Amelioration potential of biochar for chromium stress in wheat

AbstractThis study aimed to examine the influence of increasing doses of chromium (Cr) (26, 39, and 52 mg kg−1 soil) and elemental sulfur (S) (60 mg kg−1 soil) on growth, yield, and mineral nutrition in wheat and maize. Macro- and micronutrients and Cr concentrations were determined in the aboveground parts of plants. All examined doses of Cr caused a marked decrease in the fresh and dry weight of maize. Wheat was more tolerant than maize, and lower Cr doses caused a small but statistically significant increase in the total yield. Wheat accumulated more than twofold Cr than maize, and the concentrations increased with higher Cr concentrations in the soil. The application of S significantly improved the total biomass production and lowered the Cr content in both plants. Cr changed the mineral nutrition in both cereals, but the pattern of changes observed was not the same. Applying S alleviated some adverse effects caused by the Cr. Hence, it is concluded that the application of elemental S may be an effective strategy to reduce adverse effects in plants grown on soil contaminated by heavy metals, especially Cr.

Download Full-text

Response of NAC transcription factor genes against chromium stress in sunflower (Helianthus annuus L.)

Plant Cell Tissue and Organ Culture (PCTOC) ◽

10.1007/s11240-018-01529-8 ◽

2018 ◽

Vol 136 (3) ◽

pp. 479-487 ◽

Cited By ~ 3

Author(s):

Merve Yuce ◽

Mahmut Sinan Taspinar ◽

Murat Aydin ◽

Guleray Agar

Keyword(s):

Transcription Factor ◽

Helianthus Annuus ◽

Nac Transcription Factor ◽

Helianthus Annuus L ◽

Transcription Factor Genes ◽

Chromium Stress

Download Full-text

Phytohormone up-regulates the biochemical constituent, exopolysaccharide and nitrogen metabolism in paddy-field cyanobacteria exposed to chromium stress

10.21203/rs.2.21187/v1 ◽

2020 ◽

Author(s):

Sanjesh Tiwari ◽

Anuradha Patel ◽

Sheo Mohan Prasad

Keyword(s):

Nitrogen Metabolism ◽

Uptake Rate ◽

Paddy Field ◽

Growth Parameter ◽

Glutamate Synthase ◽

Nostoc Muscorum ◽

Biochemical Constituent ◽

Diazotrophic Cyanobacteria ◽

Chromium Stress ◽

Cr Uptake

Abstract Current study deals with the assuaging effects of two phytohormones; indole acetic acid (IAA; 290 nM) and kinetin (KN; 10 nM) on growth, phycobiliproteins, status of nitrogen metabolism and biochemical constituents; protein, carbohydrate and exopolysaccharide contents in two diazotrophic cyanobacteria Nostoc muscorum and Anabaena exposed to chromium (CrVI) stress (100 µM and 150 µM). Chromium individually at both the tested doses expressively declined the growth, chlorophyll a to carotenoid ratio and contents of phycobiliproteins; phycocyanin (PC), allophycocyanin (APC), and phycoerythrin (PE). With distinctive impact on status of nitrogen metabolism chromium significantly reduced the nitrate (NO3—) and nitrite (NO2—) uptake rate and foremost decrease in nitrate and ammonia assimilating enzyme; nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS), glutamate synthase (GOGAT) except glutamate dehydrogenase (GDH). However, beneath alike condition, exogenous application of IAA and KN exhibited noteworthy assuaging effects on growth-regulating parameters in both the paddy field cyanobacteria, which consummately occurred as a result of substantial decrease in Cr uptake and inducing signaling responses and also enhances the growth parameter i.e. nitrogen metabolism as a result of considerable lowering in Cr induced damaging effect on nitrogen metabolism and uptake rate, and the alleviating effect was more pronounced with the lower dose of Cr, efficient in N.muscorum than Anabaena.

Download Full-text