How to get PO Text to MRP generated PRs

Hi Seniors,

We are maintaining purchase order texts in Material Master purchase order text.

These text's are not getting automatically adopted to MRP generated purchase requistions.

But while creating manual purchase requistions, the purchase order text's are getting automatically adopted to material po text in purchase requistion.

This is not happening for MRP generated purchase requsitions.

Is there any configuration for this requirement. Could anybody throw some light.

Thanks to everyone in advance.