Hypotheses for the Evolution of Apical Dominance in Plants: Implications for the Interpretation of Overcompensation

Aarssen, Lonnie W.

doi:10.2307/3545684

Cited by 194 publications

(153 citation statements)

References 36 publications

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“…We expected compensation for apical flower damage to result from an increase in branches or matured flowers, due to release from apical dominance restraints. Such compensation could additionally change plant phenology, aiding flower escape from herbivores in time (Aarssen 1995;Lehtilä 2000;Gruntman and Novoplansky 2011). Apical damage has led to compensation, and occasionally overcompensation, for herbivore damage in other systems.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

“…Undamaged apical heads produced 58-76% of total plant seed production on average. That sustained flower bud release after early apical damage enabled greater seed contributions from later heads with reduced herbivory suggests there may be a cost of apical dominance in lower herbivory environments (Aarssen 1995). A large investment in the apical head not only presumably mitigates the fitness costs of the high average risk of cumulative floral herbivory but also the inhibition of later flower heads by apical dominance.…”

Section: Interaction Between Apical Damage and Cumulative Herbivorymentioning

confidence: 99%

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Cumulative herbivory outpaces compensation for early floral damage on a monocarpic perennial thistle

West

Louda

2017

Oecologia

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Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Section: Interaction Between Apical Damage and Cumulative Herbivorymentioning

confidence: 99%

Cumulative herbivory outpaces compensation for early floral damage on a monocarpic perennial thistle

West

Louda

2017

Oecologia

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“…One mechanism by which plants may compensate for herbivory is through the release of apical dominance and the associated increase in growth from non-apical meristems (Bazely & Jefferies, 1989;Trumble et al, 1993;Aarssen, 1995;Watson, 1995). Thus, a significant feature of plantherbivore interactions is the influence of feeding on plant growth and architecture.…”

Section: Controlmentioning

confidence: 99%

“…), which resulted in a more prostrate growth pattern from increases in lateral rather than terminal branching (Whitham & Mopper, 1985). Herbivore-mediated architectural changes in tree form are predicted to lead to disadvantages in competition for light, attraction of pollinators, and seed dispersal (Whitham & Mopper, 1985;Aarssen, 1995).…”

Section: Controlmentioning

confidence: 99%

Herbivory alters resource allocation and compensation in the invasive tree Melaleuca quinquenervia

Pratt

Rayamajhi

Van

et al. 2005

Ecological Entomology

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Abstract. 1. Plants may compensate for the effects of herbivory, especially under favourable growing conditions, limited competition, and minimal topdown regulation. These conditions characterise many disturbed wetlands dominated by introduced plants, implying that exotic, invasive weeds in these systems should exhibit strong compensatory responses.2. The Australian native Melaleuca quinquenervia is highly invasive in the Florida Everglades, U.S.A., where it experiences limited competition or herbivory from native species, making it a likely candidate for compensation. The introduced biological control agent Oxyops vitiosa feeds exclusively on the seasonal flushes of developing foliage at branch apices, which represents &15% of the total foliar biomass.3. The hypothesis that M. quinquenervia compensates for folivory by O. vitiosa was tested in a series of field-based experiments. Trees experiencing folivory over four consecutive years maintained similar levels of foliar biomass after attack yet possessed twice the number of leaf-bearing terminal stems as undamaged trees. The biomass of these stems was similar among attacked and unattacked trees, indicating that herbivore-damaged trees produce greater quantities of smaller terminal branches. However, undamaged trees were 36 times more likely to reproduce than herbivore-damaged trees.4. In a separate herbivore exclusion study, a single bout of herbivory on previously undamaged M. quinquenervia trees caused an 80% reduction in reproductive structures the following season. Herbivore-damaged trees also possessed 54% fewer fruits than undamaged trees. An increase in the herbivory frequency (two bouts per year) or magnitude (100% simulated herbivory) did not result in a further reduction in fitness.5. It has been concluded that M. quinquenervia partially compensates for herbivory by producing new stems and replacing foliage, but this compensation results in a substantial reduction in reproduction.

