生态环境学报
生態環境學報
생태배경학보
ECOLOGY AND ENVIRONMENT
2013年
7期
1226-1230
,共5页
镉胁迫%玉米CT38%生长%生理特性
鎘脅迫%玉米CT38%生長%生理特性
력협박%옥미CT38%생장%생리특성
cadmium%corn CT38%growth%physiological characteristics
研究了模拟条件下外源镉胁迫长期作用下对盆栽玉米CT38生长和生理特性的影响。通过向土壤中添加不同浓度的镉，设定1，5，15，50，100 mg?kg-1等5种镉质量分数，研究不同镉质量分数长期处理下对玉米CT38生长发育的影响。实验结果表明：处理90 d时玉米植株高度、鲜质量镉处理质量分数1，5，15，50，100 mg?kg-1在处理90 d时株高分别比对照下降了7.7%，10.3%，18.2%，56.1%，59.8%，鲜质量分别比对照下降了9.2%，31.7%，53.3%，66.9%，77.9%。高质量分数镉（100 mg·kg-1）胁迫下玉米叶片细胞膜透性、游离脯氨酸含量明显增加。叶片MDA含量随镉处理质量分数升高而增加，高质量分数浓度镉处理则含量下降，镉胁迫导致膜脂过氧化发生，处理浓度越高，则膜脂过氧化越强，当镉胁迫质量分数超过玉米耐受范围玉米自身受害。可溶性蛋白变化趋势随镉胁迫质量分数升高呈单峰曲线，低质量分数镉胁迫刺激其含量升高，提高叶片功能，高质量分数镉胁迫则降低其含量，加速叶片衰老。
研究瞭模擬條件下外源鎘脅迫長期作用下對盆栽玉米CT38生長和生理特性的影響。通過嚮土壤中添加不同濃度的鎘，設定1，5，15，50，100 mg?kg-1等5種鎘質量分數，研究不同鎘質量分數長期處理下對玉米CT38生長髮育的影響。實驗結果錶明：處理90 d時玉米植株高度、鮮質量鎘處理質量分數1，5，15，50，100 mg?kg-1在處理90 d時株高分彆比對照下降瞭7.7%，10.3%，18.2%，56.1%，59.8%，鮮質量分彆比對照下降瞭9.2%，31.7%，53.3%，66.9%，77.9%。高質量分數鎘（100 mg·kg-1）脅迫下玉米葉片細胞膜透性、遊離脯氨痠含量明顯增加。葉片MDA含量隨鎘處理質量分數升高而增加，高質量分數濃度鎘處理則含量下降，鎘脅迫導緻膜脂過氧化髮生，處理濃度越高，則膜脂過氧化越彊，噹鎘脅迫質量分數超過玉米耐受範圍玉米自身受害。可溶性蛋白變化趨勢隨鎘脅迫質量分數升高呈單峰麯線，低質量分數鎘脅迫刺激其含量升高，提高葉片功能，高質量分數鎘脅迫則降低其含量，加速葉片衰老。
연구료모의조건하외원력협박장기작용하대분재옥미CT38생장화생리특성적영향。통과향토양중첨가불동농도적력，설정1，5，15，50，100 mg?kg-1등5충력질량분수，연구불동력질량분수장기처리하대옥미CT38생장발육적영향。실험결과표명：처리90 d시옥미식주고도、선질량력처리질량분수1，5，15，50，100 mg?kg-1재처리90 d시주고분별비대조하강료7.7%，10.3%，18.2%，56.1%，59.8%，선질량분별비대조하강료9.2%，31.7%，53.3%，66.9%，77.9%。고질량분수력（100 mg·kg-1）협박하옥미협편세포막투성、유리포안산함량명현증가。협편MDA함량수력처리질량분수승고이증가，고질량분수농도력처리칙함량하강，력협박도치막지과양화발생，처리농도월고，칙막지과양화월강，당력협박질량분수초과옥미내수범위옥미자신수해。가용성단백변화추세수력협박질량분수승고정단봉곡선，저질량분수력협박자격기함량승고，제고협편공능，고질량분수력협박칙강저기함량，가속협편쇠로。
The pot experiment was conducted to study the effects of added cadmium (Cd) on growth and physiological characteristics of Zea Mays L. CT38. By adding different concentration in the soil cadmium, set 1, 5, 15, 50, 100 mg?kg-1 5 Cd concentration, to study the effect of different concentration of cadmium long-term treatment on the growth and development of maize CT38. The results showed that height, fresh weight of cadmium concentration 1, 5, 15, 50, 100 mg?kg-1 90 d processing plant height when compared against the fallen 7.7%, 10.3%, 18.2%, 56.1%, 59.8%, fresh weight, respectively dropped against 9.2%, 31.7%, 53.3%, 66.9%, 77.9%. High concentrations of cadmium (100 mg?kg-1) free stress on maize leaf membrane permeability. Protine content increased significantly. Contents of MDA in leaves increased with elevated cadmium concentration, high concentration of cadmium concentration, cadmium stress leading to membrane lipid peroxidation occurs, higher concentration, membrane lipid peroxidation stronger, when a range of cadmium concentrations exceed the tolerance of maize corn itself injured. Change trend with higher cadmium concentrations of soluble protein was a unimodal curve, low concentrations of cadmium stress stimulate the rise in its content, increase blade features, high concentrations of cadmium stress reducing its content, accelerated leaf senescence.
