PJB-2023-4
ZINC SOLUBILIZING BACTERIA SYNERGIZE THE EFFECT OF ZINC SULPHATE ON GROWTH, YIELD AND GRAIN ZINC CONTENT OF RICE (ORYZA SATIVA).
MUHAMMAD SHAKEEL
Abstract
Zinc solubilizing bacteria inhabiting root endosphere possesses great potential to enhance plant yield by solubilizing the nutrients. The potential of Zn solubilizing bacteria Bacillus sp SH-10, Bacillus cereus SH-17 to improve produce and grain zinc percentage of rice was investigated under various regimens of individual and co-inoculation in the presence and absence of chemical fertilizer zinc sulphate (ZnSO4). The strains were used to the rice strains basmati-385 and super basmati under area requirements for the years of 2013-14. A substantial enhanced development of rice, i.e., height (102-118 cm), tiller number per plant (8.5-11.5), percentage of chlorophyll (29.5-35.1), zinc requiring enzymes i.e. superoxide dismutase (SOD) (396-570 g-1 FW) and carbonic anhydrase activity (CA) (10-15.06 U g-1 FW) and grain yield (3.0-3.8 tons-ha-1) were studied in these plants inoculated with Bacillus sp in along with fertilizer (ZnSO4). Association of Zinc solubilizing bacteria also caused higher grain Zn content (25.0-30.5 mg-kg-1) of the rice strains basmati-385 as well as super basmati in comparison with un-inoculated plants. Hence, it can be concluded that Zn solubilizing bacteria has immense potential to be used as agricultural crop inoculants as they synergize the effect of chemical Zn, increase yield and improve the nutritional value of crops.
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