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632     A. Scialabba et al.

              acid and show very limited variation in FA composi-  Acknowledgements
              tion (Röbbelen & Thies 1980).
                                                                The authors thank the Germplasm Bank of the
                FA composition was reported for  B. incana,
                                                                Botanical Garden of the University of Palermo for
              B. rupestris  and  B. villosa  by Velasco et al. (1998)
                                                                providing the accessions of Brassicaceae. Special
              with the amount of C 22:1 exceeding 50% of T-
                                                                thanks go to Prof. F. M. Raimondo for the critical
              FA, while in the species analysed in the present
                                                                review of the manuscript and to Dr Massimo
              study the results never exceeded 25%; however, the
                                                                Migliorini for helpful suggestions in the statistical
              absolute value of FA cannot be compared since the
                                                                analysis. Financial support was provided by Palermo
              authors did not report such data. The correlation
                                                                University (Fondi di Ateneo), by the Italian MIUR
              between T-FA content and C 18:1, C 18:2 and C
                                                                (PRIN 2007) and by Siena University (P.A.R.).
              22:1 FA suggests that in the seeds of the taxa analy-
              sed here, unsaturated FA content was prevalent.
              The positive correlation between T-Toc and γ-Toc  References
              and the negative correlation between T-Toc and α-
                                                                Appelqvist LA, Kornfeldt AK, Wennerholm JE. 1981. Sterols
              Toc indicate that in the seeds analysed T-Toc        and steryl esters in some  Brassica  and  Sinapis  seeds.
              mainly accounts for γ-Toc synthesis. Since γ-Toc is  Phytochemistry 20: 207–210.
              the immediate precursor of  α-Toc, the availability  Azuma K, Ippoushi K, Ito H, Higasho H, Terao J. 1999. Evalu-
              of the last enzyme needed for  α-Toc synthesis,  γ-  ation of the antioxidants activity of vegetable extracts in
                                                                   linoleic emulsion and phospholipids bilayers. J Sci Food Agric
              methyltransferase could be rate-limiting (Della
                                                                   79: 2010–2016.
              Penna & Pogson 2006). Similarly, the positive     Baecher CWW. 1994. Cancer preventive properties of  Brassica
  Downloaded By: [Scialabba, A.] At: 20:01 10 October 2010
              correlation between the very long-chain C 22:1 and   oleracea. Rev Am J Clin Nutr 59: 1166–1170.
              C 18:1 FA clearly confirms that the former is     Bellani LM, Salvini L, Scialabba A. 2009. Characterization of
              formed by elongation of the latter. A positive corre-  Brassica fruticulosa Cyr. seeds. Bocconea 23: 451–457.
                                                                Conti F, Abbate G, Alessandrini A, Blasi C. 2005. An annotated
              lation between C 18:3, T-Toc and  γ-Toc and a
                                                                   check-list of the Italian vascular flora. Roma: Palombi. p. 420.
              negative correlation between  α- and  γ-Toc were  Della Penna D, Pogson BJ. 2006. Vitamin synthesis in plants: Toco-
              observed in 91 species of Brassicaceae (Goffman et   pherols and carotenoids. Annu Rev Plant Biol 57: 711–738.
              al. 1999) and in vegetable oils (Kamal-Eldin &    Drissi A, Girona J, Cherki M, Godàs G, Derouiche A, El Messal
              Andersson 1997).                                     M, et al. 2004. Evidence of hypolipemiant and antioxidant
                                                                   properties of argan oil derived from the argan tree (Argania
                The presence of brassicasterol is typical for the
                                                                   spinosa). Clin Nutr 23: 1159–1166.
              Brassicaceae family (Gül & Amar 2006) and the     Evangelou A, Kalpouzos G, Karkabounas S, Liasko R, Nonni A,
              relative percentages of phytosterol were in line with  Stefanou D, et al. 1997. Dose-related preventive and
              those reported for B. napus L., B. campestris L. and  therapeutic affects of antioxidants anticarcinogens on
              B. juncea (L.) Coss. (Appelqvist et al. 1981).       experimentally induced malignant tumors in  Wistar rats.
                                                                   Cancer Lett 115: 105–111.
                However, FA and phytosterol profiles were not
                                                                Faulkner K, Mithen R, Williamson G. 1998. Selective increase
              found to be useful to discriminate species as no     of the potential anticarcinogen 4-methylsulphinylbutyl
              correlation was detected. The chemical composition   glucosinolate in broccoli. Carcinogenesis 19: 605–609.
              of the seeds analysed is interesting for the presence  Geraci A, Divaret I, Raimondo FM, Chèvre AM. 2001. Genetic
              of Toc, phytosterols and unsaturated FA, all         relationships between Sicilian wild populations of  Brassica
                                                                   analysed with RAPD markers. Plant Breed 120: 193–196.
              compounds with antioxidant effects and positively
                                                                Giardina G, Raimondo FM, Spadaro V. 2007. A catalogue of
              correlated with a reduced risk of cardiovascular     plants growing in Sicily. Bocconea 20: 15–582.
              diseases, a reduced level of cholesterol (Drissi et al.  Goffman FD, Becker HC. 2002. Genetic variation of tocopherol
              2004; Gül & Amar 2006) and ameliorated diabetic      content in a germplasm collection of  Brassica napus  L.
              nephropathy (Kataya & Hamza 2008). The Toc           Euphytica 125: 189–196.
                                                                Goffman FD, Thies W, Velasco L. 1999. Chemotaxonomic value
              content investigated in a collection of  B. napus
                                                                   of tocopherols in Brassicaceae. Phytochemistry 50: 793–798.
              (Goffman & Becker 2002) and  B. fruticulosa  Cyr.  Grob R, Barry E. 2004. Modern practice of gas chromatography.
              seeds (Bellani et al. 2009) was lower than in the B.  Hoboken, NJ: Wiley. p. 1064.
              villosa group, except for B. villosa subsp. brevisiliqua.  Gül MK, Amar S. 2006. Sterols and the phytosterol content in
              Hybrids between commercial broccoli and B. villosa   oilseed rape (Brassica napus L.). J Cell Mol Biol 5: 71–79.
                                                                Harbert DJ. 1972. A contribution to the cytotaxonomy of
              subsp. villosa and B. v. subsp. drepanensis are fully
                                                                   Brassica (Cruciferae) and its allies. Bot J Linn Soc 65: 1–23.
              fertile and have developed lines with enhanced levels  Heywood VH, Zohary D. 1995. A catalogue of the wild rela-
              of glucosinolates (Faulkner et al. 1998).  B. villosa  tives of cultivated plants native to Europe.  Fl Medit 5:
              subsp.  villosa,  B. v.  subsp.  bivoniana,  B. v.  subsp.  375–415.
              drepanensis and B. v. subsp. tinei had the highest T-  Jones PJ, Raeini-Sarjaz M, Ntanios FY, Vanstone CA, Feng JY,
                                                                   Parsons WE. 2000. Modulation of plasma lipid levels and
              Toc, γ-Toc and phytosterol contents, suggesting that
                                                                   cholesterol kinetics by phytosterol versus phytostanol esters.
              they could be exploited in breeding programmes to    J Lipid Res 41: 697–705.
              develop genotypes with enhanced antioxidant capac-  Kamal-Eldin AQ, Andersson R. 1997. A multivariate study of
              ities and nutritional value.                         the correlation between tocopherol content and fatty acid
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