a carbohydrate in plant cells that plugs the sieve pores when the sieve tubes stop functioning
Origin of callose; from Classical Latin callosus, callous
A complex branched carbohydrate commonly associated with sieve areas of sieve elements.
Origin of calloseFrom Latin call&omacron;sus, 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.