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Zn Bioaccumulation and Expression of Zn Transporter Genes in Solanum lycopersicum
Author(s)
Iqbal Munir Institute of Biotechnology and Genetic Engineering, the University of Agriculture Peshawar, Khyber Pakhtunkhw-Pakistan
Attequr Rahman Institute of Biotechnology and Genetic Engineering, the University of Agriculture Peshawar, Khyber Pakhtunkhw-Pakistan
Mian Afaq Ahmad Institute of Biotechnology and Genetic Engineering, the University of Agriculture Peshawar, Khyber Pakhtunkhw-Pakistan
Aqib Iqbal Institute of Biotechnology and Genetic Engineering, the University of Agriculture Peshawar, Khyber Pakhtunkhw-Pakistan
Hamza Iqbal Institute of Biotechnology and Genetic Engineering, the University of Agriculture Peshawar, Khyber Pakhtunkhw-Pakistan
Maaz Iqbal Institute of Biotechnology and Genetic Engineering, the University of Agriculture Peshawar, Khyber Pakhtunkhw-Pakistan
Umair Munir Institute of Biotechnology and Genetic Engineering, the University of Agriculture Peshawar, Khyber Pakhtunkhw-Pakistan
Abstract
Zn (Zn) is one of the most important elements with vital biological roles and its deficiency causes malnutrition with serious consequences for both plants and humans. The Zinc solubilizing bacteria (ZSB) have the potential to improve bioavailability, modify partitioning and biofortify plant tissues with Zn. Fifty (50) strains of rhizobacteria were isolated from soils under maize, rice or undisturbed forests from District Dir in Khyber Pakhtunkhwa, Pakistan. The bacterial strains were screened for different Zn solubilization and plant growth promotion traits. Two bacterial strains, DJ55 and DJ24 were tested for the Zn solubilizing potential on plate media and both showed variable levels of Zn solubilization i.e., higher and lower, respectively. The bacterial strains, applied to the plants in the pot experiment, showed improved growth parameters compared to control conditions. DJ55 when applied with insoluble source showed improved plant height, leaf number and leaf area compared to DJ24 and control conditions while maximum fruit weight was shown using ZnSO4 as synthetic fertilizer. An increase in chlorophyll contents was noted in plants treated with ZnSO4 while maximum carotenoid contents was observed in plants treated with DJ55+ZnO when compared with their controls. Plants supplemented with Zn oxide and DJ55 showed higher Zn content and Fe content ppm as compared to their respective controls. Due to the availability of Zn in the soil the expression pattern of SLZIP5 and SLZIP4 genes were changed in the root and shoot. Zn oxide in the medium up-regulates both gene expression in root and shoot of tomato plants. Inoculation of tomato plants with ZSB and insoluble Zn oxide through the medium, expression of SLZIP5 and SLZIP4 genes were reduced in root and shoot. Our results indicated that ZSB can play a crucial role in the bioaccumulation and partitioning of Zn and Fe and therefore may be exploited for improving crop nutrition.
Publication Details
Page(s) 8-8
DOI DOI not available
Published Journal: Abstract Book on International Conference on Sustainable Agriculture and Food Security, August 27-31, 2023 , Volume: 0, Issue: 0, Year: 2023
Keywords
Gene expression Solanum lycopersicum PGPRS Zinc Solubilization ZIP Transporter
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