Transgenic tomato plants with altered polygalacturonase isoforms.

摘要

A method of creating a transgenic tomato containing a lowered level of polygalacturonase isoform 1 is disclosed. This method begins with the step of isolating a DNA sequence encoding at least a portion of the polygalacturonase beta-subunit. This portion is sufficient to hybridize effectively to the mRNA of the polygalacturonase beta-subunit in vivo. A genetic construction is created from the cDNA clone in which the cDNA clone is positioned so that the antisense version of the polygalacturonase beta-subunit message may be produced from the clone. A tomato cell is transformed with the construction, whereby the tomato cell produces in the fruit a lowered level of PG beta-subunit and, hence, lowered levels of polygalacturonase isoform 1.