Secretion of Amylase by Plant Roots

Redistribution of amylase activity accompanying its secretion by the pancreas.

Amylase activity in several tissue and body fluid compartments in the rat changed markedly when the secretion of digestive enzyme was augmented over a 3-hr period with a cholinergic agonist. As a result of stimulation, the pancreas was depleted of about one-third of its amylase activity and accounted for only 75% of the amount recovered from the animal, compared to 92% in the fasted state. Desp...

Plant gene expression by the roots

Nerve cells are complex cells with highly specialized functions. Not only are nerve cells from different regions of the nervous system functionally heterogeneous, but each individual cell also contains distinct regions that perform specific functions. Consequently, the nerve cell soma, dendrites and axons all express different proteins that are required for the specific tasks they perform, maki...

Analysis of a model of phosphorus uptake by plant roots

In this paper, we consider a model of phosphorus uptake by plant roots, governed by a quasilinear parabolic equation. We first study the well-posedness of the associated Cauchy problem. Then, we consider a shape optimization problem: how to deform the shape of the root in order to increase phosphorus uptake. Finally, we give some numerical results of the shape optimization process.

Loss of Phosphorus-32 by Plant Roots after Foliar Application.

Cosecretion of protease inhibitor stabilizes antibodies produced by plant roots.

A plant-based system for continuous production of monoclonal antibodies based on the secretion of immunoglobulin complexes from plant roots into a hydroponic medium (rhizosecretion) was engineered to produce high levels of single-chain and full-size immunoglobulins. Replacing the original signal peptides of monoclonal antibodies with a plant-derived calreticulin signal increased the levels of a...