Effects of Se Application on Polyamines and Carbon–Nitrogen Metabolism of Pepper Plants Suffering from Cd Toxicity

Perez-Millan, Rafael; Alfosea-Simón, Marina; Simón-Grao, Silvia; Zapata, José María Cámara; Zavala-González, Ernesto A.; Aranda-Martínez, Almudena; Shahid, Muhammad Adnan; Garcı́a-Sánchez, Francisco

doi:10.3390/agronomy11122535

Cited by 5 publications

(1 citation statement)

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“…Furthermore, the expression of genes that encode enzymes involved in N metabolism is similarly impacted by Se treatment. Studies have shown that Se application significantly increased the activities of glutamine synthetase (GS) and glutamate synthase (GOGAT) in tea leaves [22], with comparable outcomes observed in research conducted on pepper [23] and lettuce [24]. Sun et al found that Se application could enhance the expression levels of CsGS, CsGOGAT and CsGDH in tea plants [25].…”

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confidence: 72%

Effects of the Combined Application of Nitrogen and Selenium on Tea Quality and the Expression of Genes Involved in Nitrogen Uptake and Utilization in Tea Cultivar ‘Chuancha No.2’

Zhao,

Bai,

Jin

et al. 2023

Agronomy

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Nitrogen (N) and selenium (Se) are beneficial for tea growth and tea quality; however, it is unknown how the combined application of N and Se affects tea quality and N uptake and utilization in tea plants. In the present study, a hydroponic experiment with three N levels (0, 2 and 4.5 mmol/L) and three Se levels (0, 0.3 and 3 mg/L) was carried out with ‘Chuancha No.2’ as the material, and the contents of tea polyphenols, amino acids and caffeine as well as the expression levels of genes related to N uptake and utilization in tea plants were tracked. The findings reveal that the contents of tea polyphenols, AAs and caffeine in new shoots were the highest when supplied with 0.3 mg/L Se and 4.5 mmol/L N, while the contents of total N, AAs and tea polyphenols in mature leaves were the highest at the concentrations of 3 mg/L Se and 2 mmol/L N. Se supply (0.3 and 3 mg/L) induced an increase in amino acid and tea polyphenol contents in tea shoots under N deficiency conditions, whereas total N content, tea polyphenols and AAs in mature leaves and total N content in tea roots decreased significantly. When supplied with N (2 mmol/L and 4.5 mmol/L), the contents of tea polyphenols and caffeine in new shoots first increased and then decreased with the increase in Se concentration, while the total N content in mature leaves and roots increased. In leaves, CsAMT1.1, CsAMT1.2 and CsAMT3.1 had similar trends, and their expression levels were remarkably upregulated when supplied with 0.3 mg/L Se or 2 mmol/L N, respectively; the expression level of CsGS1.1 was significantly induced by N and Se, while CsGS1.2 and CsTS1 were mainly induced by N. In roots, CsAMT1.1 could play a major role in N uptake under the combined application of N and Se; CsGS1.2 expression was significantly induced compared to CsGS1.1 under the combined application of N and Se. This study explored the potential of the interaction of Se and N to promote tea quality and N uptake and utilization in tea plants.

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