نتایج جستجو برای: iranian native plants

تعداد نتایج: 332023  

Recent decades have witnessed the growing use of non-native plants in Iran while their use is very challenging and high-cost for the country. This raised a new approach in recent decades towards the use of native plants. Native species are precious because they possess the main ecological factors and they are already compatible with the region. Accordingly, this research was conducted to evalua...

Journal: :Ecology 2014
Susan C Cook-Patton Anurag A Agrawal

Although exotic plants comprise a substantial portion of floristic biodiversity, their contributions to community and ecosystem processes are not well understood. We manipulated plant species richness in old-field communities to compare the impacts of native vs. exotic species on plant biomass, seed production, and arthropod community structure. Plants within diverse communities, regardless of ...

Hojjat Sadeghi-Aliabadi, Marziyeh Khodamoradi Seyed Ebrahim Sajjadi

      It has been reported that different species of Euphorbia (Euphorbiaceae) have antitumor activity. Some reports also show that these plants have potential cytotoxic effect against different cell lines. In a program to screen the cytotoxicity of Iranian native plants, Euphorbia macroclada Boiss. was collected, identified, and the cytotoxic activity of dichloromethane, ethy...

Journal: :American journal of botany 2015
Carolyn M Beans Deborah A Roach

UNLABELLED • PREMISE OF STUDY Recent studies suggest that invasive plants compete reproductively with native plants by reducing the quantity or quality of pollinator visits. Although these studies have revealed ecological consequences of pollinator-mediated competition between invasive and native plants, the evolutionary outcomes of these interactions remain largely unexplored.• METHODS We ...

2012
Junmin Li Zexin Jin Wenjing Song

Field studies have shown that native, parasitic plants grow vigorously on invasive plants and can cause more damage to invasive plants than native plants. However, no empirical test has been conducted and the mechanism is still unknown. We conducted a completely randomized greenhouse experiment using 3 congeneric pairs of exotic, invasive and native, non-invasive herbaceous plant species to qua...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده ادبیات و علوم انسانی 1391

امروزه، این که زبان انگلیسی سریع ترین و گسترده ترین زبان مورد استفاده در سراسر جهان است به عنوان یک واقعیت پذیرفته شده است. استفاده مشترک از زبان انگلیسی به عنوان یک زبان بین المللی مستلزم هنجارها و مدل های یادگیری و تدریس زبان است. زبان شناسان توجه ویژه ای به مفهوم "زبان مادری" به عنوان تنها منبع درست و قابل اعتماد از داده های زبان می داده اند.با این حال، این اصطلاح به اندازه کافی روشن به نظر ...

2005
L ETTER John D. Parker Mark E. Hay

John D. Parker and Mark E. Hay* School of Biology, Georgia Institute of Technology, Atlanta, GA 30332–0230, USA *Correspondence: E-mail: [email protected] Abstract In contrast to expectations of the enemy release hypothesis, but consistent with the notion of biotic resistance, we found that native generalist crayfishes preferred exotic over native freshwater plants by a 3 : 1 ratio wh...

Mohammadsaeed Ahrarikhafi, Saghar Karimi Sina Salavati

Objective- The aim of this study was to evaluate ultrasonographic appearance of the normal eye and obtaining reference values of ocular structures in Iranian native donkey. Design- Experimental study. Animals- Five Iranian native donkeys. Procedures- After preparation of the animals, ocular structures were ima...

Journal: :iranian journal of pharmaceutical sciences 0
hojjat sadeghi-aliabadi department of pharmaceutical chemistry seyed ebrahim sajjadi department of pharmacognosy marziyeh khodamoradi isfahan pharmaceutical sciences research center, faculty of pharmacy, isfahan university of medical sciences, isfahan, iran

it has been reported that different species of euphorbia (euphorbiaceae) have antitumor activity. some reports also show that these plants have potential cytotoxic effect against different cell lines. in a program to screen the cytotoxicity of iranian native plants, euphorbia macroclada boiss. was collected, identified, and the cytotoxic activity of dichloromethane, ethylacetate, methanol extra...

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