نتایج جستجو برای: juniperus excelsa

تعداد نتایج: 3036  

Journal: :South-east European forestry 2023

Trees' height (H) and diameter (D) growth depend on many factors vary between species. This study examined H D of Juniperus excelsa, J. foetidissima, Pinus nigra, Quercus cerris Q. pubescens, growing naturally in the Central Anatolian forest steppe site conditions (human impact, woody plant coverage, tree density, altitude, exposure) that influence growth. The present hypothesises decline might...

2007
Robert P. Adams Julie A. Morris

Recent nrDNA and trnC-trnD sequence data revealed that J. monticola and J. m. f. compacta are not monophyletic, and this prompted additional research using Single Nucleotide Polymorphisms (SNPs). The SNPs data clearly show that J. monticola f. compacta is not conspecific with J. monticola f. monticola. Juniperus monticola f. compacta Mart. is raised to the specific level as: Juniperus compacta ...

2012
Marta H. Taniwaki John I. Pitt Beatriz T. Iamanaka Daniele Sartori Marina V. Copetti Arun Balajee Maria Helena P. Fungaro Jens C. Frisvad

During a study on the mycobiota of brazil nuts (Bertholletia excelsa) in Brazil, a new Aspergillus species, A. bertholletius, was found, and is described here. A polyphasic approach was applied using morphological characters, extrolite data as well as partial β-tubulin, calmodulin and ITS sequences to characterize this taxon. A. bertholletius is represented by nineteen isolates from samples of ...

2018
Caleb P. Roberts Daniel R. Uden Craig R. Allen Dirac Twidwell

Mismatches between invasive species management policies and ecological knowledge can lead to profound societal consequences. For this reason, natural resource agencies have adopted the scientifically-based density-impact invasive species curve to guide invasive species management. We use the density-impact model to evaluate how well management policies for a native invader (Juniperus virginiana...

2011
Joy K. Ward Laci M. Gerhart John M. Harris Jesse B. Nippert Darren R. Sandquist

• While studies of modern plants indicate negative responses to low [CO2] that occurred during the last glacial period, studies with glacial plant material that incorporate evolutionary responses are rare. In this study, physiological responses to changing [CO2] were compared between glacial (La Brea tar pits) and modern Juniperus trees from southern California. • Carbon isotopes were measured ...

Journal: :FEMS microbiology ecology 2015
Francisco Lloret Stefania Mattana Jorge Curiel Yuste

This study reports the relationship between the diversity and functioning of fungal and bacterial soil communities with vegetation in Mediterranean woodland that experienced severe die-off after a drought episode. Terminal restriction fragment length polymorfism (TRFLP) was used to describe microbial community structure and diversity five years after the episode in different habitats (Juniperus...

Journal: :The New phytologist 2010
Kangshan Mao Gang Hao Jianquan Liu Robert P Adams Richard I Milne

• A central aim of biogeography is to understand when and how modern patterns of species diversity and distribution developed. Many plant groups have disjunct distributions within the Northern Hemisphere, but among these very few have been studied that prefer warm semi-arid habitats. • Here we examine the biogeography and diversification history of Juniperus, which occurs in semi-arid habitats ...

Aazam Monfared Maryam Esmaili, Mohammad Akbarzadeh

Juniperus sabina L. is normally low shrub with procumbent or obliquely ascending branches, or rarely a small tree to about 4 m, monoecious or dioecious. Juniperus sabina L. is a medicinal plant used in folk medicine as an abortive. Its lignanes  have antineoplastic and antiviral activity, and also essential oil of Juniperus sabina L. has shown antibacterial a...

ژورنال: :زیست شناسی ایران 0

تغییرات تنوع فلور چوبی در رابطه با عوامل محیطی (ارتفاع از سطح دریا، جهت دامنه و شیب) در مساحت حدود 3000 هکتار از رویشگاه ارس (juniperus excelsa) کوههای هزار مسجد خراسان رضوی مورد مطالعه قرار گرفت. در مجموع، در 130 قطعه نمونه 10 آری انتخاب شده، 16 گونه چوبی متعلق به 9 خانواده شناسایی شد. شیب دامنه روی شاخص غنای منهینیک (442/0 p=) و یکنواختی پایلو (220/0 p=) گونه های چوبی تأثیر نداشت، اما تأثیر آ...

ژورنال: :علوم محیطی 0
اعظم سادات نوری دانشگاه شهید باهنر خسرو منوچهری کلانتری دانشگاه شهید باهنر مظفر شریفی دانشگاه تربیت مدرس فرزین ناصری ﻣﺮﮐﺰ ﺑﯿﻦ اﻟﻤﻠﻠﯽ ﻋﻠﻮم و ﺗﮑﻨﻮﻟﻮژی ﭘﯿﺸﺮﻓﺘﻪ و ﻋﻠﻮم ﻣﺤﯿﻄﯽ عباس طاهرنژاد دانشگاه شهید باهنر

همزیستی گیاهان با میکروارگانیسم ها و سایر موجودات زنده موجب حفظ و پایداری گونه های گیاهی و حفظ جوامع گیاهی می گردد. میکوریز یکی از سودمندترین همزیستی ها می باشد که در آن گیاه میزبان و قارچهای همزیست بطور متقابل فایده می برند. تنوع قارچهای همزیست و روابط پیچیده بین جوامع گیاهی با جوامع قارچی موضوع مطالعات گسترده ای بوده است باتوجه به تنوع گونه های گیاهی در استان کرمان واهمیت قارچهای میکوریزی در ...

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