Filters: Tags: Asteraceae (X)15 results (97ms)
Plant quality or quantity? Host exploitation strategies in three Chrysomelidae species associated with Asteraceae host plants
Turgor maintenance, solute content and recovery from water stress were examined in the drought-tolerant shrub Artemisia tridentata. Predawn water potentials of shrubs receiving supplemental water remained above ?2 MPa throughout summer, while predawn water potentials of untreated shrubs decreased to ?5 MPa. Osmotic potentials decreased in conjunction with water potentials maintaining turgor pressures above 0 MPa. The decreases in osmotic potentials were not the result of osmotic adjustment (i.e. solute accumulation). Leaf solute contents decreased during drought, but leaf water volumes decreased more than 75% from spring to summer, thereby passively concentrating solutes within the leaves. The maintenance of positive...
Interpreting variability among isolates of Macrophomina phaseolina in pathogenicity, pycnidium production, and chlorate utilization
Ecological studies of the endangered Rutidosis leptorrhynchoides. I. Seed production, soil seed bank dynamics, population density and their effects on recruitment
Insect herbivory on juveniles of a threatened plant, Cirsium pitcheri, in relation to plant size, density and distribution
Characteristics of Encelia species differing in leaf reflectance and transpiration rate under common garden conditions.
Nesting and Foraging Behavior of Andrena (Callandrena) rudbeckiae Robertson (Hymenoptera: Apoidea: Andrenidae) in Texas
Ecological studies of the endangered Rutidosis leptorrhynchoides. II. Patterns of seedling emergence and survival in a native grassland
Threatened species monitoring: Results of a 17-year survey of Pitcher's thistle, Cirsium pitcheri, in Pukaskwa National Park, Ontario
Germination Potential, Updated Population Surveys and Floral, Seed and Seedling Morphology of Symphyotrichum laurentianum, the Gulf of St. Lawrence Aster, in the Prince Edward Island National Park