Sieve plate callose. A factor in blockage of axial phloem transport

@article{McNairn1967SievePC,
  title={Sieve plate callose. A factor in blockage of axial phloem transport},
  author={R. B. McNairn and H. B. Currier},
  journal={Naturwissenschaften},
  year={1967},
  volume={54},
  pages={591-591}
}