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. 1991 Sep;3(9):963–972. doi: 10.1105/tpc.3.9.963

Abscisic Acid Mediates Wound Induction but Not Developmental-Specific Expression of the Proteinase Inhibitor II Gene Family.

H Pena-Cortes 1, L Willmitzer 1, JJ Sanchez-Serrano 1
PMCID: PMC160063  PMID: 12324624

Abstract

The expression of the potato and tomato proteinase inhibitor II (pin2) gene family is subject to both developmental and environmental control, being constitutively expressed in potato tubers while only being present in the foliage of the potato or tomato plants after mechanical damage. There is evidence that the phytohormone abscisic acid (ABA) is involved in this wound induction of pin2 gene expression. This paper describes experiments that demonstrate that ABA is able to induce the expression of the pin2 gene family, both locally and systemically, at physiological concentrations. The significance of the ABA involvement in the pin2 induction upon wounding has been further strengthened by analyzing the expression of a pin2 promoter-[beta]-glucuronidase gene fusion in transgenic ABA-deficient mutant potato plants. We have analyzed the developmental regulation of pin2 gene expression in wild-type and ABA-deficient potato and tomato plants. The pin2 mRNA level is identical in mutant and wild-type parental Solanum phureja tubers. In addition, evidence is presented for pin2 also being constitutively expressed at certain stages in the development of both tomato and potato flowers. Again, the ABA deficiency appears to have little influence in this tissue-specific expression in the mutants. These results suggest the action of separate pathways for the developmental and environmental regulation of pin2 gene expression.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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