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7 results for “Plant biomechanics”
[DATASET 1] - BIOMECHANICAL CHARACTERIZATION OF SELECTED CLIMBING PLANTS
<p>In the framework of GrowBot project, Task 3.1 aims at selecting and investigating different climbing plants as models for GrowBot artefacts. The activities consist of biomechanical investigation and the analysis of plants’ functional strategies with respect to environmental complexity in terms of size, shape, density of supports, clutter and presence of voids.</p> <p>Task 3.3 aims at selecting and investigating different climbing plants’ attachment strategies for inspiring the design and development of artificial solutions.</p> <p>DS1 aims at collecting all the experimental data gathered during these activities.</p>
Biomechanical components of the plant-insect herbivore arms race: A model test in leaf-cutter ants
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Find the Food First: An Omnivorous Sensory Morphotype Predates Biomechanical Specialization for Plant Based Diets in Phyllostomid Bats
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Data from: Biomechanical and leaf-climate relationships: a comparison of ferns and seed plants
Premise of the study: Relationships of leaf size and shape (physiognomy) with climate have been well characterized for woody non-monocotyledonous angiosperms (dicots), allowing the development of models for estimating paleoclimate from fossil leaves. More recently, petiole width of seed plants has been shown to scale closely with leaf mass. By measuring petiole width and leaf area in fossils, leaf mass per area (MA) can be estimated and an approximate leaf life span inferred. However, little is known about these relationships in ferns, a clade with a deep fossil record and with the potential to greatly expand the applicability of these proxies. Methods: We measured the petiole width, MA, and leaf physiognomic characters of 179 fern species from 188 locations across six continents. We applied biomechanical models and assessed the relationship between leaf physiognomy and climate using correlational approaches. Key results: The scaling relationship between area-normalized petiole width and MA differs between fern fronds and pinnae. The scaling relationship is best modeled as an end-loaded cantilevered beam, which is different from the best-fit biomechanical model for seed plants. Fern leaf physiognomy is not influenced by climatic conditions. Conclusions: The cantilever beam model can be applied to fossil ferns. The lack of sensitivity of leaf physiognomy to climate in ferns argues against their use to reconstruct paleoclimate. Differences in climate sensitivity and biomechanical relationships between ferns and seed plants may be driven by differences in their hydraulic conductivity and/or their differing evolutionary histories of vein architecture and leaf morphology.
Data from: Climate warming and plant biomechanical defences: silicon addition contributes to herbivore suppression in a pasture grass
1. Plants, notably the Poacae, often accumulate large amounts of silicon (Si) from the soil. Si has multiple functional roles, particularly for alleviating abiotic and biotic stresses (e.g. defence against herbivores). Recent evidence suggests that environmental change, including temperature changes, can diminish Si accumulation which could affect functions such as herbivore defence. 2. Using a field warming experiment, we grew a pasture grass (Phalaris aquatica) that was either supplemented or untreated with Si (+Si and -Si, respectively) under ambient and elevated (+2.8ºC above ambient) air temperatures. We quantified soil water, plant growth rates, Si accumulation, leaf biomechanical properties and in situ relative growth rates of a herbivorous global insect pest (Helicoverpa armigera). 3. Si supplementation promoted shoot and root biomass by c. 48% and 61%, respectively under ambient temperatures, but these gains were not apparent under warmed conditions. 4. Warmer temperatures reduced Si uptake by -Si plants by c. 17%, potentially due to the lower levels of soil water content in warmed plots. Si supplementation, however, increased Si accumulation in leaves by c. 24% in warmed plots restoring Si levels to those seen under ambient temperatures. 5. Si supplementation enhanced biomechanical properties in the leaves, but this was only statistically significant under ambient temperatures; leaves of +Si plants required 42% more force to fracture and were 30% tougher at the midrib than leaves of -Si plants. The relative growth rates of H. armigera declined by 56% when feeding on +Si plants under ambient temperatures and while Si supplementation caused a trend towards declining herbivore growth rates under warmer conditions, this was not statistically significant. 6. We conclude that climate warming may mitigate the beneficial effects of Si on Phalaris aquatica in the short term, potentially by reducing Si uptake. While Si uptake can be restored with Si supplementation, Si-enhanced biomechanical defences against a global pest may not be fully restored under warmer temperatures.
Data from: Climate warming and plant biomechanical defences: silicon addition contributes to herbivore suppression in a pasture grass
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Data from: Biomechanical and leaf-climate relationships: a comparison of ferns and seed plants
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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