Facing herbivory on the climb up: Lost opportunities as the main cost of herbivory in the wild yam Dioscorea praehensilis

Autor: Doyle McKey, Edmond Dounias, Bruno Di Giusto
Přispěvatelé: Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE)
Jazyk: angličtina
Rok vydání: 2017
Předmět:
0106 biological sciences
Canopy
plant architecture
Perennial plant
Growth phase
[SDE.MCG]Environmental Sciences/Global Changes
[SHS.ANTHRO-BIO]Humanities and Social Sciences/Biological anthropology
Biology
010603 evolutionary biology
01 natural sciences
Monocotyledon
Botany
Ecology
Evolution
Behavior and Systematics
ComputingMilieux_MISCELLANEOUS
monocotyledon
Nature and Landscape Conservation
Original Research
perennial
Herbivore
Tree canopy
Ecology
resource storage
plantherbivore
fungi
food and beverages
15. Life on land
interactions
[SHS.ANTHRO-SE]Humanities and Social Sciences/Social Anthropology and ethnology
[SDE.ES]Environmental Sciences/Environmental and Society
Agronomy
[SHS.ENVIR]Humanities and Social Sciences/Environmental studies
Dioscorea praehensilis
plant/herbivore interactions
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Plant tolerance to herbivory
010606 plant biology & botany
Zdroj: Ecology and Evolution
Ecology and Evolution, Wiley Open Access, 2017, 7 (16), pp.6493-6506. ⟨10.1002/ece3.3066⟩
Ecology and Evolution, 2017, 7 (16), pp.6493-6506. ⟨10.1002/ece3.3066⟩
ISSN: 2045-7758
DOI: 10.1002/ece3.3066⟩
Popis: Plants with simple architecture and strong constraints on their growth may offer critical insights into how growth strategies affect the tolerance of plants to herbivory. Although Dioscorea praehensilis, a wild yam of African forests, is perennial, both aerial apparatus and tuber are annually renewed. Each year, the tuber produces a single stem that climbs from the ground to the forest canopy. This stem bears no leaves and no branches until it reaches optimal light conditions. Once in the canopy, the plant's production fuels the filling of a new tuber before the plant dies back to the ground. We hypothesized that if deprived of ant defense, the leafless growth phase is a vulnerable part of the cycle, during which a small amount of herbivory entails a high cost in terms of loss of opportunity. We compared the growth of stems bearing ants or not as well as of intact stems and stems subjected to simulated or natural herbivory. Ants reduce herbivory; herbivory delays arrival to the canopy and shortens the season of production. Artificially prolonging the stem growth to the canopy increased plant mortality in the following year and, in surviving plants, reduced the stem diameter and likely the underground reserves produced. Tuber size is a key variable in plant performance as it affects both the size of the aerial apparatus and the duration of its single season of production. Aerial apparatus and tuber are thus locked into a cycle of reciprocal annual renewal. Costs due to loss of opportunity may play a major role in plant tolerance to herbivory, especially when architectural constraints interact with ecological conditions to shape the plant's growth strategy.
Databáze: OpenAIRE
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