a carbohydrate in plant cells that plugs the sieve pores when the sieve tubes stop functioning
Origin of callosefrom Classical Latin callosus, callous
A complex branched carbohydrate commonly associated with sieve areas of sieve elements.
Origin of calloseFrom Latin callōsus callous ; see callous .
- (biochemistry) A plant polysaccharide comprising glucose residues linked together through β-1,3-linkages, produced chiefly in response to wounding and infection.