PJB-2024-1564
Ultraviolet treated Aspergillus terreus SH 13 detoxifies higher levels of chromate and mitigates chromate stress in Brassica napus by reducing exposure of host tissues
Hamza Bacha, Anwar Hussain, Muhammad Hamayun, Muhammad Irshad, Shumaila Siraj, Sufaid Khan, Abdulwahed Fahad Alrefaei, Yong-Sun Moon, Amjad Iqbal, Zahid Ali Butt, Muhammad Saeed Akhtar and Sajid Ali
DOI:10.30848/PJB2024-6(28)
Abstract
Contamination of agricultural lands by the heavy metal is a serious biological and environmental issue. Such a hazard can be minimized and confronted by enhancing the growth promoting and chromium alleviating competences of fungal endophytes. Current attempt was made to find the effect of ultra violet (UV) irradiation on plant growth promoting and Cr alleviating capabilities of fungal endophytes. For the said purpose spore suspension of various fungal endophytes were exposed to UV irradiation for various time points i.e., 15, 30 and 45 min. After exposure to UV, the strains were screened for their bio-remediating abilities. Among the UV irradiated fungal endophytes, the growth promoting and Cr alleviating capabilities of Aspergillus terreus strain SH 13 was significantly (P=0.05) increased in comparison to its wild type. The elevated level of Cr in the soil resulted in growth inhibition of the seedlings. However, the UV irradiated SH 13 isolate has restored the growth parameters of the seedling in the said Cr stress. The increase in host plant lengths was almost 2 folds greater than those supplemented with non-UV irradiated SH 13 strain. The UV treated isolate effectively cut down the absorption of Cr from soil to root, allowing the seedlings to resume their normal growth and functions. Moreover, the strain exhibited extensive ability to strengthen the host antioxidant system by lowering ROS accumulation, improving ROS scavenging, and promoting plant’s antioxidant contents (phenol and flavonoids). The above findings suggest that UV exposure can enhance growth promoting and bio-remediating (Cr reclamation) abilities of A. terreus SH 13
To Cite this article:
Bacha, H., A. Hussain, M. Hamayun, M. Irshad, S. Siraj, S. Khan, A.F. Alrefaei, Y.S. Moon, A. Iqbal, Z.A. Butt, M.S. Akhtar and S. Ali. 2024. Ultraviolet treated Aspergillus terreus SH 13 detoxifies higher levels of chromate and mitigates chromate stress in Brassica napus by reducing exposure of host tissues. Pak. J. Bot., 56(6): DOI: http://dx.doi.org/10.30848/PJB2024-6(28)
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