Plastic Energy Allocation Patterns in Plantago Coronopus

Waite, Stephen; Hutchings, Michael J.

doi:10.2307/3544673

Cited by 60 publications

(21 citation statements)

References 22 publications

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“…(2008) found that RAs in all plant species declined after 2 years of fertilization [36], which is consistent with some observations that plants under crowded conditions can usually increase their competitive ability for light by allocating more resources to leaves and stems at the expense of RA [37], [38]. In contrast, we found that the final RA in A. cristatum remained unchanged across all treatments.…”

Section: Discussionsupporting

confidence: 91%

Hierarchical Reproductive Allocation and Allometry within a Perennial Bunchgrass after 11 Years of Nutrient Addition

et al. 2012

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Bunchgrasses are one of the most important plant functional groups in grassland ecosystems. Reproductive allocation (RA) for a bunchgrass is a hierarchical process; however, how bunchgrasses adjust their RAs along hierarchical levels in response to nutrient addition has never been addressed. Here, utilizing an 11-year nutrient addition experiment, we examined the patterns and variations in RA of Agropyron cristatum at the individual, tiller and spike levels. We evaluated the reproductive allometric relationship at each level by type II regression analysis to determine size-dependent and size-independent effects on plant RA variations. Our results indicate that the proportion of reproductive individuals in A. cristatum increased significantly after 11 years of nutrient addition. Adjustments in RA in A. cristatum were mainly occurred at the individual and tiller levels but not at the spike level. A size-dependent effect was a dominant mechanism underlying the changes in plant RA at both individual and tiller levels. Likewise, the distribution of plant size was markedly changed with large individuals increasing after nutrient addition. Tiller-level RA may be a limiting factor for the adjustment of RA in A. cristatum. To the best of our knowledge, this study is the first to examine plant responses in terms of reproductive allocation and allometry to nutrient enrichment within a bunchgrass population from a hierarchical view. Our findings have important implications for understanding the mechanisms underlying bunchgrass responses in RA to future eutrophication due to human activities. In addition, we developed a hierarchical analysis method for disentangling the mechanisms that lead to variation in RA for perennial bunchgrasses.

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Section: Discussionsupporting

confidence: 91%

Hierarchical Reproductive Allocation and Allometry within a Perennial Bunchgrass after 11 Years of Nutrient Addition

et al. 2012

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“…This suggests that, for these groups, investing more in competitive structures was preferred to reproduction. Indeed, researchers such as Waite and Hutchings (1982) have shown that, under unfavorable conditions, plants may invest more in resource-acquiring structures in lieu of reproduction.…”

Section: Discussionmentioning

confidence: 99%

Evidence of Phenotypic Plasticity in the Response of Fagopyrum esculentum to Population Density and Sowing Date

et al. 2009

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Phenotypic plasticity is an important attribute that enables plants to survive across a range of environments. We conducted two experiments to investigate the plasticity of architectural traits and biomass ratios for Fagopyrum esculentum Moench in response to population density and sowing date. These included (1) inter-planting distances of 5, 10, 15, or 20 cm; and (2) sowing on 25 July, 1 August, 5 August, or 10 August. Many traits exhibited phenotypic plasticity that was coupled with changes in plant size. However, variations in leaf/mass ratio from either experiment, as well as leaf/root ratios in response to sowing date, were independent of size. When coefficients of variation were computed, some consistency was found in the magnitude of trait plasticity for both density and sowing date. For each experiment, leaf/root ratios, leaf/mass ratios, and stem/mass ratios were most plastic. Although this suggests that biomass ratios could be more responsive to environmental changes, a wide array of traits should be considered if we are to fully understand the mechanism for these phenomena.

