Tropaeolum majus

In microsomes from Sinapis alba L.,33,34 Tropaeolum majus L.,35,36 and Carica papaya L.,37 the aromatic amino acids (tyrosine and phenylalanine) have been shown to be converted to the corresponding oximes by cytochrome P450-dependent monooxygenases. The conversion of tyrosine to the corresponding oxime in microsomes from S. alba was approximately 1000 fold lower than in microsomes from the cyanogenic sorghum.33 This made a biochemical approach for the isolation... 

DU, L., HALKIER, B.A., Isolation of a microsomal enzyme system involved in glucosinolate biosynthesis from seedlings of Tropaeolum majus L, Plant Physiol., 1996,111,831-837. 

Tropaeolum majus cytochrome P450 Conversion of phenylalanine to phenylacetaldoxime 104... 

Crombie, H.J., Chengappa, S., Hellyer, A. and Reid, J.S.G. (1998). A xyloglucan oligosaccharide-active, transglycosylating beta-D-glucosidase from the cotyledons of nasturtium (Tropaeolum majus L) seedlings — purification, properties and characterization of a cDNA clone. Plant J., 15, 27-38. 

LYKKESFELDT, J., M0LLER, B.L., Synthesis of benzylglucosinolate in Tropaeolum majus L. Isothiocyanates as potent enzyme inhibitors., Plant Physiol., 1993, 102, 609-613. 

Garzon G.A. Wrolstad R.E. 2009. Major anthocyanins and antioxidant activity of Nasturtium flowers (Tropaeolum majus). Food Chem. 114 44-49. 

Scientists from the University of Guelph (McCutcheon et ai, 1976) repeated the earlier study by Abdellatif and Vies (1973) and found that erucic acid will increase heart lesions irrespective of the source of erucic acid, i.e., whether from a HEAR oil or from a non-Brass/ca source, such as nasturtium seed (Tropaeolum majus) (Table V). They reported that removal of linolenic acid (18 3) from a simulated HEAR oil which contained 28.7% 22 1 resulted in a significant reduction in the severity of heart lesions. On the other hand, increasing the level of linoleic acid (18 2) in a HEAR oil or a simulated HEAR oil had no apparent effect. These results suggest that there may be an interaction of erucic and linolenic acid, or that linolenic acid predisposes the heart to lesions. 

The host range of the diamondback moth, Plutella xylos-tella, appears to be correlated with the presence of glucosinolates in the host plants, but the role of stimulants and attrac-tants in oviposition seem to be important. Extracts of Brassica oleracea (cabbage), B.juncea (mustard), and Erysimum cheiranthoides stimulated oviposition by gravid females on bean plants. Extracts of Erysimum cheiranthoides, Tropaeolum majus, and Capsella bursa-pastoris which deterred oviposition by the cabbage butterfly Pieris rapae, were not deterrent to Plutella xylostella (Renwick and Radke, 1990). 

PhCH2C(SGlc)=N0S03H C14H19NO9S2 409.437 Isol. from seeds of Tropaeolum majus (garden nasturtium), Lepidium sativum (garden cress) and other crucifers. Present in maca tubers Lepidium meyenii). Possesses antibiotic props. 

Glucotropaeolin Benzyl isothiocyanate Phenylalanine Tropaeolum majus Lepidium sativum... 

Benzyl isothiocyanate, obtained by hydrolysis of glucosinolates in Tropaeolum majus, is cytotoxic and active against several human tumour cell lines (Pintao et al. 1995). Nasturtium is traditionally used for acute bronchitis and in dermatology for skin rashes, mild burns and dandruff (Bruneton 1995). 

Pintao, A., Pais, M., Coley, H. and Jndson, I. 1995, Tn vitro and in vivo antitumonr activity of benzyl isothiocyanate a natural product from Tropaeolum majus, Planta Medica 61 233-236. 

Lohden, I., Frentzen, M. (1992) Triacylglycerol biosynthesis in developing seeds of Tropaeolum majus L. and Limnanthes douglasii R. Br. Planta 188, 215-224. 

Sun et al., 1988 Bernerth and Frentzen, 1990). Although nasturtium (Tropaeolum majus) can incorporate erucic acid into position 2 of its TAG, the process does not involve LPAAT (Lohden and Frentzen,... 

ITC found naturally in several plants such as Carica papaya L., Indian cress (Tropaeolum majus L.) and garden cress (Lepidium sativum L.) (Troncoso-Rojas etal. 2005) (Fig. 4.3). 

Figure 6.18. Proposed mechanism for the biosynthesis of benzylglucosinolate (glucotropaeolin) in Tropaeolum majus...

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