1. Intraguild predation occurs when top predators feed upon both intermediate predators and herbivores. Intraguild predators may thus have little net impact on herbivore abundance. Variation among communities in the strength of trophic cascades (the indirect effects of predators on plants) may be due to differing frequencies of intraguild predation. Less is known about the influence of variatio...

In this paper, we study the application of the box counting method (BCM) to estimate the fractal dimension of 3D plant foliage. We use artificial crowns with known theoretical fractal dimension to characterize the accuracy of the BCM and we extend the approach to 3D digitized plants. In particular, errors are experimentally characterized for the estimated values of the fractal dimension. Result...

The degree of 137 Cs root uptake into tropical fruits, vegetables and native foliage from coral atoll soils in the Marshall Islands has been quantified using soil-to-plant transfer factors. Transfer factor values for different plants on Bikini Island (Bikini Atoll) range between 0.2 and 144 and, in general, are considerably higher than those observed in continental soils. In this paper we will ...

Potato purple top (PPT) is an emerging potato disease complex. The etiological agents of PPT are phloem-inhabiting, cell wallless bacteria known as phytoplasmas. Tomato is an alternative host of these phytoplasmas. PPT phytoplasma-infected tomato plants exhibit symptoms including abnormal foliage development and formation of “big buds”. In the present study, twodimensional gel electrophoresis (...

ABSTRACT It is known that various plants have purification ability for indoor air pollutants. In this paper the purification mechanism of foliage plant was investigated by analyzing bioelectrical potential. It was first shown that the air purification ability of a plant depends on various environmental conditions, especially on light irradiation. It was then clarified that the bioelectrical pot...

Abstract. The article presents the original data on total Hg concentration in needles of different tree species and aspen foliage Tomsk Region. Mean concentrations were lower than Republic Sakha-Yakutiya but higher Southern Siberia. increased from southeast to northeast Cedar had sorption properties relative this metal, pine lowest ones. Aspen accumulated mercury better one growing season compa...

Biotin-binding proteins (BBPs), such as avidin and streptavidin, represent potent insect control compounds which could be delivered via transgenic plants. The effects of BBPs on some pasture pests were determined. Black field cricket nymphs (Teleogryllus commodus) had significantly reduced growth and survival when fed on lettuce leaves painted with purified avidin. Adult clover root weevils (Si...

The foliage of fifteen day-old Vigna radiata seedlings was sprayed with water (control) or with a 10–10 M, 10–8 M or 10–6 M aqueous solution of 28-homobrassinolide (HBR). Samples of the treated plant material, collected at 30/50 days after sowing (DAS), were assessed for the activities of carbonic anhydrase (CA) and nitrate reductase (NR); leaf chlorophyll content (Chl); stomatal conductance (g...