Physiological and biochemical role of nickel in nodulation and biological nitrogen fixation in Vigna unguiculata L. Walp.

Autor: Mendes NAC; São Paulo State University (UNESP), Via de Acesso Prof. Paulo Donato Castellane S/n, Jaboticabal, SP, Postal Code 14884-900, Brazil., Cunha MLO; São Paulo State University (UNESP), Via de Acesso Prof. Paulo Donato Castellane S/n, Jaboticabal, SP, Postal Code 14884-900, Brazil., Bosse MA; São Paulo State University (UNESP), Via de Acesso Prof. Paulo Donato Castellane S/n, Jaboticabal, SP, Postal Code 14884-900, Brazil., Silva VM; São Paulo State University (UNESP), Via de Acesso Prof. Paulo Donato Castellane S/n, Jaboticabal, SP, Postal Code 14884-900, Brazil., Moro AL; Department of Crop Production, University of Western São Paulo (UNOESTE), Presidente Prudente, SP, Brazil., Agathokleous E; Department of Ecology, School of Applied Meteorology, Nanjing University of Information Science and Technology (NUIST), Nanjing 210044, Jiangsu, China., Vicente EF; São Paulo State University (UNESP), Rua Domingos da Costa Lopes 780, Jd. Itaipu, Postal Code 17602-496, Tupã, SP, Brazil., Reis ARD; São Paulo State University (UNESP), Rua Domingos da Costa Lopes 780, Jd. Itaipu, Postal Code 17602-496, Tupã, SP, Brazil. Electronic address: andre.reis@unesp.br.
Jazyk: angličtina
Zdroj: Plant physiology and biochemistry : PPB [Plant Physiol Biochem] 2023 Aug; Vol. 201, pp. 107869. Date of Electronic Publication: 2023 Jul 04.
DOI: 10.1016/j.plaphy.2023.107869
Abstrakt: Studies on the role of nickel (Ni) in photosynthetic and antioxidant metabolism, as well as in flavonoid synthesis and biological fixation nitrogen in cowpea crop are scarce. The aim of this study was to elucidate the role of Ni in metabolism, photosynthesis and nodulation of cowpea plants. A completely randomized experiment was performed in greenhouse, with cowpea plants cultivated under 0, 0.5, 1, 2, or 3 mg kg -1 Ni, as Ni sulfate. In the study the following parameters were evaluated: activity of urease, nitrate reductase, superoxide dismutase, catalase and ascorbate peroxidase; concentration of urea, n-compounds, photosynthetic pigments, flavonoids, H 2 O 2 and MDA; estimative of gas exchange, and biomass as plants, yield and weight of 100 seeds. At whole-plant level, Ni affected root biomass, number of seeds per pot, and yield, increasing it at 0.5 mg kg -1 and leading to inhibition at 2-3 mg kg -1 (e.g. number of seeds per pot and nodulation). The whole-plant level enhancement by 0.5 mg Ni kg -1 occurred along with increased photosynthetic pigments, photosynthesis, ureides, and catalase, and decreased hydrogen peroxide concentration. This study presents fundamental new insights regarding Ni effect on N metabolism, and nodulation that can be helpful to increase cowpea yield. Considering the increasing population and its demand for staple food, these results contribute to the enhancement of agricultural techniques that increase crop productivity and help to maintain human food security.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Masson SAS. All rights reserved.)
Databáze: MEDLINE
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