Some species of Brassicaceae family content of glucosinolates. The function of glucosinolates as a principles of phytotoxicity is critically discussed. It has been suggested that some variations in activities of Brassicaceae plant materials is attribute to the differences in glucosinolates concentration and their chemical structure, environmental conditions, but also to the presence of the other unknown active principles

It has been found a prevalence of triinsaturated triglycerides (between 81.5% and 85.8%). Erucic acid, characteristic of the Brassicaceae, was found in main triglycerides. Likewise, most abundant triglycerides have 3, 4 or 5 insaturations. The main ones are: C22:1C18:3C22:1,C22:1 C18:2C22:1 and C22:1C18:3C18:3. | Se ha observado un predominio de los triglicéridos triinsaturados (entre el 81.5% y el 85.8%). El ácido erúcico, característico de las Brassicaceae, se encuentra en los triglicéridos más abundantes. Así mismo, los triglicéridos más abundantes cuentan con 3, 4 ó 5 instauraciones. En la mayoría de los taxones estudiados los principales triglicéridos son C22:1C18:3C22:1,C22:1 C18:2C22:1 y C22:1C18:3C18:3.

Se ha observado un predominio de los trigliceridos triinsaturados (entre el 81.5 por ciento y el 85.8 por ciento). El acido erucico, caracteristico de las Brassicaceae, se encuentra en los trigliceridos mas abundantes. Asi mismo, los trigliceridos mas abundantes cuentan con 3, 4 o 5 insaturaciones. En la mayoria de los taxones estudiados los principales trigliceridos son C22:1C18:3C22:1, C22:1C18:2C22:1 y C22:1C18:3C18:3.

P-protein, a filamentous protein found in the sieve elements of most angiosperms, is believed to function in the sealing of phloem wound sites. We report here on the use of a highly sensitive immunomicroscopy assay to study the ability of P-protein specific monoclonal antibodies RS21, RS22, and RS23, made against the P-protein from Streptanthus tortuosus (Brassicaceae), to recognize the native P-protein in a number of different plant genera. RS21, RS22, and RS23 all recognized the P-protein in other genera within the Brassicaceae including Arabidopsis and in the closely related family, Capparaceae. RS21 and RS22 also were able to bind to the P-protein in plants more distantly related to S. tortuosus. The labeling of P-protein was also observed in the monocots Iris and Narcissus probed with RS21. No label was seen with members of the Poaceae that are reported to lack P-protein. None of the monoclonal antibodies was able to bind to the P-protein in members of the Cucurbitaceae.

Leaf extracts of three Capsella species (Brassicaceae), two diploids and one tetraploid, have been analysed for isozymes of L-glutamate dehydrogenase on polyacrylamide gels. A plastidic GDH (EC 1.4.1.4.) consisted of at least seven bands. Progeny analyses and crossing experiments revealed that within the two diploid species two genetic loci code for this pattern. One of the loci, Gdh1, appeared to be monomorphic. The other locus Gdh2, is polymorphic and segregates for three alleles determining allozymes in accordance with Mendelian inheritance. Estimates of outcrossing rates based on segregation at the Gdh2 locus support the view that one of the diploid species is highly inbred whereas the other is an obligate outbreeder. In the tetraploid species, both loci are apparently duplicated so that four instead of two genes determine the polypeptide structure of plastidic GDH. These loci share the same alleles with the diploid species and no additional allozymes have been detected.

The fatty acid composition of 34 species of plants from a variety of families that grow wild in the Iberian Peninsula was analysed. The aim to the survey was to indentify oils that contain a mix of fatty acids that from a qualitative or quantitative point of view have a commercial value. Because of the diverse taxonomic origin of the samples, the oil content between species was very variable, fluctuating between an average value of 3.4% in the Caryophyllaceae and 31.1% in Euphorbiaceae. Like the oil content, the fatty acid composition was quite variable, but, in general, the main fatty acids were palmitic, oleic, linoleic and linolenic acid, while in the Brassicaceae and in the Apiaceae erucic acid and petroselinic acid were the principal fatty acids respectively. | Se ha estudiado la composición en ácidos grasos del aceite de las semillas en 34 plantas silvestres de la Península Ibérica. Se pretende la obtención de aceites con una composición en ácidos grasos que cualitativa o cuantitativamente puedan resultar de interés desde un punto de vista comercial. Debido al origen taxonómico tan diverso de las muestras, el contenido en aceite resulta muy variable, oscilando entre un valor medio del 3.4% en las Caryophyllaceae y el 31.1% de media en las Euphorbiaceae. Como el contenido en aceite, la composición en ácidos grasos es también bastante Variable, pero en general los principales ácidos grasos son palmítico, oleico, linoleico y linolénico, mientras que en las Brassicaceae domina el ácido erúcico y en las Apiaceae el ácido petroselínico.