Populus is an important model organism in forest biology, but levels of nucleotide polymorphisms and linkage disequilibrium have never been investigated in natural populations. Here I present a study on levels of nucleotide polymorphism, haplotype structure, and population subdivision in five nuclear genes in the European aspen Populus tremula. Results show substantial levels of genetic variati...

The cambial K+ content of poplar increases during the growth period in a K+ supply dependent manner. Upon K+ starvation or application of tetraethylammoniumchloride (TEA+), a K+ channel blocker, the average vessel lumen and expansion zone area were significantly reduced. In search for the molecular basis of potassium-dependent xylogenesis in poplar, K+ transporters homologous to those of known ...

Streszczenie W pracy przedstawiono nowe stanowiska 18 rzadkich (lub regionalnie rzadkich) roślin naczyniowych w Polsce (rodzimych i obcych), tj. Allium victorialis , Asclepias syriaca Carex brizoides Cephalanthera rubra Cypripedium calceolus Eragrostis albensis Erysimum pieninicum Gentiana cruciata Lepidium coronopus L. latifolium Limosella aquatica Lycopodiella inundata Orobanche centaurina O....

In reviewing of Poaceae family specimens in "IRAN" Herbarium, Urochloa panicoides belonging to Paniceae tribe and Eragrostis cilianensis (All.) Vign.-Lut. ex Janchen subsp. starosselskyi (Grossh.) Tzvelev to Eragrostideae tribe are reported as new to Iran. The first taxon is a corn field weed in Fars province and the second is rare plant from W. Azerbaijan province.

Populus species with wide geographic ranges display strong adaptation to local environments. We studied the clinal patterns in phenology and ecophysiology in allopatric Populus species adapted to similar environments on different continents under common garden settings. As a result of climatic adaptation, both Populus tremula L. and Populus balsamifera L. display latitudinal clines in photosynt...

The purpose of this work is to comparatively assess pollen viability five plant species growing in different areas the city Aktobe, Kazakhstan (N 50°18´, W 57°10´). Pollen was assessed through iodine staining on samples grains harvested between April and June 2017 from 100 plants 5 industrial zones, parks, along highways: Ulmus laevis Pall., pinnato-ramosa Dieck., Acer negundo L., Syringa vulga...