Sieve plate callose. A factor in blockage of axial phloem transport.
D001692:Biological Transport; D002245:Carbon Dioxide / Q000494:pharmacology; D002247:Carbon Isotopes; D003368:Gossypium / Q000502:physiology*; D011134:Polysaccharides / Q000378:metabolism*
D002247:Carbon Isotopes; D011134:Polysaccharides; D002245:Carbon Dioxide