Flora of Turkey and the East Aegean Islands.

The seasonal cycle of respiratory viral diseases has been widely recognized for thousands of years, as annual epidemics of the common cold and influenza disease hit the human population like clockwork in the winter season in temperate regions. Moreover, epidemics caused by viruses such as severe acute respiratory syndrome coronavirus (SARS-CoV) and the newly emerging SARS-CoV-2 occur during the winter months. The mechanisms underlying the seasonal nature of respiratory viral infections have been examined and debated for many years. The two major contributing factors are the changes in environmental parameters and human behavior. Studies have revealed the effect of temperature and humidity on respiratory virus stability and transmission rates. More recent research highlights the importance of the environmental factors, especially temperature and humidity, in modulating host intrinsic, innate, and adaptive immune responses to viral infections in the respiratory tract. Here we review evidence of how outdoor and indoor climates are linked to the seasonality of viral respiratory infections. We further discuss determinants of host response in the seasonality of respiratory viruses by highlighting recent studies in the field. Expected final online publication date for the Annual Review of Virology, Volume 7 is September 29, 2020. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

https://www.annualreviews.org/doi/pdf/10.1146/annurev-virology-012420-022445

Seasonality of Respiratory Viral Infections.

Microencapsulation of microbial cells

Analysis of Binary Data.

Molecular Evolution: A Phylogenetic Approach.—Roderic D. M. Page and Edward C. Holmes.

Multiple shoots were induced from nodal segments of mature trees of Pistacia vera L. on Murashige and Skoog (MS) medium supplemented with benzylaminopurine (BA). Maximum shoot production was obtained from shoot tips taken from in vitro proliferated shoots when cultured on solidified MS medium containing 8.8 μ MB A. The multiplication rate was 20 microshoots per explant on the 30th day. Rooting of microshoots was achieved in MS medium supplemented with indole butyric acid (IBA). Rooted plantlets reassumed independent growth after a short period of acclimatisation. Stable regenerated plants were established in the greenhouse.

Micropropagation of Pistachio from mature trees

The success of various in vitro micrografting methods of shoot tips of pistachio (Pistacia vera L. var. Siirt) have been examined. Excised zygotic embryos that germinated in vitro were used as rootstocks. Current year shoot tips from mature trees of pistachio micrografted onto in vitro juvenile rootstocks, resulted in the restoration of shoot-bud proliferation. Variables tested include a size of microscion, grafting method, effects of culture medium and effects of time of the year at which shoot tips were used. The results indicate that the easiest and most successful method for grafting was slit micrografting. High levels of micrograft take were achieved with 2–4 mm (56.75%) and 4–6 mm (79.25%) long scions obtained from the regenerated shoot tips. The survival rate of the shoot tips was directly related to time of the year. The best growth of microscion was obtained with the in vitro forced shoot tips rather than with shoot tips excised from tree. Slow growth and lack of axillary shoot development on the micrografts was noticeable when the micrografts were cultured on hormone-free and germination medium. In vitro micrografted plantlets were successfully weaned and no problems were encountered with the establishment of micrografted plants in vivo.

In vitro Micrografting of Mature Pistachio ( Pistacia vera var. Siirt)

COVID-19 has been the most devastating pandemic in human history Despite the highest scientific efforts and investments, a reliable and certified medication has yet to be developed regarding to immune or cure this virus However, while synthetic medications are gaining the focus of attentions, it appears from a significant number of recent studies that plant-based substances could also be potential candidates for developing effective and secure remedies against this novel disease Citing such recent works, this review primarily demonstrates the antiviral potentials of medicinal plants for inhibiting human coronaviruses It also shows the importance of antiviral plants substances, particularly in the development of a broad spectrum medication for coronaviruses including SARS-CoV-2 responsible for COVID-19

Potentials of plant-based substance to inhabit and probable cure for the covid-19

Although several studies have been reported on the micropropagation of the pistachio and its rootstocks, to date none of them had been efficient on the mass production of these plants in bioreactor systems. Thus, the micropropagation of juvenile pistachio shoot tips and nodal buds was investigated in a temporary immersion bioreactor system (RITA®) and on a conventional semi-solid medium. Among the tested immersion conditions, immersion for 24 min every 16 h reduced vitrification and improved proliferation in the pistachio. Interactions were evident in immersion time and frequency in nodal segments. Nodal buds were better than shoot tips as the highest multiple shoot formation was recorded in MS medium containing 4 mg L−1 BA and 0.1 mg L−1 GA3 in RITA®. Although shoot tip necrosis (STN) was observed in shoots proliferated on semi-solid MS medium, such a symptom did not occur in shoots sprouted in the RITA®. Additionally, these optimized conditions were applied to nodal buds of mature male pistachio ‘Atli’ and Pistacia rootstocks (P. khinjuk Stocks and P. atlantica Desf.), and the micropropagation in the bioreactor system, in comparison to the semi-solid medium, was also improved. Furthermore, in vitro rooting of pistachio plantlets, despite the lower range (27.5 %), was also achieved in RITA®. However, rooting was better on semi-solid medium for all tested species (ranged between 50 and 70 %). The results of this study showed that RITA® could be used for the mass propagation of pistachio and its rootstocks, as well as for other woody plant species.

Micropropagation of the pistachio and its rootstocks by temporary immersion system

Pieces of an embryogenic mass (EMS) induced in culture from immature fruits of pistachio, Pistacia vera L., were encapsulated into calcium alginate beads. Somatic embryos were also encapsulated individually into calcium alginate beads to produce synthetic seeds. The viability of the encapsulated EMS and somatic embryos was investigated immediately following encapsulation, and after storage for 60 days at 4°C. The encapsulated-stored EMS fragments recovered their original proliferative capacity after two months storage following two sub-cultures, but non-encapsulated-stored EMS failed to recover. The conversion frequency of synthetic seeds to seedling plants was 14% after storage for 60 days at 4°C, from which it may be concluded that encapsulation is a practical procedure for short-term storage of embryogenic pistachio tissue, and may be applicable to the preservation of desirable elite genotypes.

Ahmet Onay

Papers

Micropropagation of Pistachio from mature trees

In vitro Micrografting of Mature Pistachio ( Pistacia vera var. Siirt)

Potentials of plant-based substance to inhabit and probable cure for the covid-19

Micropropagation of the pistachio and its rootstocks by temporary immersion system

Plant regeneration from encapsulated embryoids and an embryogenic mass of pistachio, Pistacia vera L.