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Plant Physiology 90:17-20 (1989)
© 1989 American Society of Plant Biologists

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Development and Growth Regulation

Immunocytolocalization of Polygalacturonase in Ripening Tomato Fruit 1

Denise M. Tieman and Avtar K. Handa

Center for Plant Environmental Stress Physiology, Purdue University, West Lafayette, Indiana 47907, Department of Horticulture, Purdue University, West Lafayette, Indiana 47907

Using tissue blotting and immunocytolocalization, we have investigated the appearance and accumulation of polygalacturonase (PG) during tomato (Lycopersicon esculentum Mill.) fruit ripening. Results show that PG first appears in the collumella region followed by sequential appearance in the exopericarp and endopericarp, respectively. Detectable levels of PG were not present in the locular material containing seeds. This result indicates that PG synthesis initiates at the central collumella region of tomato fruit during ripening.

1 Research supported by the Purdue University Agricultural Experimental Station. Journal paper No. 11,826 of the Purdue University Agricultural Experimental Station.






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Copyright © 1989 by the American Society of Plant Biologists