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“…Apical dominance is "the preferential growth of a plant shoot (or root) from the apical or terminal meristem and the corresponding suppression of lateral subtending meristems and branches" (Aarssen 1994). Several authors have discussed the adaptive significance of apical dominance in plant shoots (Brown et al 1967, Little 1970, Cline 1991, Aarssen 1994).…”

Section: Apical Dominancementioning

confidence: 99%

Morphological indicators of growth response of coniferous advance regeneration to overstorey removal in the boreal forest

Ruel¹,

Messier²,

Doucet³

et al. 2000

The Forestry Chronicle

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Christian Messier2, Ren6 ~o u c e t~, Yves Claveau2 and Phil Comeau4Regeneration of forest stands through the preservation of existing advance regeneration has gained considerable interest in various regions of North America. The effectiveness of this approach relies on the capacity of regeneration to respond positively to overstory removal. Responses of advance regeneration to release is dependent on tree characteristics and site conditions interacting with the degree of physiological shock caused by the sudden change in environmental conditions. This paper presents a review of the literature describing the relationships between morphological indicators and the advance regeneration response to canopy removal. It focuses primarily on the following species: jack pine (Pinus banksiana Lamb.), lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.), black spruce (Picea mariana (Mill.) B.S.P.), interior spruce (Picea glauca x engelmannii), white spruce (Picea glauca (Moench) Voss), balsam fir (Abies balsamea (L.) Mill.), and subalpine fir (Abies lasiocarpa (Hook.) Nutt). Pre-release height growth has been found to be a good indicator of post-release response for many species. Live-crown ratio also appears to be a good indicator of vigour for shade-tolerant species. The ratio of leader length to length of the longest lateral at the last whorl could serve to describe the degree of suppression before harvest for shade-tolerant species. Number of nodal and internodal branches or buds has been found to be related with vigour for many species. Logging damage has been shown to be an important determinant of seedling response to overstory removal. In contrast, heighddiameter ratio has limited value for predicting response to release since it varies with site, species and other factors. No clear relationship between age, height at release and response to release could be demonstrated. This paper also suggests the use of combined indicators and cntical threshold values for these indicators.Key words: advance regeneration, careful logging, vigour, clearcutting I La protection de la rkgknkration prkttablie a fait l'objet d'un inter& croissant au cows des derniieres dtcennies en Amkrique du Nord. L'efficacitt de cette approche repose toutefois sur la capacit6 de cette rCgkn6ration B rkagir positivement h la coupe. La rkaction de la rkgtnkration prkktablie dkpend de ses caractkristiques au moment de la coupe et de leur interaction avec les conditions de station et le choc causk par le pr6lhement du couvert principal. Cet article passe en m e les relations entre diffkrents indicateurs morphologiques et la rkaction de la rkgknkration prkktablie aprks coupe. Les espkces vistes sont : le pin gris (Pinus banksiana Lamb.), le pin de Murray (Pinus contorta Dougl. var. latifolia Engelm.), l'tpinette noire (Picea mariana (Mill.) B.S.P.), l'kpinette blanche (Picea glauca (Moench) Voss), le sapin baurnier (Abies balsamea (L.) Mill.) et le sapin subalpin (Abies lasiocarpa (Hook.) Nutt). La croissance en hauteur avant coupe a kt6 relike...

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Hypotheses for the Evolution of Apical Dominance in Plants: Implications for the Interpretation of Overcompensation

Cited by 194 publications

References 36 publications

Cumulative herbivory outpaces compensation for early floral damage on a monocarpic perennial thistle

Cumulative herbivory outpaces compensation for early floral damage on a monocarpic perennial thistle

Herbivory alters resource allocation and compensation in the invasive tree Melaleuca quinquenervia

Morphological indicators of growth response of coniferous advance regeneration to overstorey removal in the boreal forest

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