草业学报
草業學報
초업학보
PRATACULTURAL SCIENCE
2015年
5期
100-107
,共8页
岑画梦%彭玲莉%杨雪%吴亚娇%廖源林%李西%陈其兵%蔡仕珍
岑畫夢%彭玲莉%楊雪%吳亞嬌%廖源林%李西%陳其兵%蔡仕珍
잠화몽%팽령리%양설%오아교%료원림%리서%진기병%채사진
Cd2+%狗牙根%假俭草%种子萌发%幼苗生长
Cd2+%狗牙根%假儉草%種子萌髮%幼苗生長
Cd2+%구아근%가검초%충자맹발%유묘생장
cadmium%Cynodon dactylon%Eremochloa ophiuroides%seed germination%seedling growth
探讨了Cd2+浓度对狗牙根与假俭草种子萌发和幼苗生长的影响。结果表明,两草种种子的发芽势、发芽率、发芽指数、活力指数、根长以及幼苗长度均随Cd2+浓度的升高而降低;叶片叶绿素含量随Cd2+浓度的升高略有降低;叶片丙二醛(MDA)含量随Cd2+浓度的升高呈先降后升趋势;狗牙根过氧化氢酶(CAT)活性随Cd2+浓度升高呈先升高后降低趋势,在5.0 mg/L时显著高于CK,假俭草各处理浓度的CAT活性均低于CK;两草种的过氧化物酶(POD)活性随Cd2+浓度的升高呈先升高后降低趋势,并在10.0 mg/L 时达到峰值;Cd2+浓度在5.0,10.0,20.0,40.0 mg/L时,狗牙根和假俭草多酚氧化酶(PPO)活性均高于CK,两草种PPO 活性随Cd2+浓度的升高都呈先升高后降低趋势。两草种对 Cd2+均有一定的耐受能力,狗牙根耐受能力大于假俭草,二者均可以应用于Cd2+轻度污染土壤。
探討瞭Cd2+濃度對狗牙根與假儉草種子萌髮和幼苗生長的影響。結果錶明,兩草種種子的髮芽勢、髮芽率、髮芽指數、活力指數、根長以及幼苗長度均隨Cd2+濃度的升高而降低;葉片葉綠素含量隨Cd2+濃度的升高略有降低;葉片丙二醛(MDA)含量隨Cd2+濃度的升高呈先降後升趨勢;狗牙根過氧化氫酶(CAT)活性隨Cd2+濃度升高呈先升高後降低趨勢,在5.0 mg/L時顯著高于CK,假儉草各處理濃度的CAT活性均低于CK;兩草種的過氧化物酶(POD)活性隨Cd2+濃度的升高呈先升高後降低趨勢,併在10.0 mg/L 時達到峰值;Cd2+濃度在5.0,10.0,20.0,40.0 mg/L時,狗牙根和假儉草多酚氧化酶(PPO)活性均高于CK,兩草種PPO 活性隨Cd2+濃度的升高都呈先升高後降低趨勢。兩草種對 Cd2+均有一定的耐受能力,狗牙根耐受能力大于假儉草,二者均可以應用于Cd2+輕度汙染土壤。
탐토료Cd2+농도대구아근여가검초충자맹발화유묘생장적영향。결과표명,량초충충자적발아세、발아솔、발아지수、활력지수、근장이급유묘장도균수Cd2+농도적승고이강저;협편협록소함량수Cd2+농도적승고략유강저;협편병이철(MDA)함량수Cd2+농도적승고정선강후승추세;구아근과양화경매(CAT)활성수Cd2+농도승고정선승고후강저추세,재5.0 mg/L시현저고우CK,가검초각처리농도적CAT활성균저우CK;량초충적과양화물매(POD)활성수Cd2+농도적승고정선승고후강저추세,병재10.0 mg/L 시체도봉치;Cd2+농도재5.0,10.0,20.0,40.0 mg/L시,구아근화가검초다분양화매(PPO)활성균고우CK,량초충PPO 활성수Cd2+농도적승고도정선승고후강저추세。량초충대 Cd2+균유일정적내수능력,구아근내수능력대우가검초,이자균가이응용우Cd2+경도오염토양。
The effect of Cd2+ concentration on the germination and growth of Cynodondactylon and Eremochloa ophiuroides has been studied.The results showed that the seed germination rate,germination vigor,germina-tion index,vigor index,root length and seedling length of the two turfgrass species decreased with increases in Cd2+ concentration.Chlorophyll content in leaves decreased slightly and the MDA contents in leaves showed a rising trend after an initial drop with increasing Cd2+ concentration.The CAT activities of C. dactylon in-creased at first and then decreased with increasing concentrations.At a Cd2+ concentration of 5 .0 mg/L,CAT activities were significantly higher than that of CK,while the CAT activities of E. ophiuroides in all treat-ments were lower than that of CK.The POD activities of the two turfgrass species increased at first and then decreased with increasing Cd2+ concentration,reaching its peak at 10.0 mg/L.The PPO activities of C. dac-tylon and E. ophiuroides were higher than CK when the concentrations were at 5.0,10.0,20.0 and 40.0 mg/L.With increasing Cd2+ concentrations,the PPO activities of both species showed a declining trend follow-ing an initial rise.The two turfgrass species have a certain degree tolerance of Cd2+,with the tolerance of C. dactylon greater than that of E. ophiuroides.Both turfgrass species can thus be used in soils with low levels of Cd2+ pollution.