植物根際促生菌輔助紅麻修復鉛污染土壤

摘要: 通過盆栽實驗研究土(tu)(tu)壤Pb濃度對(dui)經濟(ji)作物紅(hong)麻(ma)（Hibiscus cannabinus）生(sheng)長、富集及轉運Pb的影響，并將具有較強(qiang)Pb抗性(xing)的植物根際(ji)促生(sheng)菌（PGPR）DBM1（Arthrobacter sp.）接種至紅(hong)麻(ma)根際(ji)，考(kao)察Pb脅迫下PGPR對(dui)紅(hong)麻(ma)的促生(sheng)作用(yong)(yong)，以探索利用(yong)(yong)PGPR輔助重金屬(shu)耐性(xing)植物紅(hong)麻(ma)對(dui)Pb污染土(tu)(tu)壤進行(xing)植物穩定修(xiu)復的可行(xing)性(xing)。

 通過盆栽實驗(yan)研究(jiu)土(tu)(tu)(tu)壤(rang)(rang)Pb濃度對(dui)經(jing)濟(ji)作物(wu)(wu)(wu)紅(hong)(hong)(hong)(hong)麻(ma)(ma)（Hibiscus cannabinus）生(sheng)長、富集(ji)(ji)及轉運Pb的(de)(de)(de)(de)影響，并將具有(you)較(jiao)強Pb抗性(xing)的(de)(de)(de)(de)植物(wu)(wu)(wu)根(gen)(gen)際促(cu)生(sheng)菌（PGPR）DBM1（Arthrobacter sp.）接種至(zhi)紅(hong)(hong)(hong)(hong)麻(ma)(ma)根(gen)(gen)際，考(kao)察Pb脅(xie)迫下(xia)PGPR對(dui)紅(hong)(hong)(hong)(hong)麻(ma)(ma)的(de)(de)(de)(de)促(cu)生(sheng)作用，以(yi)探(tan)索利(li)用PGPR輔助重金屬(shu)耐(nai)性(xing)植物(wu)(wu)(wu)紅(hong)(hong)(hong)(hong)麻(ma)(ma)對(dui)Pb污(wu)染土(tu)(tu)(tu)壤(rang)(rang)進(jin)行植物(wu)(wu)(wu)穩(wen)定(ding)修(xiu)復(fu)的(de)(de)(de)(de)可(ke)行性(xing)。結果表明，土(tu)(tu)(tu)壤(rang)(rang)Pb濃度和接菌處(chu)理均顯著(zhu)影響紅(hong)(hong)(hong)(hong)麻(ma)(ma)的(de)(de)(de)(de)生(sheng)長。紅(hong)(hong)(hong)(hong)麻(ma)(ma)對(dui)Pb具有(you)較(jiao)高(gao)(gao)耐(nai)性(xing)，可(ke)通過將Pb富集(ji)(ji)在根(gen)(gen)部(bu)，并抑(yi)制(zhi)(zhi)其向地上部(bu)轉移(yi)，從(cong)而在中低Pb（Pb400和Pb800處(chu)理）污(wu)染土(tu)(tu)(tu)壤(rang)(rang)中良好定(ding)植和生(sheng)長。土(tu)(tu)(tu)壤(rang)(rang)Pb濃度達到1600 mg·kg-1時(shi)，紅(hong)(hong)(hong)(hong)麻(ma)(ma)生(sheng)長開始受到Pb脅(xie)迫的(de)(de)(de)(de)抑(yi)制(zhi)(zhi)，紅(hong)(hong)(hong)(hong)麻(ma)(ma)通過自身脅(xie)迫抵抗機制(zhi)(zhi)緩(huan)解Pb毒性(xing)。接種DBM1可(ke)有(you)效促(cu)進(jin)紅(hong)(hong)(hong)(hong)麻(ma)(ma)的(de)(de)(de)(de)生(sheng)長，提高(gao)(gao)紅(hong)(hong)(hong)(hong)麻(ma)(ma)葉綠素(su)含量。DBM1對(dui)紅(hong)(hong)(hong)(hong)麻(ma)(ma)的(de)(de)(de)(de)促(cu)生(sheng)作用是由脅(xie)迫誘導(dao)的(de)(de)(de)(de)特(te)性(xing)，在高(gao)(gao)Pb脅(xie)迫下(xia)促(cu)生(sheng)效果更顯著(zhu)。因(yin)此，可(ke)利(li)用植物(wu)(wu)(wu)根(gen)(gen)際促(cu)生(sheng)菌DBM1輔助紅(hong)(hong)(hong)(hong)麻(ma)(ma)對(dui)高(gao)(gao)Pb污(wu)染土(tu)(tu)(tu)壤(rang)(rang)進(jin)行植物(wu)(wu)(wu)穩(wen)定(ding)修(xiu)復(fu)，在促(cu)進(jin)紅(hong)(hong)(hong)(hong)麻(ma)(ma)生(sheng)長的(de)(de)(de)(de)同時(shi)，有(you)效抑(yi)制(zhi)(zhi)Pb向紅(hong)(hong)(hong)(hong)麻(ma)(ma)地上部(bu)的(de)(de)(de)(de)轉移(yi)。

聲明：轉載此文是出于傳遞更多信息之目的。若有來源標注錯誤或侵犯了您的合法權益，請作者持權屬證明與本網聯系，我們將及時更正、刪除，謝謝。

  使用微信“掃一掃”功能添加“谷騰環保網”

如果需要了解更加詳細的內容，請點擊下載 201312032253272790.zip 
        下載該附件請登錄，如果還不是本網會員，請先注冊