The treatments consisted of lettuce cultivars: Baba-de-Verão, Cinderela, Elba, Mônica, Solaris, and Veneranda. A randomized block experimental design was used, with four replications. Thus, the objective of this work was to evaluate the production and post-harvest quality of lettuce cultivars in different crop seasons in western Alagoas, Brazil. Growing lettuce under high temperatures and light incidence, as in the Alagoas State hinterland, Brazil, induces early tasseling and decreases the quality of the product. Those variations were higher in the protected system than in the hydroponic system and contents of anthocyanin were higher in the conventional system. Variation in the contents of chlorophyll were also found. The best results for CO2 net assimilation rate regarded to photosyntheticaly active photon flux density were found in the hydroponic system, for both lettuce cultivars. Mimosa Roxa presented higher contents of anthocyanin in the conventional system (88.24 mg g-1 FM) than the ones in the hydroponic system (36.89 mg g-1 FM). Mimosa Verde cultivar presented lower average contents of total chlorophyll (7.7 mg g-1 FM) than Mimosa Roxa (11.8 mg g-1FM), and both cultivars displayed higher means for this variable in the hydroponic farming system. Mimosa Verde cultivar (MV) showed greater fresh mass than Mimosa Roxa (MR), in both farming systems and the two cultivars presented better performance in the hydroponic system (287.7 g MV and 139.1 g MR) than the conventional system (129.7 g MV and 111.8 g MR). The following two experiments were carried out: hydroponics farming (HF) and conventional farming (CF), performed in protect and unprotect environments, respectively, in Floriano´polis, SC. The objective of this study was to evaluate the performance of two lettuce cultivars on hydroponic and conventional farming systems for the production of fresh mass (FM) and dry mass (DM), photosynthesis, contents of chlorophyll and anthocyanin. However, the hydroponic farming system has been gaining importance in the market, wining confidence from consumers, who are becoming increasingly more demanding on food quality. It is widely grown in the conventional farming system. Lettuce (Lactuca sativa L.) is the most commonly consumed leaf vegetable in the Brazilian diet, and it is a good source of vitamins and minerals.
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