Wild tomato species

Progress was made possible by use of a different source for membrane preparations. It had been shown by Felix and Boiler [26] that cell suspension cultures of a wild tomato species (Lycopersicon peruvianum) give a characteristic response to systemin. After addition of systemin an alkalinization of the culture medium was observed paralleled by an efflux of K+. Systemin also caused an increase in the activities of 1-... 

Galactolipase Wild tomato species Higher activity in chilling-sensitive species Gemel et at., 1988... 

Leptlnotarsa decemllneata, -Tomatine also acts as a feeding deterrent for U deceml lneata (25) and the tomatine content of the wild tomato species that are resistant to L, deceml lneata Is generally higher than that of commercial tomato cultlvars (8). Nonetheless, the evidence that -tomatine Is responsible for the resistance of any tomato genotypes to 1 decemllneata Is Inconclusive, but suggestive. 

J. Bordner. 1980. 2-Tridecanone a naturally occurring insecticide from the wild tomato species Lycopersicon hirsutum f. glabratum. Science 207 888-889. 

Stommel J, Haynes K (1994) Inheritance of beta-carotene content in the wild tomato species Lycopersicon cheesmanii. J Hered 85 401-404... 

Yates H, Frary A, Doganlar S, Frampton A, Eannetta N, Uhlig J, Tanksley S (2004) Comparative fine mapping of fruit quality QTLs on chromosome 4 introgressions derived from two wild tomato species. Euphytica 135 283-296... 

Sewell, M. M., Parks, C. R. and Chase, M. W. 1996. Intraspecific chloroplast DNA variation and biogeography of North American Lin odendron L. (Magnoliaceae). Evolution 50 1147-1154. Shapiro, J. A., Steffens, J. C. and Mutschler, M. A. 1994. Acylsugars of the wild tomato Lycopersicon pennellii in relation to geographic distribution of the species. Biochem. Syst. Ecol. 22 545-561. 

The wild tomato L. hlrsutum f. glabra turn PI134417 is highly resistant to MU sexta, deceml lneata and zea because its foliage is toxic to the larvae of all three species (16, 26, 29). 

We have been involved in mechanistic studies aimed at understanding the basis of glandular trichome-based insect resistance in wild Solarium (potato) and Lycopersicon (tomato) species. Much effort has focused on identification of wild members of the Solanaceae with potentially useful resistance traits for introgression into Solarium tuberosum and Lycopersicon esculentum. In many cases resistance has been shown to be conferred by glandular trichomes, modified epidermal cells (i) which function as physical and/or chemical barriers against insect attack (2-10 > Tingey, this volume). 

The wild tomato, Lycopersicon pennellii, and the wild potato, Solanum berthaultiif are two species which exhibit insect resistance conferred by glandular trichomes. S, berthaultii and L. pennellii have been the focus of efforts at Cornell University to transfer trichome-based insect resistance traits. This chapter reviews our knowledge of the biochemistry of glandular trichome-based insect resistance in these species. 

The literature is less extensive on the use of protoplasts in stress-tolerance investigations however, some applications have been attempted. For example, in one study protoplasts were isolated from the leaves of a wild relative of tomato shown to be salt tolerant and from a salt-sensitive, cultivated species (Rosen Tal, 1981). In the presence of NaCI the plating efficiency (number of surviving cells/number of cells applied to the plate) of the wild relative was greater than the cultivated, sensitive cultivar. Proline, when added to the culture media, was found to enhance the plating efficiency of the salt-sensitive cultivar but not the wild, salt-tolerant relative. These results suggest that traits related to salt tolerance are expressed by the isolated protoplasts and that the response of protoplasts to environmental stress can be manipulated, i.e. the proline response. 

Plastid transformation is highly dependent on the tissue culture process because it enables copies of the wild-type plastid genome to be selectively eliminated before plant regeneration (Maliga, 2003). However, many of the crop species regenerated in this way turn out to be sterile, a consequence of plant regeneration from tissue culture. As mentioned earlier, the transformation of Arabidopsis, tomato, potato, rice, and rape seed oil has been achieved at very low efficiencies, and the resulting transformants... 

High elevation species include other underexploited products fibers, dyes, unorthodox food sources, grains such as quinua, kiwicha, kaniwa, exotic amaranths and little known tubers, e.g. ollucos and macas from the Punas of Peru and Bolivia, to mention just a few. Natural and immensely valuable germoplasm banks of wild potatoes, tomatoes and other solanum and cucurbitaceous species to improve existing cultivars, feed themselves from plants native to the alpine and subalpine belts. 

Amino acids, organic acids, sugars Fruits and leaves of wild species of tomato GC-MS 58... 

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