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Effects of Sulfate on the Physiology, Biochemistry, and Activity of Group 1 Sulfate Transporters in Seedlings of Brassica pekinensis.

Authors :
Prajapati, Dharmendra
Patani, Anil
Patel, Margi
Ali, Daoud
Alarifi, Saud
Yadav, Virendra Kumar
Tank, Jigna
Patel, Ashish
Source :
Horticulturae; Jul2023, Vol. 9 Issue 7, p821, 21p
Publication Year :
2023

Abstract

It is well known that some plants have the capability of taking up sulfur as a nutrient from the atmosphere through foliar absorption and can survive well in polluted environments. In order to observe the effects of the relationship between atmospheric hydrogen sulfide (H<subscript>2</subscript>S) deposition and soil sulfur nutrition, the current study used Brassica pekinensis as a model plant. The objective in conducting this study was to understand the regulatory mechanisms engaged in the uptake and assimilation of sulfate (SO<subscript>4</subscript><superscript>2−</superscript>) in plants by studying the modulation of transcription levels of sulfate transporter genes (STGs) (Sultr1;1 and Sultr1;2), changes in growth physiology, and the potential of roots to uptake the SO<subscript>4</subscript><superscript>2−</superscript> when allowed to grow in the presence or absence of SO<subscript>4</subscript><superscript>2−</superscript> in a hydroponic nutrient solution. Changes in growth, physico-chemical parameters, and gene expression levels of Group 1 STGs were observed when sulfur-treated and non-treated plants were exposed to phytotoxic H<subscript>2</subscript>S levels in the air. Sulfur deficiency enhanced nitrate and free amino acid (FAA) concentrations in the shoot and root regions of the plant. However, there was a significant decrease in the biomass, shoot/root ratio (SRR), chlorophyll content, and thiol content, with p-values < 0.01. This, in turn, increased the sulfur-uptake capacity of plants from the atmosphere through foliar absorption. When the sulfur-uptake capacity of plants increased, there was an increase in the expression level of Group 1 sulfate transporter genes (Sultr1;1 and Sultr1;2), which regulate sulfur transportation through roots. The growth, physico-chemical characteristics, and level of gene expression of Group 1 STGs were unaffected by the availability of excess sulfur in the atmosphere of up to 0.3 μL l<superscript>−1</superscript>. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
23117524
Volume :
9
Issue :
7
Database :
Complementary Index
Journal :
Horticulturae
Publication Type :
Academic Journal
Accession number :
169331695
Full Text :
https://doi.org/10.3390/horticulturae9070821