Gamma Irradiation Effect on Leaf Gas Exchange and Hormones of Sweet Orange Cv. Mosambi

Author: Kuldeep Singh*, O. Pawasthi, Suchitra Pushkar, Sunil Kumar, Thievenai M. and Kaluram

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Abstract

In the present study, the induced variation in respect to leaf gas exchange and phytohormone parameters were studied in the pre-bearing mutants of sweet orange cv. Mosambi. These mutants were developed through different doses (10, 15, 20, 25, 30 and 35 Gy) of gamma irradiation. A stimulatory and inhibitory effect in respect to the leaf gas exchange parameters was noticed in the mutants developed at lower and higher doses of gamma irradiation respectively. The mutants GS-32 and GS-31 developed from 35 Gy had shown reduction in the A by -41.35% and -31.37% respectively. Ewas witnessed lower in mutants GS-24 (-32.12%) and GS-33 (-27.97%) developed at 25 and 35 Gy respectively. Similar trend was observed to follow in case of gs and Ci values. The peak IAA and ABA content was assayed in the mutants developed at 25-35 Gy. IAA content in leaf tissue was varied between 91.3 ng g-1 in GS-32 to 138.3 ng g-1 in mutants developed with the higher dosimetries of 30 and 35 Gy. The ABA level was recor

Keywords

γ-rays; mutants; leaf gas exchange IAA and ABA.

Conclusion

Gamma irradiation had shown inhibitory and simulative effect on the mutants. It would thus help in evolving desired mutants for economic traits and subsequent use in future breeding. Besides that, responsible gene for these traits can be identified, and transformed in new genetic backgrounds.

References

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How to cite this article

Kuldeep Singh, O. Pawasthi, Suchitra Pushkar, Sunil Kumar, Thievenai M. and Kaluram (2022). Gamma Irradiation Effect on Leaf Gas Exchange and Hormones of Sweet Orange Cv. Mosambi. Biological Forum – An International Journal, 14(1): 576-580.