Pošlji prispevek (e-pošta) Povečanje fitoremediacijske učinkovitosti vrste Echinochloa colona (L.) Link z bakterijami, ki sproščajo fosfor v tleh, onesnaženih s svincem
Povzetek
Obetajoča rešitev za fitoremediacijo s kovinami onesnaženih tal je uporaba rastlin v kombinaciji z bakterijami, ki sproščajo fosfor (PSB). V raziskavi so bili preučevani izolati teh bakterij iz riževih polj in njihova sposobnost izboljšanja fitoremediacije svinca (Pb2+) s plevelno vrsto kostrebe (Echinochloa colona (L.) Link) kot tudi izboljšanje rasti te rastline v razmerah kovinskega stresa zaradi onesnaženja s svincem. Celokupno je bilo izoliranih 6 izolatov PSB (označenih kot TB01 do TB06), pri čemer je imel izolat TB04 največjo sposobnost sproščanja fosforja (z indeksom PSI = 7,13) iz kalcijevega fosfata (Ca3(PO4)2). Na sposobnost sproščanja fosforja pri sevu TB04 niso vplivale velike koncentracije Pb2+. Sev TB04 je bil identificiran kot vrsta bakterije Pseudomonas putida Trevisan, 1889 (številka akcesije FJ976601.1). Inokulacija kostrebe s sevom TB04 je značilno povečala njeno fitoremediacijsko učinkovitost za svinec v s svincem onesnaženih tleh, pri čemer je bila njena rast značilno pvečana. Rezultati nakazujejo, da bi sev TB04 lahko potencialno uporabili kot inokulant kostrebe kot nov način fitoremediacije s kovinami onesnaženih močvirnih tal.
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DOI: http://dx.doi.org/10.14720/aas.2022.118.3.2454
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