Caeoma cassiopae sp. nov., a rust on Cassiope tetragona in the Canadian Rocky Mountains.
نویسنده
چکیده
Caeoma cassiopae sp. nov. (Uredinales) is described on the arctic-alpine shrub Cassiope tetragona. It was found in three locations in the Rocky Mountains of west-central Alberta, and is the first rust reported on the genus Cassiope. The sori resemble the uredinia of species in the genus Chrysomyxa. The host in the Ericaceae also suggests affinity with that genus. However, the spore morphology, studied by light and scanning electron microscopy, does not resemble known species of Chrysomyxa.
منابع مشابه
Rust fungi on rhododendrons in Asia: Diaphanopellisforrestii gen. et sp. nov., new species of Caeoma, and expanded descriptions of Chrysomyxa dietelii and C. succinea.
Many rust fungi (Uredinales) that infect rhododendrons are difficult to identify because of similar spore size and overall morphology. As part of a morphological study of rusts in the genus Chrysomyxa, herbarium specimens of Asian rhododendron rusts were examined by light and scanning electron microscopy. They were compared with similar taxa from Europe and North America. Revised and illustrate...
متن کاملRevision of the Empis subgenus Enoplempis Bigot, east of the Rocky Mountains (Diptera: Empididae).
The Empis subgenus Enoplempis Bigot, east of the Rocky Mountains of North America is revised. A total of 19 species are recorded from this region including seven new species: E. (En.) amytis Walker, E. (En.) appalachicola Sinclair sp. nov., E. (En.) arthritica Melander, E. (En.) ctenonema Melander, E. (En.) enodis Melander, E. (En.) gladiator Melander, E. (En.) gulosa Coquillett, E. (En.) lorip...
متن کاملNo divergence in Cassiope tetragona (L.) D. Don: persistence of growth response along a latitudinal temperature gradient and under long-term experimental warming
The dwarf shrub Cassiope tetragona is increasingly used for arctic climate reconstructions, the reliability of which depends on a linear climate-growth relationship. Here, we examine the stability of the relationship between climate and annual growth parameters by using a spatial scale from the high to subarctic and long-term experimental warming at a high arctic site. We created four growth ch...
متن کاملTwenty-Two Years of Warming, Fertilisation and Shading of Subarctic Heath Shrubs Promote Secondary Growth and Plasticity but Not Primary Growth
Most manipulation experiments simulating global change in tundra were short-term or did not measure plant growth directly. Here, we assessed the growth of three shrubs (Cassiope tetragona, Empetrum hermaphroditum and Betula nana) at a subarctic heath in Abisko (Northern Sweden) after 22 years of warming (passive greenhouses), fertilisation (nutrients addition) and shading (hessian fabric), and ...
متن کاملSnow cover and extreme winter warming events control flower abundance of some, but not all species in high arctic Svalbard
The High Arctic winter is expected to be altered through ongoing and future climate change. Winter precipitation and snow depth are projected to increase and melt out dates change accordingly. Also, snow cover and depth will play an important role in protecting plant canopy from increasingly more frequent extreme winter warming events. Flower production of many Arctic plants is dependent on mel...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Mycologia
دوره 95 1 شماره
صفحات -
تاریخ انتشار 2003