Metabolism of lipid and fatty acid composition of early dwarf cashew (Anacardium occidentale L.) leaves under water deficiency / Metabolismo da composição lipídica e de ácidos gordos do caju anão precoce (Anacardium occidentale L.) folhas sob deficiência de água

In the present study, were used seeds of precocious dwarf-cashew ( Anacardium occidentale L.) CCP 076. The plants were cultivated at green house in vermiculite and water (2:1 v/v) in plastic pots. 40 days after the cultivation, the irrigation of a group of plants was suspended, destined to the stressed treatment. The total fatty acids total contents (determined by TLC and CG/MS) and the unsaturation index they were analyzed with 30, 45 and 60 days after the suspension of the irrigation. The CG/MS evidenced the presence of the following fatty acid: palmitic acid (16:0), stearic acid (18:0), oleic acid (18:1), linoleic acid (18:2) and linolenic acid (18:3). The most severe level of hydric deficiency applied (60 days of stress) induced reductions in the content of 18:3 (44,4 %) and increase in the content of 16:0 (25,6%). The index presented a reduction of 11 % to the 60 days of water stress.