An Authenticated Approach towards the Confirmation of Tolerance and Susceptibility against Zinc Stress Toxicity in Reciprocal Introgression Lines of Rice (Oryza sativa L.) [ READ ]
AIJAZ AHMED SOOMRO, Zhang Jian
The acid soils and lands of zinc mining areas are mostly contaminated with zinc toxicity. Therefore, keeping in view the importance of cultivation of rice in such Zinc contaminated areas, this study had been conducted to observe the ill-effects of Zinc (Zn) toxicity on the growth of rice and Zinc content in root and shoot of rice plants and to develop the zinc biofortified rice. Two parents MH63 indica and 02428 japonica along with six reciprocal introgression lines of each highly tolerant and highly susceptible from both of the respective backgrounds to zinc stress brought under study in green house conditions. Zinc in the form of ZnSO4.7H2O at the rate of 200 ppm and control was consequently applied to the rice seedlings for 21 days in hydroponic culture. A decrease in all parameters of the treated seedlings was observed. The highly susceptible RI lines had more content than highly RI tolerant lines. However, the phenotypic performance of tolerant RI lines was better than highly susceptible RI lines. Therefore, rice crop has been brought under further study to know its complete mechanism for zinc toxicity tolerance.
AIJAZ AHMED SOOMRO, Zhang Jian
The acid soils and lands of zinc mining areas are mostly contaminated with zinc toxicity. Therefore, keeping in view the importance of cultivation of rice in such Zinc contaminated areas, this study had been conducted to observe the ill-effects of Zinc (Zn) toxicity on the growth of rice and Zinc content in root and shoot of rice plants and to develop the zinc biofortified rice. Two parents MH63 indica and 02428 japonica along with six reciprocal introgression lines of each highly tolerant and highly susceptible from both of the respective backgrounds to zinc stress brought under study in green house conditions. Zinc in the form of ZnSO4.7H2O at the rate of 200 ppm and control was consequently applied to the rice seedlings for 21 days in hydroponic culture. A decrease in all parameters of the treated seedlings was observed. The highly susceptible RI lines had more content than highly RI tolerant lines. However, the phenotypic performance of tolerant RI lines was better than highly susceptible RI lines. Therefore, rice crop has been brought under further study to know its complete mechanism for zinc toxicity tolerance.
