Fuente: WIPO "tomato" A method of treating a fibrous pulp, such as a papermaking pulp, is provided. The fibrous pulp includes fibers having one or more of an aldehyde group, an aromatic group, a carboxyl group, a hydroxyl group, or a ketone group, present as surface terminated groups or end groups, and optionally one or more of an amino group, a halogen group, a nitrile group, a nitro group, a sulfhydryl group, or a sulfonate group, and one or more polymers having an aldehyde group, an amino group, an aromatic group, a carboxyl group, a halogen group, a hydroxyl group, a ketone group, a nitrile group, a nitro group, a sulfhydryl group, or a sulfonate group. The method involves combining, with the fibrous pulp, a stitching enzyme configured to enzymatically, covalently bond together, the fibers and/or to enzymatically, covalently bond together the fibers and the one or more polymers. The method can further involve combining the pulp with an alpha-glucan enzyme that is designed to enzymatically, covalently bond monomers together to form the one or more polymers. A reactive fiber pulp is also provided that includes fibers, such as papermaking fibers, having an aldehyde group, an amino group, an aromatic group, a carboxyl group, a halogen group, a hydroxyl group, a ketone group, a nitrile group, a nitro group, a sulfhydryl group, or a sulfonate group, one or more polymers having an aldehyde group, an amino group, an aromatic group, a carboxyl group, a halogen group, a hydroxyl group, a ketone group, a nitrile group, a nitro group, a sulfhydryl group, or a sulfonate group, a stitching enzyme, and optionally a sizing enzyme.