| 杨顺强,任广鑫,杨改河,冯永忠.8种美国引进禾本科牧草保护酶活性与抗旱性研究[J].干旱地区农业研究,2009,27(6):144~148 |
| 8种美国引进禾本科牧草保护酶活性与抗旱性研究 |
| Study on protective enzyme activity and drought resistance of 8 introduced American forage species |
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| DOI：10.7606/j.issn.1000-7601.2009.06.28 |
| 中文关键词: 禾本科牧草 水分胁迫 保护酶 模糊隶属法 |
| 英文关键词:gramineal grasses water stress protective enzyme fuzzy subordination |
| 基金项目:国家林业局948项目(2006-4-11)； 西北农林科技大学人才基金(01140512)； 昭通师范高等专科学校第三批校级课题(XJKZ0901) |
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| 中文摘要: |
| 通过盆栽控水试验,研究了猫尾草(Phleum Pratense L.)、扁穗冰草(Agropyron desertorum)、苇状羊茅(Festuca arundinacea Schreber)等8种引进禾本科牧草在不同水分胁迫下叶片丙二醛(MDA)含量及超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和过氧化物酶(POD)活性的动态变化。结果表明:MDA含量随水分胁迫加深而增加,在轻微水分胁迫下增加剧烈,而在中度和严重水分胁迫下增加缓慢;SOD、CAT和POD的总体变化趋势是:随水分胁迫加深酶活性先升高后降低;SOD活性在轻微和中度水分胁迫下变化平缓,在严重水分胁迫下急剧降低;CAT活性在所有处理下变化平缓,且维持较高活性;POD活性变化幅度较大,但在严重水分胁迫下仍能维持较高活性;运用模糊隶属法进行抗旱性综合评价,得出抗旱性强弱顺序为:苇状羊茅>高冰草>细茎披碱草>猫尾草>扁穗冰草>新麦草>披碱草>无芒雀麦。 |
| 英文摘要: |
| Pot experiment was adopted to study the activity change of MDA,SOD,CAT and POD in 8 forage species introduced from USA.The results indicated that MDA content increased greatly under low water stress,but the increase tended to slow when water stress became moderate and high.As to SOD,CAT and POD,with the increasing water stress,enzyme activity increased first and then began to decrease.Under low and moderate stress conditions the activity of SOD had no significant change but sharply decreased when water stress became high.The activity of CAT was comparatively high and changed slightly under all treatments.Although the activity of POD changed significantly,it still maintained a relatively high level even under serious stress conditions.At last,fuzzy subordination method was used for comprehensive evaluation of grass drought resistance and the result of the 8 species was Festuca arundinacea Schreber > Agropyron elongatum > Elymus junceus Fischer > Phleum Pratense L.> Agropyron desertorum > Agropyron trachycaulum > Elymus dahuricus Turcz.ex Griseb.> Bromus Inermis Leyss. |
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