Decarboxylation mechanisms of C4 photosynthesis in Saccharum spp.: increased PEPCK activity under water-limiting conditions

Table 1 Biomass of tolerant (RB92579) and susceptible (SP80–3280) sugarcane plants grown under irrigated and two water deficit conditions

Cultivar	RB92579			SP80–3280
Treatment	Irrigated	3 days Moderate	12 days Severe	Irrigated	3 days Moderate	12 days Severe
LA (cm²)	2658.51 Ba ±114.36	2313.00 Ba ±62.84	1727.82 Bb ±117.22	3316.84 Aa ±110.66	2776.82 Ab ±97.89	2058.72 Ac ±25.65
LDW (Kg)	0.12 Aa ±0.001	0.11 Aa ±0.001	0.09 Ab ±0.001	0.12 Aa ±0.003	0.11 Aa ±0.003	0.09 Ab ±0.005
RDW (Kg)	0.14 Aa ±0.005	0.12 Aa ±0.002	0.08 Ab ±0.008	0.16 Aa ±0.015	0.12 Ab ±0.004	0.08 Ac ±0.003
SDW (Kg)	0.20 Ba ±0.004	0.16 Ab ±0.004	0.14 Ab ±0.004	0.24 Aa ±0.002	0.15 Ab ±0.004	0.13 Ac ±0.004
TDW (Kg)	0.46 Ba ±0.009	0.39 Ab ±0.002	0.32 Ac ±0.011	0.52 Aa ±0.012	0.39 Ab ±0.009	0.30 Ac ±0.007

Leaf area (LA, cm²), leaf dry weight (LDW, kg), root dry weight (RDW, kg), stalk dry weight (SDW, kg) and total dry weight (TDW, kg). Different upper case and lower letters indicate statistical differences between cultivars in each treatment and between water deficit treatments (irrigated, 3 and 12 days of water deficit) for each cultivar, respectively, according to Tukey test (P < 0.05). Values presented as mean ± SE (n = 3)

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