Leaf Anatomical Characteristics in Relation to Grain Yield of Wheat ( Triticum aestivum L.) Cultivars
An experiment was carried out to study the variability of leaf anatomical characters of wheat ( Triticum aestivum L.) cultivars and their association with grain yields. Results indicated that in most of the cases cultivar differences were significant. In respect of 6th leaf anatomical characters, simple correlation coefficients indicated that most of the leaf anatomical traits had significant negative relation with grain yield whereas in respect of flag leaf anatomical traits, only the association between radial dimension of big xylem vessel and grain yield was significantly negative and the correlation between number of veins and grain yield was significantly positive. Key words: Leaf anatomy, wheat, yield, correlation Â  doi: 10.3329/jbs.v15i0.2156 Â  J. bio-sci. 15: 153-158, 2007
EFFECT OF TEMPERATURE DURING GROWTH ON LEAF ANATOMY AND SUBSEQUENT LIGHT‐SATURATED PHOTOSYNTHESIS AMONG CONTRASTING LOLIUM GENOTYPES
Summary 
The effect of temperature during growth of ten Lolium genotypes from contrasting populations on subsequent light-saturated photosynthesis and on leaf mesophyll and stomatal characteristics was examined. Most genotypes grown at 9° and 15° C had faster rates of photosynthesis at 15° than those grown at 21° C. Photosynthetic activity at 21° C was also greater when plants were grown at 15° Compared with 21° C. This temperature effect was not associated with changes in the observed mesophyll or stomatal characteristics. Plants grown at 21° usually had smaller mesophyll cells than those grown at 15° C. Among plants grown at 9° and 15° C, and among those grown at 21° C, light-saturated photosynthesis was negatively correlated with mesophyll cell size.
Effect of Various Environments on the Anatomy and Growth of Perennial Ryegrass and Cocksfoot
Summary Plants of Lolium perenne and Dactylis glomerata were grown in combinations of 100, 80, and 20% of full daylight, and mean day temperatures of 10.6, 15.2, and 20.5°c. Half the plants of each species were defoliated at transfer to experimental conditions. At harvest, the upper portion of the main tiller with attached leaf bases was fixed and sectioned longitudinally. Apical meristem diameters were measured at all leaf insertions from the apex to that of the youngest mature leaf. Defoliation reduced diameters of the apical column and sub-apical region and also reduced the height of the apical column and the number of leaf pri-mordia on it. The apex diameter was unaffected. Differences in light intensity or temperature had a minor and variable effect on the quantities measured. Differences in diameter at leaf insertions at the base of the column and at the top of the sub-apical region appeared to be a consequence of differences in cell number. It was concluded that the size of the sub-apical region pe...