چکیده مرحله اپی فیتی باکتری pseudomonas syringae pv. syringae (pss) در شیوع و انتشار آن نقش اساسی دارد. این تحقیق با هدف تعیین جمعیت اپی فیتی باکتری pss روی تعدادی از علف های هرز باغات زردآلوی آلوده به بیماری شانکر باکتریایی در منطقه مرند انجام گرفت. در ماه های مهر و آبان از علف های هرز موجود نظیر پنیرک، تاج خروس، گل قاصد، پیچک، سلمه، قیاق و مرغ نمونه برداری شد. رقت های مختلف تا 7-10 از سوسپانس...

Rhizobia are well-known for their ability to infect and nodulate legume roots, forming a nitrogen-fixing symbiosis of agricultural importance. In addition, recent studies have shown that rhizobia can colonize roots and aerial plant tissues of rice as a model plant of the Graminaceae family. Here we show that rhizobia can invade tobacco, a model plant belonging to the Solanaceae family. Inoculat...

the present study describes the encapsulation of protocorm of cymbidium bicolor lindl. from 60 days-old in seed cultures for short- term conservation and propagation. various concentrations and combinations of gelling matrix (sodium alginate) and complexing agents (calcium chloride) were tested to prepare uniform beads. the ideal beads were ob- tained through a combination of 3% sodium alginate...

Abstract Purpose To study the structure of epiphytic bacterial community male and female Porphyra haitanensis , in order to explore similarities differences between dioecious macroalgae . Methods Collection from intertidal zone Niushan Island, Fujian, China. Epiphytic bacteria were collected studied, composition diversity explored using high-throughput sequencing technology. Results There was n...

For a long time, agriculture and recurrent fires have been the main factors promoting diversity changes in Mediterranean areas. We examined the effect of irrigated and non-irrigated crops and fires on the epiphytic lichen diversity of holm oak trees in the Vall d’Albaida region (Valencia, Spain). Lichen diversity was studied by calculating the LDV (Lichen Diversity Value) and the proportion of ...

_________________________________________ Epiphytic lichen communities are included in the national Forest Health Monitoring (FHM) program because they help us assess resource contamination, biodiversity, and sustainability in the context of forest health. In 1996, field crews collected lichen samples on 141 field plots systematically located across all forest ownership groups in Idaho. Results...

The study presents data on the condition of thalli epiphytic lichens, their occurrence and projective cover sample plots located in area outbreak Ips sexdentatus Boern Maly Abakan site Khakassky Nature Reserve.

In this study, the epiphytic algae of Lemna minor collected from its natural habitat or grown in aquarium were analyzed for a period of six months from April 2016 to September 2016. While a total of 15 taxa, 1 belonging to Cyanophyta and 14 belonging to Bacillariophyta, were recorded for L. minor grown in aquarium, a total of 36 taxa, 3 belonging to Cyanophyta, 5 belonging to Chlorophyta, 1 bel...

40 With increasing atmospheric CO2 concentrations, the oceans are expected to increase in acidity during the next century. Increasing ocean acidity has been shown to negatively affect many marine ecosystems, particularly calcifying organisms. We investigated acidification effects on the turtle grass communities of Little Cayman Island, British West Indies (BWI). We hypothesized that acidified s...