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. 2020 Jun 17;11:896. doi: 10.3389/fpls.2020.00896

Figure 1.

Figure 1

Primary metabolism compounds in leaves of healthy (H) and flavescence dorée-infected (FD) vines cv. ‘Loureiro’, collected in two grape berry developmental stages (green and mature). (A) chlorophyll a; (B) chlorophyll b levels; (C) reducing sugars and (D) sucrose levels. Results indicate mean ± SD of values of three biological replicates. Asterisks indicate statistical significance between FD-infected and the corresponding control (healthy) within each sample type following the Student’s t-test: *P ≤ 0.05; **P ≤ 0.01; ***P ≤ 0.001; ****P ≤ 0.0001.