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Endophytic bacteria enhance the growth and salt tolerance of rice under saline conditions [Elektronski vir]Do, Quang Trung ; Luu, The Anh ; Ngo, Tien ChuongRazvoj biostimulantov iz bakterij, ki pospešuejo rast na sol tolerantnih rastlin (PGP) je razvijajoča se strategija za vzdržnostno kmetijstvo v času naraščajočega zasoljevanja tal. Namen raziskave je ... bil izolirati endofitske bakterije (EB), ki so sposobne pospeševati kalitev semen riža in rast sejank pri različnih koncentracijah NaCl. Izoliranih je bilo devet na sol tolerantnih sevov EB in dva seva, ST.6 in ST.8, ki sta pospeševala kalitev semen riža za 99,3 in 99,7 %. Ta dva seva sta bila izolirana in določena kot vrsti Pantoea dispersa in Bur-kholderia cenocepacia. Sev ST.6 je pokazal večjo vrednost v ak-tivnosti fosfataze (617 mg P ml-1), v produkciji indole-3-ocetne kisline (19,7 μg IAA ml-1), v aktivnosti deaminaze 1-aminocik-lopropan-1-karboksilne kisline (ACC) (13,5 μmol mg−1 protein h−1) in v tvorbi sideroforov (76,3 %). Še posebej so sejanke riža, inokulirane s sevom ST.6, pokazale značilno izboljšanje v dolžini korenin (58,95 %), dolžini poganjkov (16,6 %), suhi biomasi (7,0 %), v vsebnosti klorofila (46,2 in 57,1 % za klorofil a in b), karotenoidov (22,2 %) in prolina (19,0 %). V sejankah riža, inokuliranih s sevom ST.6 ali ST.8, je bil opazen tudi upad aktivnosti antioksidacijskih encimov v razmerah solnega stresa. Nadalje so razmere solnega stresa pospešile kolonizacijo korenin z obema sevoma preučevanih endofitskih bakterij. Še več poskusov bo potrebnih, da bi razvili seva endofitskih bakterij ST.6 in ST.8 kot učinkovita bioinokulanta.Source: Acta agriculturae Slovenica [Elektronski vir]. - ISSN 1854-1941 (Vol. 119, No. 1, 2023, 11 str.)Type of material - e-articlePublish date - 2023Language - englishCOBISS.SI-ID - 156410115
Author
Do, Quang Trung |
Luu, The Anh |
Ngo, Tien Chuong
Topics
endophytes |
salt stress |
plant growth-promoting bacteria |
proline |
antioxidant enzymes |
seed germination |
Oryza sativa |
rice |
riž |
endofiti |
slanostni stres |
bakterije |
kalitev semen |
bakterije, ki pospešujejo rast rastlin
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Do, Quang Trung | |
Luu, The Anh | |
Ngo, Tien Chuong |
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