| aerospora of an eragrostis curvula pasture in south africa. | a qualitative and quantitative survey was made of the aerospora above an eragrostis curvula (schrad.) nees pasture. the pasture, which lay adjacent to a field of panicum coloratum l. where an outbread of ovine photosensitivity had occurred, was not grazed during the survey. a burkard volumetric spore trap was used to sample the aerospora continuously for 10 months. twenty components of the aerospora were recognized: spores of 9 genera of fungi (cladosporium, alternaria, epicoccum, drechslera, pi ... | 1979 | 460819 |
| secondary photosensitisation of sheep grazing bambatsi grass (panicum coloratum var makarikariense). | | 1990 | 2085302 |
| the isolation and identification of steroidal sapogenins in kleingrass. | kleingrass (panicum coloratum l) has been reported to cause hepatogenous photosensitization in sheep and goats in west texas since 1973. the toxin in kleingrass has been suspected of being a steroidal saponin as kleingrass produced characteristic birefringent crystals similar to those produced by saponin-containing plants such as agave lecheguilla and tribulus terrestris. in this present study, steroidal saponis were isolated from kleingrass and their sapogenins were identified as diosgenin and ... | 1990 | 2389543 |
| kleingrass-associated hepatotoxicosis in horses. | chronic hepatic disease was diagnosed in 6 horses with history of anorexia and weight loss. these horses consistently had abnormally high serum gamma-glutamyltransferase activities, total and direct bilirubin and blood ammonia values, and sulfobromophthalein clearance times, whereas serum iditol dehydrogenase, aspartate transaminase, and alkaline phosphatase activities were variable. in the 6 horses, histologic examination of the liver revealed lesions of chronic hepatitis with varying degrees o ... | 1988 | 3192474 |
| kleingrass (panicum coloratum l.) poisoning in sheep. | twenty-four lambs grazing pastures of panicum coloratum developed photosensitization secondary to hepatic dysfunction. lesions were necrosis of scattered hepatocytes, obstruction of small bile ducts and bile canaliculi by small aggregates of birefringent crystals, and accumulation of birefringent crystals in phagocytes within sinusoids. the number of crystals in livers of affected sheep varied, depending on the amount of time of exposure to toxic plants and severity of hepatic abnormalities. cry ... | 1987 | 3455080 |
| photosenitization of sheep on kleingrass pasture. | the clinical appearance and serum gamma-glutamyl transpeptidase (ggt) activity were studied in 5 groups of sheep (12 per group) on kleingrass (panicum coloratum) pasture plots and in 1 group of sheep (10 animals) on native buffalograss (buchloë dactyloides) pasture. eleven sheep (at least 1 from each group on kleingrass pasture plots) had elevated serum ggt activity. seven of 11 sheep with elevated serum ggt activity developed signs of photosensitization. none of the sheep on buffalograss pastur ... | 1980 | 6108949 |
| faster rubisco is the key to superior nitrogen-use efficiency in nadp-malic enzyme relative to nad-malic enzyme c4 grasses. | in 27 c4 grasses grown under adequate or deficient nitrogen (n) supplies, n-use efficiency at the photosynthetic (assimilation rate per unit leaf n) and whole-plant (dry mass per total leaf n) level was greater in nadp-malic enzyme (me) than nad-me species. this was due to lower n content in nadp-me than nad-me leaves because neither assimilation rates nor plant dry mass differed significantly between the two c4 subtypes. relative to nad-me, nadp-me leaves had greater in vivo (assimilation rate ... | 2005 | 15665246 |
| evaluation on potential of wild hosts as trap plants for managing gramineous stemborers in maize based-agroecosystem. | as part of habitat management system to control cereal stemborers, various wild hosts used as trap plants were studied during the dry season from november 2003 to march 2004 at melkassa, central ethiopia. five wild hosts of the family poaceae [pennisetum purpurum (schumach), sorghum vulgare variety sudanense (pers.), panicum coloratum l., sorghum arundinaceum stapf, and hyperrhania rufa (nees)] were evaluated as trap plants in maize, zea mays l.,-based agroecosystem. the results of the study sho ... | 2008 | 18330115 |
| description and sem observations of a new species of cyst nematode heterodera goldeni (nematoda: heteroderidae) attacking panicum coloratum in egypt. | a cyst nematode, heterodera goldeni n. sp., is photographed and described from qasabagrass roots (panicum coloratum l.) in alexandria, egypt. it is characterized in having second-stage juveniles with body length of 546 microm (450-612), stylet length of 22.6 microm (22-23.5) with anchor-shaped knobs, lateral field with 3 lines, tail 60-75 microm, hyaline tail terminus 38.4 microm (33-43); cysts are lemon-shaped, dark to light brown with an extensive sub-crystalline layer covering the entire cyst ... | 2002 | 19265949 |
| loss of a large grazer impacts savanna grassland plant communities similarly in north america and south africa. | large herbivore grazing is a widespread disturbance in mesic savanna grasslands which increases herbaceous plant community richness and diversity. however, humans are modifying the impacts of grazing on these ecosystems by removing grazers. a more general understanding of how grazer loss will impact these ecosystems is hampered by differences in the diversity of large herbivore assemblages among savanna grasslands, which can affect the way that grazing influences plant communities. to avoid this ... | 2014 | 24554031 |