Identification of differential displayed molecules involved in earliness and growth enhancement in tomato plants [electronic resource].

Includes references.

Three tomato genotypes; late flowering, Lycopersicon Iycopersicum "Brandywine", early flowering Lycopersicon Iycopersicum "Sweetie" and the wild type Lycopersicon esculentum "PI 176631", were used to study the effects of both indole acetic acid (IAA) and drought treatments on some morphological and biochemical characters. The results showed that, IAA treatment increased both the growth rate and protein concentration in the three tomato genotypes and stimulated a fragment of cDNA isolated from tomato leaf and stem tissues with a molecular weight of about 740 bp which might be related to auxin regulated gene "LeExp2". PCR amplified genomic DNA fragment of 1000bp suggested that the tomato varieties Castle Rock and Super Strain B could be considered as growth nimiety varieties, while the varieties Peto 86, Floradid and Edcawy could be considered as growth unanimity varieties. Drought treatment caused an increment in protein concentration promoted the flowering in the three tomato genotypes and stimulated the induction of mRNA isolated from tomato flowers on which a cDNA fragment with of about 750bp was PCR hunted with specific primers for the flower gene "Tomf 216". Fragment with molecular weight of about 850bp which may related to Tomf216 gene was PCR amplified form the three tomato varieties, Castle Rock , peto 86 and Floradid compared with the same fragment which was isolated form tomato Lycopersicon esculentum "PI176631". These results suggested that these tomato varieties could considered as an early flowering varieties, while the tomato varieties Super Strain B and Edcawy could be considered as late flowering varieties.

Summary in Arabic.

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