... growing pollen cell wall (Loewus and Labarca, 1973). Laminarin, a linear glucan containing mainly &D-( 1-3) linked glucose, with some p-~-(1+6) branching points, is found in Laminaria, ... wild- type recombinants by staining the pollen with iodine reagent (Wx pollen, containing normal starch, stains black; wx pollen, lacking amylose, stains red) and, by counting the frequency ... Juana Tandecarz and Carlos Cardini, mentors in science and in life, who were sadly lost too early. ADVANCES IN FOOD AND NUIRITION RESEARCH. VOL. 41 OCCURRENCE OF STARCH I. INTRODUCTION...