| Physiological change of different root types of alfalfa under drought stress at seedling stage |
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| DOI：10.7606/j.issn.1000-7601.2011.05.19 |
| Key Words: Alfalfa root type physiological and biochemical drought resistance |
| Author Name | Affiliation | | NAN Lili | College of Grassland Science,Gansu Agricultural University, Lanzhou 730070, China
Key Laboratory of Grassland Ecosystem of Ministry of Education/Sino-U. S.Centers for Grazing land Ecosystem Sustainability, Lanzhou 730070,China | | SHI Shangli | College of Grassland Science,Gansu Agricultural University, Lanzhou 730070, China
Key Laboratory of Grassland Ecosystem of Ministry of Education/Sino-U. S.Centers for Grazing land Ecosystem Sustainability, Lanzhou 730070,China | | ZHU Xinqiang | College of Grassland Science,Gansu Agricultural University, Lanzhou 730070, China
Key Laboratory of Grassland Ecosystem of Ministry of Education/Sino-U. S.Centers for Grazing land Ecosystem Sustainability, Lanzhou 730070,China | | ZHAO Wenhan | College of Grassland Science,Gansu Agricultural University, Lanzhou 730070, China
Key Laboratory of Grassland Ecosystem of Ministry of Education/Sino-U. S.Centers for Grazing land Ecosystem Sustainability, Lanzhou 730070,China | | HAN Lu | College of Grassland Science,Gansu Agricultural University, Lanzhou 730070, China
Key Laboratory of Grassland Ecosystem of Ministry of Education/Sino-U. S.Centers for Grazing land Ecosystem Sustainability, Lanzhou 730070,China | | TIAN Chenxia | College of Grassland Science,Gansu Agricultural University, Lanzhou 730070, China
Key Laboratory of Grassland Ecosystem of Ministry of Education/Sino-U. S.Centers for Grazing land Ecosystem Sustainability, Lanzhou 730070,China |
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| Abstract: |
| The paper aimed to study the physiological mechanism of different root types of alfalfa to drought stress at seedling stage. It chose tap rooted, creeping rooted, and rhizomatous rooted materials of alfalfa with different drought resistance potted in pots as experimental samples. The results showed that the relative water content and chlorophyll content of alfalfa reduced with the increasing of drought stress degree, and tap rooted M. sativa L.cv. Longdong with strong drought-resistance was less than others. The content of soluble sugar, proline, malondialdehyde, and superoxidedismutase activity of alfalfa rose with increasing the degree of drought, and the soluble sugar content in rhizomatous rooted M. sativa L. cv. Qingshui and creeping rooted M. varia Martin. cv. Gannong No.2 increased more, the proline content and SOD activity in creeping rooted native M. falcata material increased more, The MDA content in tap rooted M. sativa L.cv.Longdong increased more. The orders of subordinate function values from strong to weak was creeping rooted native M. falcata material＞tap rooted M. sativa L.cv.Longdong＞rhizomatous rooted M. sativa L. cv. Qingshui＞creeping rooted M. varia Martin. cv. Gannong No.2. |
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