Characterization of the stomatal apparatus in monosomic lines of Chinese spring wheat

Influence of the absence of some chromosomes on such characters as the numb er of stomata per unit area of the leaf, distance between stomata in a row, distance between rows, and stoma length and width was investigated. The st udy was carried out on the pre-flag leaves of Chinese Spring common wheat l ines monosomic for all chromosomes of genomes A, B, and D. A disomic line o f this cultivar was used as a control. It was found that in the monosomic l ine 5A, the number of stomata on the upper and the lower side of the leaf w as 71.1% and 46.6%, respectively, from the control values. Similar effects were found in lines ms 1D and ms 4D. The absence of chromosomes from ms 7A and ms 6D produced the greatest effect on the linear size of stomata. The c haracter "distance between stomata" had the highest coefficient of variatio n (up to 154%); for the characters "stoma length and width," this coefficie nt did not exceed 12%.