Plant species effects on ecosystem processes are mediated by traits such as litter quality and exudation. These same traits also influence the activity and distribution of animals that play key roles in regulating ecosystem dynamics. We planted monocultures of eight plant species commonly found in California grasslands to investigate the relative importance of plant species direct effects on ni...

M A N Y characters which would-be desirable in cultivated crops are known to exist in related species and genera. The most striking examples of such characters are the resistances to various diseases. Where hybridization can be achieved between the pertinent genera, attempts have been made to transfer genes for these desired characters into the genome of the cultivated species. Partially for th...

Aegilops tauschii Coss. is the D-genome donor to hexaploid bread wheat (Triticum aestivum) and is the most promising wild species as a genetic resource for wheat breeding. To study the population structure and diversity of 81 Ae. tauschii accessions collected from various regions of its geographical distribution, the genomic representation of these lines were used to develop a diversity array t...

the high molecular weight glutenin subunit (hmw-gs) compositions of 19 diploid wild wheat (t.boeoticum) and 36 diploid wild wheat (a.tauschii) were determined by sodium dodecyl sulphate polyacrylamide gel electrophoresis (sds-page). all of t. boeoticum were characterized for their hmw-gs, showed 2* in their glu-a1 locus. in the study of aegilops tauschii that were collected from iran and 7 neig...

The filamentous fungus Neurospora crassa is a model laboratory organism, but in nature is commonly found growing on dead plant material, particularly grasses. Using functional genomics resources available for N. crassa, which include a near-full genome deletion strain set and whole genome microarrays, we undertook a system-wide analysis of plant cell wall and cellulose degradation. We identifie...

Polyploidy has been ubiquitous in plant evolution and is thought to be an important engine of biodiversity that facilitates speciation, adaptation, and range expansion. Polyploid species can exhibit higher ecological tolerance than their progenitor species. For allotetraploid species, this higher tolerance is often attributed to the existence of heterosis resulting from entire genome duplicatio...