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Fig. 8 | BMC Plant Biology

Fig. 8

From: Physiological and iTRAQ-based proteomic analyses reveal the function of exogenous γ-aminobutyric acid (GABA) in improving tea plant (Camellia sinensis L.) tolerance at cold temperature

Fig. 8

Effect of application of exogenous GABA at low temperature on (a) DAPs and (b) RT-qPCR analysis of genes related to amino acid metabolism and AsA/glutathione cycle. Transcript abundance was calculated according to the difference in cycle threshold values between the target gene and β-actin transcripts normalized by the 2−ΔΔCT method. The mRNA levels of the genes in tea leaves at 0 h were set as 1.0. Data represent the mean value ± standard deviation. Means with different letters significantly differ from each other (p ≤ 0.05). Abbreviations: ASA1: anthranilate synthase alpha subunit 1; CM2: chorismate mutase 2; GGAT2: glutamate--glyoxylate aminotransferase 2-like; GLN1–4: glutamine synthetase 1–4; GPX7: glutathione peroxidase 7; GSTF10: glutathione S-transferase PHI 10; GSTF9: glutathione S-transferase PHI 9; LAP2: Cytosol aminopeptidase family protein; LGALDH: L-galactose dehydrogenase; MDAR5: monodehydroascorbate reductase 5, chloroplastic-like; METK4: S-adenosylmethionine synthetase 4; PGK3: phosphoglycerate kinase precursor; RPE: ribulose-5-phosphate-3-epimerase; SK1: shikimate kinase 1; TKL-2: transketolase 2

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