In many biological fields (e.g. horticulture, forestry, botany), a need exists to quantify different types of variability within a set of plants. In this paper, we propose a method to compare plant individuals based on a detailed comparison of their architectures. The core of the method relies on an adaptation of an algorithm for comparing rooted tree graphs, recently proposed by Zhang in theor...

Polyporoid Phellinus fungi are ubiquitously present in the environment and play an important role in shaping forest ecology. Several species of Phellinus are notorious pathogens that can affect a broad variety of tree species in forest, plantation, orchard and urban habitats; however, current detection methods are overly complex and lack the sensitivity required to identify these pathogens at t...

We identified a dwarf transgenic hybrid poplar (Populus tremula x Populus alba) after screening of 627 independent activation-tagged transgenic lines in tissue culture, greenhouse, and field environments. The cause of the phenotype was a hyperactivated gene encoding GA 2-oxidase (GA2ox), the major gibberellin (GA) catabolic enzyme in plants. The mutation resulted from insertion of a strong tran...

In computer graphics, models describing the fractal branching structure of trees typically exploit the modularity of tree structures. The models are based on local production rules, which are applied iteratively and simultaneously to create a complex branching system. The objective is to generate three-dimensional scenes of often many realisticlooking and non-identical trees. Our goal, instead,...

Systemic neonicotinoid insecticides used in urban arboriculture could pose a risk to bees and other pollinators foraging on treated plants. We measured uptake and dissipation of soil-applied imidacloprid and dinotefuran in nectar and leaves of 2 woody plant species, a broadleaf evergreen tree (Ilex × attenuata) and a deciduous shrub (Clethra alnifolia), to assess concentrations to which pollina...

High-resolution pollen analysis of a sediment core recovered from Paliouras lagoon (Greece) allowed us to reconstruct the environmental dynamics Halkidiki peninsula during last 4000 years. Palynological results have been interpreted and compared with detailed historical data, showing distinct phases human-landscape interactions Bronze Age until recent times. Pollen spectra revealed an environme...

Land suitability maps are useful tools for protecting soil resources. The main objective of this study was to elaborate and assess different rainfed irrigated crops. This conducted in the North-East area Tunisia, three speculations were adopted (Cereals, arboriculture vegetable crops) both conditions. Arithmetic multiplication methods used based on Food Agriculture Organization (FAO) classifica...

Este trabalho tem como objetivo avaliar o grau de risco e propor medidas manejo para as árvores tipuanas, que compõe túnel verde da rua conhecida a ‘rua mais bonita do mundo’, em Porto Alegre, RS. Foram avaliados 26 indivíduos escolhidos aleatoriamente, através metodologia desenvolvida pela ISA – International Society of Arboriculture, é realizada uma avaliação não invasiva, mediante inspeção v...