M Reza Hadi - Academia.edu (original) (raw)

Papers by M Reza Hadi

Page 1. African Journal of Biotechnology Vol. 8 (11), pp. 2429-2431, 3 June, 2009 Available onlin... more Page 1. African Journal of Biotechnology Vol. 8 (11), pp. 2429-2431, 3 June, 2009 Available online at http://www.academicjournals.org/AJB ISSN 1684–5315 © 2009 Academic Journals Mini Review Biotechnological potentials of Seidlitzia rosmarinus: A mini review MR Hadi ...

This study was carried out to evaluate the effects of pot size, planting date and type of genotyp... more This study was carried out to evaluate the effects of pot size, planting date and type of genotype on mini-tuber production of Marfona potato cultivar (Solanum tuberosum L.) in greenhouse conditions. Four genotypes (M-129, M-128P, M-127P and M-124P) originated from virus free sprouts and a genotype of the same cultivar (Marfona) originated from apical meristem, in 3 sizes of pot and 3 planting date were investigated. The results showed that using larger pots of 3-liter has no advantage and pots smaller than 2-liter is not suitable for mini-tuber production. Also, time of Nov 18 was the best of date for planting of potato in studied conditions and delay in date of planting reduced the mini-tuber production. The reduction in number of mini-tubers and growing period was greater for the genotype M-129 compared with the other potato genotypes. Furthermore, higher numbers of mini-tubers were produced by the M-127P and M-124P genotypes and M-127P had the highest total weight of mini-tubers. However the number of mini-tubers per plant was higher for genotypes originated from meristem culture than genotypes obtained from sprouts. It seems that genotypes originated from potato sprouts are not as efficient as the apical meristem ones. On the other hand, later genotype showed more homogenous in growth rate and phenotype.

This study was carried out to evaluate the effects of four nitrogen treatments (50, 100, 150 and ... more This study was carried out to evaluate the effects of four nitrogen treatments (50, 100, 150 and 200 Kg urea / ha) on biomass, crude protein, soluble carbohydrates and crude fiber contents in three fodders (corn, sweet sorghum and sweet sorghum bagasse) at the filed experimental station. The results showed the effects of nitrogen treatments and fodders on the above measurements were significant. Treatment of 200 kg/ha urea had the highest biomass (64.80 t/ha) and protein content (8%) and it had the lowest soluble carbohydrates (12.80 %) and fiber contents (31.90%). Between fodders, corn had higher biomass and protein content (72.80 t/ha, 7.10 %) than sweet sorghum (66.50 t/ha, 5.90 %), respectively. Also both carbohydrate and fiber contents of sweet sorghum was higher than corn. Sweet sorghum bagasse had lower crude protein and carbohydrates content and higher crude fiber than both corn and sweet sorghum. In fodders as the nitrogen fertilizer increased, crude protein present increased while crude fiber present decreased which could increase palatability and digestibility of the both species. Thus, base on the results, it is suggested to apply 200 kg/ha urea for corn and sweet sorghum.

The consumption of bioethanol as biofule may reduce greenhouse gases, gasoline imports. Also it c... more The consumption of bioethanol as biofule may reduce greenhouse gases, gasoline imports. Also it can be replaced with lead or MTBE (Methyl tert-butyl ether) that are air and underground water pollutants, respectively. Plants are the best choice for meeting the projected bioethanol demands. For this scope, a comparative analysis of the technological options using different feedstocks should be performed. Our research and other studies indicate that sweet sorghum can be used as a feedstock for ethanol production under hot and dry climatic conditions. Because, it has higher tolerance to salt and drought comparing to sugarcane and corn that are currently used for biofuel production in the world. In addition, high carbohydrates content of sweet sorghum stalk are similar to sugarcane but its water and fertilizer requirements are much lower than sugarcane. Also, sugarcane is not a salt tolerant plant. On the other hand, high fermentable sugar content in sweet sorghum stalk makes it to be more suitable for fermentation to ethanol. Therefore, it is suggested to plant sweet sorghum for biofule production in hot and dry countries to solve problems such as increasing the octane of gasoline and to reduce greenhouse gases and gasoline imports.

Biotechnology and Bioprocess Engineering, 2008

In this study, carotenoid and glycerol production in two unicellular green algae (Dunaliella sali... more In this study, carotenoid and glycerol production in two unicellular green algae (Dunaliella salina and D. viridis) isolated from the Gave-Khooni salt marsh grown in media containing five different salt concentrations (0.17, 1, 2, 3, and 4 M NaCl) were evaluated under sterile conditions. Algae growth decreased as the medium salinity increased. Optimum growth of D. salina and D. viridis were obtained at 2 and 1 M NaCl, respectively. As salinity increased, glycerol and carotenoid production were increased in D. salina, whereas lower values for these products were produced in D. viridis under the same conditions. Furthermore, the cell color of D. salina changed from green to orange-red following accumulation of carotenoid, but the color of D. viridis was not changed. Thereby, it seems that the Iranian D. salina may be suitable for carotenoid production (betacarotene) on a large scale. In addition, since carotenoid compounds enhance the efficiency of photosynthesis and glycerol synthesis, it appears that the pathway for glycerol production and mechanisms of salt tolerance in D. viridis are unique from those of D. salina.

Biotechnology and Bioprocess Engineering, 2008