Abstract
Polygalacturonase-inhibiting protein (PGIP) is a cell wall protein which inhibits fungalendopolygalacturonases. A small gene family encodesPGIP in the genome of common bean, as indicated by Southernblot experiments performed at high-stringency conditions. Southern-blot analysis of DNA extracted from different cultivars ofPhaseolus vulgaris and fromPhaseolus coccineus showed length polymorphism of the hybridizing restriction fragments. The cytological localization of thePGIP genes was determined in polytene chromosomes of theP. vulgaris embryo suspensor cells. In-situ hybridization experiments using the clonedPGIP gene revealed labelling over a single region of the pericentromeric heterochromatin of chromosome pair X, next to the euchromatin, suggesting thatPGIP gene family may be clustered in one chromosomal region.
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Communicated by F. Mechelke
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Frediani, M., Cremonini, R., Salvi, G. et al. Cytological localization of thePGIP genes in the embryo suspensor cells ofPhaseolus vulgavis L. Theoret. Appl. Genetics 87, 369–373 (1993). https://doi.org/10.1007/BF01184925
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DOI: https://doi.org/10.1007/BF01184925