Rapid Screening of Berseem Clover (Trifolium alexandrinum) Endophytic Bacteria for Rice Plant Seedlings Growth-Promoting Agents

Table 2

CFU counts of endophytic bacteria colonizing internal part of roots of the Iranian rice variety grown in gnotobiotic tube culture for 20 days in Hoagland liquid with or without nitrogen (8 mM as (NH₄)₂SO₄).

Endophytic  isolate	Plant growth medium (Hoagland)	Rice endophyte population
		(log10CFU/g root fresh wt)
		Khazar	Hashemi
E1	+N	6.30	7.03
E2	+N	6.45	6.87
E3	+N	7.68	8.54
E4	+N	7.98	8.15
E5	+N	6.92	7.32
E6	+N	8.34	8.56
E7	+N	8.65	8.96
E8	+N	8.54	9.13
E9	+N	9.21	9.76
E1	−N	5.92	6.43
E2	−N	5.87	6.32
E3	−N	6.21	7.12
E4	−N	6.01	7.04
E5	−N	5.66	6.66
E6	−N	7.87	7.98
E7	−N	7.08	8.45
E8	−N	7.87	8.32
E9	−N	8.90	8.96