaded ramets, according to the ‘equalisation’ strategy. The species of high-productivity habitats,Potentilla reptans, did not support shaded older ramets. Nitrogen translocation remained mainly acropetal in both species. These findings confirmed our expectations.ConclusionsThe two studied species exhibited different translocation strategies, which may be linked to the habitat conditions experienced by each species. The ‘equalisation’ strategy may occur in habitats with lower productivity and lower light competition, than the strategy emphasising acropetal movement. The results indicate that we need to consider different possible strategies. We emphasise the importance of bidirectional tracing in translocation studies and the need for further studies to investigate the translocation patterns in species from contrasting habitats.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Strategies of resource sharing in clonal plants: A conceptual model and an example of contrasting strategies in two closely related species

Duchoslavová,

Jansa

2024

Preprint

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Comparison of Intraspecific Variations in the Reproduction and Photosynthesis of an Understory Herb, Arnica Cordifolia

Young

1983

American J of Botany

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Intraspecific variations in the reproduction of individual ramets and monospecific patches of the understory herb Arnica cordifolia Hook. were compared with variations in photosynthesis and understory light conditions. Ramets and patches were compared from three microhabitats (open, intermediate, and shaded) that differed in daily integrated irradiance. Individual ramets from open microhabitats (> 12 MJ m−2 d−1) had 23% more total dry wt and produced twice as many seeds, when compared to ramets from shaded locations (< 5 MJ m−2 d−1). In addition, monospecific patches from open locations were 63% more dense, and estimates of seed and vegetative patch reproductive effort were 4 and 2 times greater, respectively, when compared to shaded plant patches. For all measurements, ramets and patches from intermediate understory locations (6–10 MJ m−2 d−1) were intermediate in reproductive capacity between those of open and shaded locations. In addition, A. cordifolia seeds from open microhabitats germinated significantly better (45%) than either intermediate or shaded location seeds under high light and only seeds from shaded microhabitats germinated (14%) in the dark. Compared to shaded location plants, the greater total dry weight and seed production of individual ramets and the greater estimated reproductive effort of patches from open locations corresponded to a greater maximum photosynthetic rate (16.9 μmoles m−2 s−1) and daily carbon gain (12.2 g m−2 d−1). Possibly, a greater photosynthetic capacity may make more photosynthetic resources available for reproduction by A. cordifolia plants in open locations. Thus, intraspecific variation in physiology may contribute to intraspecific variation in reproduction.

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Anatomical changes during adventitious root formation

Lovell

White

1986

New Root Formation in Plants and Cuttings

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Aspects of the Comparative Physiology of Ranunculus bulbosus L. and Ranunculus repens L.

Cited by 28 publications

References 0 publications

Strategies of resource sharing in clonal plants: A conceptual model and an example of contrasting strategies in two closely related species

Strategies of resource sharing in clonal plants: A conceptual model and an example of contrasting strategies in two closely related species

Comparison of Intraspecific Variations in the Reproduction and Photosynthesis of an Understory Herb, Arnica Cordifolia

Anatomical changes during adventitious root formation

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