土壤盐分胁迫对三种暖季型草坪草保护酶活性及脂质过氧化作用的影响.PDF

2005, 18(3) :336~ 341 Forest Research :2005) 1 2 周兴元, 曹福亮 ( 1. , 212400;2. , 210037) : 3 : 0. 6%~ 0.8%(SODCATPODAPX),0.2%~ 0. 4% ,MDARPP ,, , PAL , 0. 8%,MDA RPP , , , :; ;; :S688.4 :A Effects of Soil Salt Stress on the Activity of Protective Enzymes and Peroxidation in Three Warmseason Turfgrasses 1 2 ZHOUXingyuan , CAO Fuliang (1.Jiangsu Agriculture and Forestry Polytechnic College, Jurong 212400, Jiangsu, China ; 2.Nanjing ForestryUniversity, Nanjing 210037, Jiangsu, China) Abstract:Activity of protective enzy esandperoxidation inthreewar seasonturfgrassesunder soil salt stresswere studied. The re sultsshowed:the activitiesof severalprotective enzy es(SOD, CAT, PODandAPX) of Centipedegrassunder 0.6%~ 0.8% salt stress declinedgraduallywith the stress prolonged, while the activities of protective enzy es increased in 0.2%~ 0.4% salt stressof Cen tipedegrass andallthe treat ents of Zoysiagrass andManilagrass. MDA andRPP increased actually with the stress enhanced and pro longed, The increasing speed in Centipedegrasswas the highest and inManilagrasswasthe lowest. Activity of PAL increasedwith salt concentration increased in three turfgrasses, but under 0.8% salt stress, it increased in early phase of stress and decreasedwith the stress prolonged inCentipedegrass. The activity of protective enzy es and contentsof MDA andRPPwererelatedto the salt tolerance. It was considered that salt tolerance of Manilagrasswasthe highest and that of Centipedegrass the lowest. Key words:salt stress; war season turfgrass; activity of protective enzy es; peroxidation , (CAT) (APX), ,, ,