Seed germination and invasion success of Poa annua L. in Antarctica

The soil seed bank and seed germination capacity of Poa annua in the vicinity of the Polish

Maciej Wódkiewicz* The soil seed bank and seed germination capacity of Poa annua in the vicinity of the Polish Halina Galera* Antarctic Station (South Shetlands, Antarctica) were investigated. It was documented that Katarzyna J. Chwedorzewska† annual bluegrass can reproduce sexually and produce a functional seed bank of close to Irena Giełwanowska‡ and 5000 seeds/m under maritime Antarctic cond...

Halophyte seed germination : success and pitfalls

Effects of carbon dioxide and nitrogen fertilization on phenolic content in Poa annua L.

Different but partially overlapping hypotheses have been developed to predict the allocation of phenolics in elevated atmospheric CO(2). The carbon-nutrient balance hypothesis predicts increased allocation to phenolics due to reduced relative availability of nitrogen. The growth-differentiation balance hypothesis states that allocation will depend on source and sink strength, while the protein ...

Opposing Actions of Light in Seed Germination of Poa pratensis and Amaranthus arenicola.

Action spectra were measured for suppression of germination of Poa pratensis L. and Amaranthus arenicola I. M. Johnston seed under prolonged or continuous irradiation. The action maxima for both types of seeds are near 720 nm. The maxima are unchanged in position or magnitude in the presence of radiation in the region of 600 to 670 nm adequate to maintain phytochrome predominantly in the far-re...

ec adoption and critical success factors of ec in smes in iran

تجارت الکترونیکی شیوه اجرای مسئولیتها، تقابل با مشتریان و امور معمول عملیاتی در شرکتها را تغییر داده است. تجارت الکترونیکی در عمل تنها خرید و فروش کالاها را از طریق ابزار الکترونیک نمی باشد، بلکه تمام فعالیتهای لازم جهت انجام فرایند فروش را نیز در بر میگیرد. در اواخر دهه 1990 بسیاری از شرکتها فعالیتهای خود را به منظور دستیابی به مشتریان جدید و یا ارائه فرصتهای جدید به مشتریان موجود گسترش دادند...