Clonal plant networks consist of interconnected individuals (ramets) of different sizes and ages. They represent heterogeneous ramet assemblages with marked differences in quality and attractiveness for herbivores. Here, feeding preferences of a generalist herbivore (Spodoptera exigua) for differently-aged ramets of Trifolium repens were studied, and changes in herbivore preference in response ...

Hooked apex stolons and initial swelling stolons of potato plants were treated with 3 x 10-8 mol l-1 jasmonic acid (JA) to study the effect of this compound on histology, cell expansion and tissue differentiation. In hooked apex stolons, JA application increased the meristem thickness and reduced the length of the leaf primordia, whereas in initial swelling stolons narrowing of the apical regio...

In many plants belonging to angiosperms and gymnosperms the accumulation in leaves of long chain polyprenols and polyprenyl esters during growth in natural habitats depends on the light intensity. The amount of polyprenols in leaves is also positively correlated with the thickness of the leaf blade (SLA, specific leaf area). The polyprenol content of leaves shows seasonal changes with a maximum...

Aim: The basic aim of this thesis was to disentangle phosphorus status-dependent and -independent effects of arbuscular mycorrhizal fungi (AMF, Glomus hoi) on the components of plant growth: morphology and assimilation rates, in perennial ryegrass (Lolium perenne L.). Materials & Methods: In a first experiment, I assessed phosphorus response functions of leaf and plant morphological components ...

This paper reports on the effect of seedling thickness stem height and leaf number oilseed sunflower. According to him, local Dilbar (st) variety compared foreign Buzuluk Rodnik varieties, when was set at 50, 60, 70,000 per hectare, plant superior in terms leaves, but seedlings increased 80,000, growth slowed down reached an average 226.4 cm. while is average, it determined that high, i.e. 234....

Optical parameters (absorption coefficient k, infinite reflectance Rinfinity, scattering coefficient 8) are tabulated for seven wavelengths and analyzed for statistical differences for 30 plant species. The wavelengths are: 550 nm (green reflectance peak), 650 nm (chlorophyll absorption band), 850 nm (infrared reflectance plateau), 1450 nm (water absorption band), 1650 nm (reflectance peak foll...

Diaprepes abbreviatus L. is a highly polyphagous root weevil that causes damage to several fruit crops, ornamental plants, and other naturally occurring plants in Florida. Haeckeliania sperata Pinto is a gregarious endoparasitoid that attacks D. abbreviatus eggs. We hypothesized that the reproductive success of H. sperata is affected by the host plant of D. abbreviatus. Six host plants with var...