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“…L'ensemble des rCsultats obtenus au niveau des pousses annuelles reioint des observations effectuCes Dar d'autres auteurs au niveau des individus chez des especes pCrennes (Ogden 1974;Hickman 1975;Weaver et Cavers 1980;Waite et Hutchings 1982;Samson et Werk 1986;Fenner 1986;Herndon 1987). Les pousses du hitre prCsentent donc des comportements individuels et cette similitude avec des individus souligne bien leur semi-autonomie.…”

Section: Discussionunclassified

Répartition de la matière sèche entre les organes végétatifs et reproducteurs dans les pousses annuelles du hêtre européen (Fagus sylvatica)

Thiébaut¹,

Comps²

1991

Can. J. Bot.

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Requ le 8 juin 1990 THIEBAUT, B., et COMPS, B. 1991. RCpartition de la matiere stche entre les organes vCgCtatifs et reproducteurs dans les pousses annuelles du hCtre europCen (Fagus sylvatica). Can. J. Bot. 69 : 2225-2231. Les allocations de ressources chez les vCgCtaux peuvent Ctre estimCes pour Ctudier la repartition de la biomasse entre differents organes lors d'un cycle de vegetation. Six hCtres europCens (Fagus sylvatica L.) isolCs de mCme ige ont CtC choisis dans une station aux conditions Ccologiques homogenes : 229 pousses annuelles situCes sur des axes de premier ordre Cquivalents dans la ramification ont Ct C analysees pour dCcrire la repartition de la matiere skche entre les feuilles et les stipules (pour la maintenance), l'axe (pour la croissance actuelle), les bourgeons (pour la croissance future), les infrutescences (pour la reproduction femelle) et les inflorescences miles (pour la reproduction mile). Une discussion est engagte sur la distinction entre acquisitions et allocations qui traduisent deux rCalitCs distinctes mais complCmentaires. Les stratCgies de dCveloppement sont diffkrentes entre les pousses vCgCtatives longues et celles qui sont courtes : les premieres privilkgient la croissance pour explorer le milieu, et les secondes la maintenance pour l'exploiter. Lorsque ces deux types de pousses disposent d'un apport supplCmentaire de ressources et acquierent la sexualitC, ces nouvelles acquisitions bCnCficient ? i la fois aux fonctions vtgCtatives et reproductrices dans les pousses courtes, alors qu'une competition se dessine entre ces fonctions dans les pousses longues.Mots clis : allocations de ressources, matibre stche, pousses annuelles, hCtre europCen, Fagus sylvatica.THIEBAUT, B., and COMPS, B. 1991. RCpartition de la matiere seche entre les organes vCgCtatifs et reproducteurs dans les pousses annuelles du hCtre europCen (Fagus sylvatica). Can. J. Bot. 69: 2225-2231. Resource allocations in plants can be estimated to study biomass distribution in the various organs during a vegetative cycle. Six isolated Europeen beech trees (Fagus sylvatica L.) of the same age were chosen within a station characterized by homogeneous ecological conditions: 229 annual shoots located on equivalent first order axes in the ramification were analysed to describe the distribution of dry material in leaves and stipules (for maintenance), in the axis (for present growth), in buds (for future growth), in infructescences (for female reproduction), and in male inflorescences (for male reproduction). The discrimination between acquisitions and allocations, which correspond to two different but complementary realities, is discussed. Development strategies are different between long and short vegetative shoots; the first one favours growth to explore the environment while the latter favours the maintenance to exploit it. When these two kinds of shoots flower and have additional resources, these new acquisitions are profitable both to vegetative and reproductive functions in short shoots, whereas a competition occur...

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Plastic Energy Allocation Patterns in Plantago Coronopus

Cited by 60 publications

References 22 publications

Hierarchical Reproductive Allocation and Allometry within a Perennial Bunchgrass after 11 Years of Nutrient Addition

Hierarchical Reproductive Allocation and Allometry within a Perennial Bunchgrass after 11 Years of Nutrient Addition

Evidence of Phenotypic Plasticity in the Response of Fagopyrum esculentum to Population Density and Sowing Date

Répartition de la matière sèche entre les organes végétatifs et reproducteurs dans les pousses annuelles du hêtre européen (Fagus sylvatica)

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