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
Morphological and Anatomical Responses of Four Wheat Cultivars to Water Stress
Apot experiment was conducted in greenhouse station, Biology department, Science college, Salahhadin University to study the effect of three drought periods (0, 7, 14, and 21 days) on four soft wheat cultivars (Amede, Aksad, Florkwa and Aras) under three water stress conditions. Factorial Completely Randomized Designs were used with four replication for each treatment and the means were compared using least significant difference test. Morphological and yield characteristics, treatments significantly decreased plant height, tiller numbers, flag leaf length and width, spikes length, spikes number, weight of 100 grains and dry weights of the plants for all cultivars. While for anatomical characteristics treatments significantly increased cuticle thickness, xylem diameter and upper epidermis for all cultivars and lower epidermis only for Asked cultivar and decreased phloem diameter and stomata numbers as compare to control.
ptimizing the usability of unwanted latex yield by in situ epolymerization and functionalization
Functionalized liquid natural rubber (FLNR) derived from unwanted latex yield was synthesized by redox method using hydrogen peroxide (H2O2) in the presence of sodium nitrite (NaNO2). Hydroxylation was confirmed by FTIR with a peak at 3424 cm−1. Response surface methodology was used to investigate the effect of varying feed parameters towards response of molecular weights and OH values. Response surface contours were constructed for modeling the relationship between processing factors and response unctionalized liquid natural rubber