| recognition of pollen and other particulate aeroantigens by immunoblot microscopy. | most grass-pollen types appear identical by normal light microscopy. restricted antigenic cross-reactivity of cynodon dactylon (bermuda grass) pollen allowed development of a new method to identify antigens associated with grass-pollen grains. pollen applied to the surface of an adhesive tape was blotted onto nitrocellulose, and the blots were identified by anti-bermuda-grass antibodies, second antibody, and fluorescence microscopy. of the 44 species of grass pollen studied for specificity of th ... | 1988 | 3049747 |
| legume presence increases photosynthesis and n concentrations of co-occurring non-fixers but does not modulate their responsiveness to carbon dioxide enrichment. | legumes, with the ability to fix atmospheric nitrogen (n), may help alleviate the n limitations thought to constrain plant community response to elevated concentrations of atmospheric carbon dioxide (co(2)). to address this issue we assessed: (1) the effects of the presence of the perennial grassland n(2 )fixer, lupinus perennis, on biomass accumulation and plant n concentrations of nine-species plots of differing plant composition; (2) leaf-level physiology of co-occurring non-fixing species (a ... | 2003 | 12802677 |
| [effects of different cutting system on main typical steppe populations in inner mongolia]. | twelve main typical steppe populations in inner mongolia were selected to investigate the effects of different cutting system on their aboveground standing biomass. the results showed that the test populations could be categorized into 3 groups, i.e., (1) group with decreasing biomass, which included leynzus chinensis, agropyron michnoi, caragana microphylla and carex korshinskyi, with l. chinensis and c. microphylla as the representatives. the average aboveground standing biomass of l . chinens ... | 2005 | 16515182 |
| effects of mycorrhizae on plant growth and dynamics in experimental tall grass prairie microcosms. | experimental microcosms (40 x 52 x 32 cm) containing an assemblage of eight tallgrass prairie grass and forb species in native prairie soil were maintained under mycorrhizal (untreated control) or mycorrhizal-suppressed (fungicide-treated) conditions to examine plant growth, demographic, and community responses to mycorrhizal symbiosis. the fungicide benomyl successfully reduced mycorrhizal root colonization in the fungicide-treated microcosms to only 6.4% (an 83% reduction relative to mycorrhiz ... | 1997 | 21708601 |