CAJ | 학술논문

在人工土培条件下，研究了Cr6＋不同胁迫强度（0，300 mg· kg-1，600 mg· kg-1，900 mg· kg -1，1200 mg· kg-1，1500 mg· kg-1）和胁迫时间（萌发期，30天和90天）条件下，对狼尾草的种子萌发状况、植株生长指标及部分生理指标变化的影响。结果表明， Cr6＋浓度在≤600 mg· kg-1时对狼尾草种子萌发无明显影响，达到900 mg· kg -1以上水平时，种子发芽率、发芽势、发芽指数随Cr6＋浓度升高而显著降低； Cr6＋胁迫30天时，随着Cr6＋浓度的提高，狼尾草幼苗根冠比和生物量均表现出逐渐下降的趋势，且下降幅度随浓度的升高而增大，幼苗根系活力、 CAT活性随浓度升高而降低， MDA含量、 POD活性随浓度升高而显著增加；90天后， Cr6＋浓度1500 mg· kg-1处理水平的种苗被毒害致死，其余各形态指标、生理指标及抗氧化酶活性均趋于一致。
재인공토배조건하，연구료Cr6＋불동협박강도（0，300 mg· kg-1，600 mg· kg-1，900 mg· kg -1，1200 mg· kg-1，1500 mg· kg-1）화협박시간（맹발기，30천화90천）조건하，대랑미초적충자맹발상황、식주생장지표급부분생리지표변화적영향。결과표명， Cr6＋농도재≤600 mg· kg-1시대랑미초충자맹발무명현영향，체도900 mg· kg -1이상수평시，충자발아솔、발아세、발아지수수Cr6＋농도승고이현저강저； Cr6＋협박30천시，수착Cr6＋농도적제고，랑미초유묘근관비화생물량균표현출축점하강적추세，차하강폭도수농도적승고이증대，유묘근계활력、 CAT활성수농도승고이강저， MDA함량、 POD활성수농도승고이현저증가；90천후， Cr6＋농도1500 mg· kg-1처리수평적충묘피독해치사，기여각형태지표、생리지표급항양화매활성균추우일치。
Using pot culture method , the effect of Cr 6+on seed germination , plant growth and physiology of Pennise-tum alopecuroides was studied.The tested concentrations of Cr 6+were 300 mg· kg-1 , 600 mg· kg-1 , 900 mg· kg-1 , 1 200 mg· kg -1 and 1 500 mg· kg -1 respectively, and the tested treating time were 30 days and 90 days respec-tively .The results indicated that there was no significant effects on seed germination under the concentrations lower than 600 mg· kg -1 .From the concentration of 900 mg· kg -1 , the seed germination rate , germination potential and germination index significantly decreased with the increase of Cr 6+concentration.As far as treating time was concerned, under the treating time of 30 days, as the increase of Cr6+concentration, the root-shoot ratio and bio-mass showed the tendency of decrease , the root vigor and the activity of CAT decreased with the increase of Cr 6+concentration .The content of MDA and the activity of POD significantly increased with the increase of Cr 6+con-centration.After 90 days, all the morphological indexes , physiological indexes and antioxidase activity were clos-ing in on a consensus except seedlings were poisoned to death at concentration of 1 500 mg· kg-1 .