现代农业科技
現代農業科技
현대농업과기
XIANDAIHUA NONGYE
2014年
14期
135-136,138
,共3页
铅胁迫%构树%超氧化物歧化酶%过氧化物酶%过氧化氢酶
鉛脅迫%構樹%超氧化物歧化酶%過氧化物酶%過氧化氫酶
연협박%구수%초양화물기화매%과양화물매%과양화경매
lead stress%Broussonetia papyrifera%superoxide dismutase%catalase%peroxidase
采用盆栽试验，设置不同铅污染浓度的土壤作为培养基质（100、300、500、700、1000 mg/kg），研究了铅胁迫对构树一年生幼苗叶片抗氧化酶活性的影响。结果表明：随着培养基质中铅离子浓度增加，构树幼苗叶片中超氧化物歧化酶（SOD）、过氧化氢酶（CAT）活性呈现出先上升后下降的趋势，过氧化物酶（POD）活性则随铅浓度的升高呈上升的总趋势，且在试验浓度范围内，这3种酶的活性变化与对照组差异均不显著，说明构树对铅离子有较强的耐受性，可作为铅污染地区植被恢复树种。
採用盆栽試驗，設置不同鉛汙染濃度的土壤作為培養基質（100、300、500、700、1000 mg/kg），研究瞭鉛脅迫對構樹一年生幼苗葉片抗氧化酶活性的影響。結果錶明：隨著培養基質中鉛離子濃度增加，構樹幼苗葉片中超氧化物歧化酶（SOD）、過氧化氫酶（CAT）活性呈現齣先上升後下降的趨勢，過氧化物酶（POD）活性則隨鉛濃度的升高呈上升的總趨勢，且在試驗濃度範圍內，這3種酶的活性變化與對照組差異均不顯著，說明構樹對鉛離子有較彊的耐受性，可作為鉛汙染地區植被恢複樹種。
채용분재시험，설치불동연오염농도적토양작위배양기질（100、300、500、700、1000 mg/kg），연구료연협박대구수일년생유묘협편항양화매활성적영향。결과표명：수착배양기질중연리자농도증가，구수유묘협편중초양화물기화매（SOD）、과양화경매（CAT）활성정현출선상승후하강적추세，과양화물매（POD）활성칙수연농도적승고정상승적총추세，차재시험농도범위내，저3충매적활성변화여대조조차이균불현저，설명구수대연리자유교강적내수성，가작위연오염지구식피회복수충。
Using a potted planting experiment and lead-contaminated soil with different contamination degrees(100,300,500,700,and 1 000 mg/kg)as culture media,the effect of lead stress on antioxidase activity in the annual seedling leaves of Broussonetia papyrifera was studied. The results showed that,along with the increasing in lead ion concentration in culture media,the activities of superoxide dismutase and catalase in Broussonetia papyrifera seedling leaves increased firstly and then decreased,while the activity of peroxidase showed a general increasing trend as the lead concentration increased.Moreover,within the concentration range of the experiments,variations in the activity of these three enzymes were not significantly different compared to that in the control group,indicating that Broussonetia papyrifera had better lead tolerance and could be used as a restoration plant for lead-contaminated regions.
