The Golgi apparatus is described as receiving, modifying, and packaging proteins from the rough ER. Which plant-related function is attributed to it?

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The Golgi apparatus processes and ships secretory products, and in plant cells it specifically handles the synthesis and export of cell wall components. After rough ER makes proteins, the Golgi adds carbohydrates to form cell wall polysaccharides such as pectins and hemicelluloses, packages them into vesicles, and delivers them to the plasma membrane to be incorporated into the cell wall. This plant-specific role fits the function described, whereas chloroplast synthesis, ribosome production, and sugar storage occur in other organelles or locations (plastids, nucleus, vacuole/cytosol).