Sucrose metabolism for cellulose biosynthesis in colored cotton fibers

Assays were conducted to examine the contents of cellulose and callose,and the activities of enzymes related to sucrose metabolism at various stages of fiber development in colored cottons and white cotton. the results showed that the cellulose accumulation could be described with richard curve equations,and the cellulose biosynthesis was reflected by the eigenvalues,especially the maximum biosynthesis rate (vmax) and the time taken for cellulose rapid biosynthesis (t). the period from 20 days post anthesis (dpa) to 40 dpa is the key stage for cellulose accumulation in colored cotton. during this period reduced activity acid invertase (ai) and β-1,3-glucanase,and decreased accumulation and transformation of callose in colored cotton might limit carbon supply and cellulose accumulation by affecting vmax and t,thus inhibiting sucrose metabolism during cellulose biosynthesis,then results in poor fiber quality. © 2017,university of agriculture. all rights reserved.