Abstract

CELL WALL STRUCTURE AND RIPENING-ASSOCIATED CHANGES .. ......... 676 Cellulose 677 Hemicellulose 678 Pectin .... ........ 679 Other Cell Wall Components 681 CELL WALL HYDRO LASES ....... ....... 681 Polygalacturonase .. , .. .. ..... ... .. ... .. ...... .. 682 Pectinmethylesterase..... ......... .. .. 686 Cx-Cellulase ......... 687 Other Cell Wall Hydrolases 688 CELL WALL HYDROLASE FUNCTION DURING FRUIT RIPENING 689 Physical. Genetic. and Biochemical Modification of Cell Wall Hydrolase Activity 689 Molecular Genetic Modification of Cell Wall Hydrolase Activity . 690 FUTURE PROSPECTS .. .. ... .. .. .. ........ .. ...... .. 695