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Mechanisms of Alignment in Feeding Aphids on the Plant Stem.
Ecol Evol
January 2025
Department of Biology, Graduate School of Sciences and Technology for Innovation Yamaguchi University Yamaguchi Japan.
Aphids are observed on various plant species, with most aphids feeding downward on stems. In this study, I studied the variations in feeding postures of aphids and their mechanisms. My field observations revealed that the majority of individuals from most species fed facing downward, or more precisely, towards the roots.
View Article and Find Full Text PDFKinetics of vapor-liquid and vapor-solid phase separation under gravity.
Soft Matter
January 2025
Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India.
We study the kinetics of vapor-liquid and vapor-solid phase separation of a hydrodynamics preserving three-dimensional one-component Lennard Jones system in the presence of an external gravitational field using extensive molecular dynamic simulation. A bicontinuous domain structure is formed when the homogeneous system near the critical density is quenched inside the coexistence region. In the absence of gravity, the domain morphology is statistically self-similar and the length scale grows as per the existing laws.
View Article and Find Full Text PDFVariation of physical wood properties and effect of dasometric variables in trees growing in plantation.
Heliyon
January 2025
Escuela de Ingeniería Forestal, Instituto Tecnológico de Costa Rica, Apartado, 159-7050, Cartago, Costa Rica.
Physical properties were studied in commercial plantation of balsa established in Costa Rica. Among other variables studied, physical properties varied mainly for tree age, spacing, stand density, diameter, and height of trees, which we named dasometric conditions. The aim of this study was (i) to determine the variation of specific gravity (SG), air-dry density (AD), green density (GD), and green moisture content (GMC), (ii) to know the site effect and dasometric conditions on these properties, and (iii) to establish the relationship between the four physical properties.
View Article and Find Full Text PDFPlants will form the basis of artificial ecosystems in space exploration and the creation of bases on other planets. Astrophysical factors, such as ionizing radiation (IR), magnetic fields (MF) and gravity, can significantly affect the growth and development of plants beyond Earth. However, to date, the ways in which these factors influence plants remain largely unexplored.
View Article and Find Full Text PDFCombined Effects of Microgravity and Chronic Low-Dose Gamma Radiation on Microgreens.
Plants (Basel)
December 2024
Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy.
Plants in space face unique challenges, including chronic ionizing radiation and reduced gravity, which affect their growth and functionality. Understanding these impacts is essential to determine the cultivation conditions and protective shielding needs in future space greenhouses. While certain doses of ionizing radiation may enhance crop yield and quality, providing "functional food" rich in bioactive compounds, to support astronaut health, the combined effects of radiation and reduced gravity are still unclear, with potential additive, synergistic, or antagonistic interactions.
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