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''Astrebla'' is a small genus of xerophytic (desert-loving) grasses found only in Australia They are the dominant grass across much of the continent.〔(Atlas of Living Australia, ''Astrebla'' F.Muell. ex Benth., Mitchell Grass )〕 They are commonly known as Mitchell grass after Scottish explorer, Thomas Mitchell (1792 – 1855), who first collected a specimen near Bourke in New South Wales. Mitchell grasses grow on clay soils, mainly between a lower limit of 200mm average annual rainfall, and an upper limit of 600mm. They can be found growing in depressions in lower rainfall areas, where the water concentrates following rains e.g. in Sturt's Stony Desert. Mitchell grasses are deep rooted and become dormant during drought, allowing them to survive extended periods without rainfall.〔(FutureBeef Program for Northern Australia )〕 Understanding the mechanisms and genetic triggers of this drought dormancy could help breed more resilient crop and pasture plants as global environments potentially become drier under climate change.〔(Tropical Forages )〕 ;Species〔(Kew World Checklist of Selected Plant Families )〕〔(The Plant List search for ''Astrebla'' )〕 # ''Astrebla elymoides'' - hoop Mitchell grass, the second most common species # ''Astrebla lappacea'' - curly Mitchell grass, the most common species # ''Astrebla pectinata'' - barley Mitchell grass, the most drought tolerant species # ''Astrebla squarrosa'' - bull Mitchell grass, the most flood tolerant species ==See also== *List of Poaceae genera 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Astrebla」の詳細全文を読む スポンサード リンク
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