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Lolium perenne, common name perennial ryegrass, [1] English ryegrass, winter ryegrass, or ray grass, is a grass from the family Poaceae. It is native to Europe, Asia and northern Africa, but is widely cultivated and naturalised around the world.
Roots of intermediate wheatgrass, a perennial grain candidate compared to those of annual wheat (at left in each panel) A perennial grain is a grain crop that lives and remains productive for two or more years, rather than growing for only one season before harvest, like most grains and annual crops.
The primary species found worldwide and used both for lawns and as a forage crop is perennial ryegrass (Lolium perenne). Like many cool-season grasses of the Poaceae, it harbors a symbiotic fungal endophyte, either Epichloë or its close relative Neotyphodium, both of which are members of the fungal family Clavicipitaceae. [10] [11]
Cool-season grasses, such as Kentucky bluegrass, fescues, and perennial ryegrass, planted in cold regions go dormant in winter too. A dormant lawn is not absorbing water or nutrients. There is no ...
Some chemical defenses once thought to be produced by the plant have since been shown to be synthesized by endophytic fungi. The chemical basis of insect resistance in endophyte-plant defense mutualisms has been most extensively studied in the perennial ryegrass and three major classes of secondary metabolites are found: indole diterpenes, ergot alkaloids and peramine.
Rye (Secale cereale) is a grass grown extensively as a grain, a cover crop and a forage crop. It is grown principally in an area from Eastern and Northern Europe into Russia. It is much more tolerant of cold weather and poor soil than other cereals, making it useful in those regions; its vigorous growth suppresses weeds and provides abundant forage for animals early in the yea