Developmental Constraints: Effect on Population Growth and Patterns of Resource Allocation in a Clonal Plant

Watson, Maxine A.

doi:10.1086/284212

Cited by 227 publications

(142 citation statements)

References 39 publications

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“…The production of reproductive branches also causes a drop in the ramet production rate, due to the involvement of two meristem types (Watson, 1984). In the present study, the density rise associated with space restriction, which caused increased shading, determined the ramet birth rate drop, since there were very few cases of flowering.…”

Section: Biomass Productionmentioning

confidence: 50%

On two methods to estimate production of Eichhornia crassipes in the eutrophic Pampulha reservoir (MG, Brazil)

Greco

Freitas

2002

Braz. J. Biol.

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This paper deals with variations in biomass and in the production of Eichhornia crassipes (water hyacinth) in a eutrophic tropical reservoir. Net production was assessed by both a traditional method and a demographic approach. The initial biomass ranges from 96 g DW.m -2 to a maximum of 2027 g DW.m -2 . Net production estimates varied greatly according to which method was used to calculate them (traditional: 20.6 ton DW.hectare -1 .year -1 , demographic: 226.9 ton DW.year -1 ).Key words: Eichhornia crassipes (water hyacinth), biomass production, modular demography, macrophytes. RESUMO Sobre dois métodos para estimar a produção de Eichhornia crassipes no reservatório eutrófico Pampulha (MG, Brasil)Este estudo mostra as variações da biomassa e da produção de Eichhornia crassipes em um reservatório eutrófico tropical. A produção líquida foi estimada por intermédio do método tradicional e do demográfico. A biomassa inicial de 96 g PS.m -2 chegou ao máximo de 2.027 g PS.m -2 A produção líquida variou de acordo com o método utilizado para sua estimativa (tradicional: 20,6 ton PS. ha -1 .ano -1 , demográfico: 226,9 ton PS.ano -1 ).Palavras-chave: Eichhornia crassipes (aguapé), produção de biomassa, macrófitas, método demográfico.

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Section: Biomass Productionmentioning

confidence: 50%

On two methods to estimate production of Eichhornia crassipes in the eutrophic Pampulha reservoir (MG, Brazil)

Greco

Freitas

2002

Braz. J. Biol.

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“…This assimilated carbon may be directed towards vegetative growth and reproduction simultaneously. According to the resource allocation theory (Harper 1977;Watson 1984), there is a trade-off relationship in carbon allocation between reproduction and growth when they depend on same C-pool that is known as the cost of reproduction (Obeso 2002). Therefore, physiological interaction between vegetative growth and reproduction are important in the study of plants life history and resource use strategy.…”

Section: Introductionmentioning

confidence: 99%

How do sink and source activities influence the reproduction and vegetative growth of spring ephemeral herbs under different light conditions?

Sunmonu

Kudo

2014

J Plant Res

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Spring ephemeral herbs inhabiting deciduous forests commonly complete reproduction and vegetative growth before canopy closure in early summer. Effects of shading by early canopy closure on reproductive output and vegetative growth, however, may vary depending on the seasonal allocation patterns of photosynthetic products between current reproduction and storage for future growth in each species. To clarify the effects of sink-source balance on seed production and bulb growth in a spring ephemeral herb, Gagea lutea, we performed a bract removal treatment (source reduction) and a floral-bud removal treatment (sink reduction) under canopy and open conditions. Leaf carbon fixations did not differ between the forest and open sites and among treatments. Bract carbon fixations were also similar between sites but tended to decrease when floral buds were removed. Seed production was higher under open condition but decreased by the bract-removal treatment under both light conditions. In contrast, bulb growth was independent of light conditions and the bract-removal treatment but increased greatly by the bud-removal treatment. Therefore, leaves and bracts acted as specialized source organs for vegetative and reproductive functions, respectively, but photosynthetic products by bracts were flexibly used for bulb growth when plants failed to set fruits. Extension of bright period was advantageous for seed production (i.e., source limited) but not for vegetative growth (i.e., sink limited) in this species.

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“…Life history theory predicts the existence of various trade-offs associated with reproductive traits. The amount of resources that can be invested either for sexual or for vegetative reproduction is limited, and thus a trade-off between the two modes of reproduction may be expected (SCH~TER & GADGIL 1975, WATSON 1984, SUTHERLAND • VICKERY 1988. Essential life history traits are affected, depending on how this trade-off is resolved.…”

Section: Introductionmentioning

confidence: 99%

Differences in life history traits of relatedEpilobium species: Clonality, seed size and seed number

Stöcklin

1999

Folia Geobot

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Small changes in morphology can affect the performance and functions of organisms and hence their ecological success. In modular constructed plants, contrasting growth strategies may be realized by differences in the spatial arrangement and size of shoots. Such differences change the way in which meristems and resources are assigned to various functions during the lifespan of a plant. If such changes include the capacity to spread clonally, sexual reproduction may also be affected. I compare patterns in vegetative growth and sexual reproductive traits in four allopatric species of Epilobium which are sometimes considered as subspecies of a single polymorphic taxon. The four species differ in the location of the buds which annually renew the aerial shoot system. E. dodonaei and E. steveni do not spread clonally and are characterized by a shrub-like habit. E. fleischeri, a species occurring only in the Alps, and E. colchicum, which occurs in the upper region of the Caucasus mountains, both produce buds on horizontal roots or plagiotropic shoots. Both alpine species exhibiting clonal growth have smaller shoots, fewer fruits and smaller seeds than the lowland species. An intraspecific trade-off between seed number per fruit and seed mass is realized. Both alpine species produce more seeds per fruit at the expense of seed mass. The morphological relationship between the four species and their geographical distribution suggest that clonal growth in E. fleischeri (restricted to the Alps) and E. colchicum (restricted to the Caucasus) is adaptively associated with the stressful conditions of alpine habitats. Our results suggest that clonal growth is not necessarily correlated with reduced reproduction by seeds. The success of plants which are already established may largely depend on clonal spread, but the colonization of new habitats depends on the production of a large number of small seeds with high dispersability.

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Developmental Constraints: Effect on Population Growth and Patterns of Resource Allocation in a Clonal Plant

Cited by 227 publications

References 39 publications

On two methods to estimate production of Eichhornia crassipes in the eutrophic Pampulha reservoir (MG, Brazil)

On two methods to estimate production of Eichhornia crassipes in the eutrophic Pampulha reservoir (MG, Brazil)

How do sink and source activities influence the reproduction and vegetative growth of spring ephemeral herbs under different light conditions?

Differences in life history traits of relatedEpilobium species: Clonality, seed size and seed number

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