zinc (zn) and copper (cu) are essential elements and increased plant growth in low concentrations. while high concentrations of these elements as a limiting factor, can cause adverse symptoms on the plants. in the present study, the uptake of micronutrient and macronutrient by pennyroyal were studied in a zn and cu deficiency and toxicity in soil. three levels of copper (0, 5 and 25 mg/kg) and ...

Plant demographic studies coupled with population modeling are crucial components of invasive plant management because they inform managers when in a plant's life cycle it is most susceptible to control efforts. Providing land managers with appropriate data can be especially challenging when there is limited data on potentially important transitions that occur belowground. For 2 years, we monit...

BACKGROUND AND AIMS Masting, i.e. synchronous but highly variable interannual seed production, is a strong sink for carbon and nutrients. It may, therefore, compete with vegetative growth. It is currently unknown whether increased atmospheric CO(2) concentrations will affect the carbon balance (or that of other nutrients) between reproduction and vegetative growth of forest species. In this stu...

The sequence of histogenesis and organogenesis in the calus of Hyssopus officinalis nodal explants was studied during treatment with growth regulators. This process represents an important indicator of the accommodation capacity of regenerated plantlets to the ex vitro conditions. The cell multiplication rate was stimulated in Murashige and Skoog medium supplemented with indole-3-butyric acid (...

Abstract Although golden currant has been grown in Latvia for several decades, mainly as ornamental plant, there is little experience on the most suitable cultivation systems berry production. Two cultivars of — ‘Laila’ and ‘Uzbekistanskaya Krupnoplodnaya’, were planted 2017 two vertical trellis shrub form assessed first seasons with harvest. In addition, plots without organic mulch established...

We address the estimation of Markov (and semi-Markov) switching linear mixed models i.e. models that combine linear mixed models with individualwise random effects in a (semi-)Markovian manner. A MCEM-like algorithm whose iterations decompose into three steps (sampling of state sequences given random effects, prediction of random effects given the state sequence and maximization) is proposed. T...

An efficient procedure for in vitro shoot production of the medicinal plant sundew (Drosera rotundifolia L.) was developed. Of three cytokinins tested, zeatin (ZEA) at a concentration of 2 μM resulted in the formation of large numbers of adventitious shoots on leaf explants. A larger size of the small shoots was achieved by combining a 2-weeks preculture with ZEA (step 1: shoot induction) with ...