JB-VOLUME 02 ISSUE 01 MARCH 2014


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Volume 2 Issue 1, March 2014

Journal of Biology

ISSN

2052-0751

Publication Frequency

6 Issues per year

Pages

1-24

Publication History


Original Articles

Capability of the CERES-Barley Model for Prediction of Barley Varieties Growth under Deficit Irrigation

Zeinab Fatemi, Farzad Paknejad, Ebrahim Amiri and Mohammad Nabi Eilkaee

Pages 1-7


Plant Growth Promoting Rhizobacteria as a Source of Phytohormones for the Growth and Yield of Cereal Crops

Midrarullah, Bashir Ahmed and M.Sajjad Mirza

Pages 8-13

Diversity of Parasitoids Collected in an Area of ​​Forest and Pastures in Southern of Goiás, Brazil

Carlos Henrique Marchiori

Pages 14-17

Effects of Daily Added Coenzyme Q10 on Certain Haematological and Biochemical Parameters in Elite Endurance Skiing Athletes
N. Demirci
Pages 18-24


Title

Capability of the CERES-Barley Model for Prediction of Barley Varieties Growth under Deficit Irrigation

Abstract

Crop simulation models are widely used for optimizing crop production management. To evaluate the performance of CERES (Crop Environment Resource Synthesis)-barley model on five barley cultivars, a split- plot experiment based on a randomized complete block design with four replications was done at Research Field of Faculty of Agriculture and Natural Resources, Islamic Azad University-Karaj Branch, Karaj, Iran, during 2010-2011. Two levels of irrigation and five barley cultivar were arranged in main plots and sub-plots, respectively. During the growing season, dry matter and leaf area index is continuously measured and model was calibrated regarding the obtained results. Evaluation analysis showed that Root Mean Square Error (RMSE) estimated for dry matter and grain yield were 2484 and 483 kg ha-1 under optimal irrigation conditions, respectively. CERES-barley model predicted LAI (Leaf Area Index) satisfactorily as well. CERES-barley model provided very satisfactory estimates, so that R2 for stress conditions between observed and predicted dry matter and LAI was 0.95 and 0.88, respectively. With respect to satisfactory simulations of CERES-barley model, this model can be used for the research purposes and management programs in Karaj region.

Keywords

Barley, CERES-Barley Model, Grain Yield

Title

Plant Growth Promoting Rhizobacteria as a Source of Phytohormones for the Growth and Yield of Cereal Crops

Abstract

The present study was conducted to isolate and characterize Plant Growth Promoting Rhizobacteria (PGPR) and to assess their ability for phytohormones production and nitrogen fixing. A total of 21 bacterial strains were isolated from roots and rhizosphere of rice. On the basis of colony and cell morphology, 4 strains were identified as Azospirillum brasilense, 11 as Pseudomonas strains and three strains remained un-identified. With the exception of 3 strains, all isolates showed IAA production in pure culture. Out of the total strains tested, 18 produced phytohormone (IAA), which is the principal naturally occurring auxin. Production of IAA was higher in R4-1 strain with 45.6 µg/mL, followed by R2 with 45.5 µg/mL and MRSWT6 with 35.8 µg/mL of IAA respectively. Pseudomonas Ky1 also produced higher amount (32.5µg/mL) of IAA. Out of the total bacterial strains tested for ARA, 14 strains were ARA positive while the rest 6 strains were ARA negative. The overall nitrogenase activity varied between 21.5 n moles C2H4/mg protein/hr to 890.65 n moles C2H4/mg protein/hr. Highest specific activity was observed in case of isolate R4-1 which was found to be 890.65 n moles C2H4/mg protein/hr followed by bacterial isolate R2 and R3-2 with 641.98 n moles C2H4/mg protein/hr and 370.23 n moles C2H4/mg protein/hr respectively .The strains producing high amounts of IAA and nitrogenase activity have a great potential for use as PGPR for large scale production of inoculum for cereal crops.

Keywords

Azospirillum, Pseudomonas, Phytohormones, IAA, ARA

Title

Diversity of Parasitoids Collected in an Area of ​​Forest and Pastures in Southern of Goiás, Brazil

Abstract

The large number of parasitic Hymenoptera, combined with their ability to respond to the population densities of their hosts, is essential for maintaining the ecological balance and is a force that contributes to the diversity of other organisms. The objective of this study was to investigate the diversity of parasitoids collected in areas of native forest and grassland in Itumbiara, southern Goiás, Brazil. The samples of insects were obtained using yellow buckets of approximately 30 cm in diameter and 12 cm in height, in which was placed a mixture of 2 liters of water, 2 ml of detergent and 2 ml of formaldehyde. From this, 793 parasitoids were caught in 480 collections made in remnant native forest and pasture over a 12-month period, of which 45.9% were collected in the forest and 54.1% in pastures. The most frequent species of the family Braconidae was Bentonia longirconis (van Achterberg), accounting for 27.5%; in the family Diapriidae, it was Trichopria anastrephae Costa Lima with 99.1%; in the family Figitidae, it was Zaeucoila sp. with 50.0% and in the family Pteromalidae, it was Spalangia cameroni Perkins with 90.0%. The most abundant species was T. anastrephae, accounting for 41.8% of the individuals collected. The diversity index (D) for the species of parasitoids was higher in pasture (D = 0.22) than in the forest (D = 0.20).

Keywords

Insecta, Hymenoptera, Yellow Buckets, Diversity

Title

Effects of Daily Added Coenzyme Q10 on Certain Haematological and Biochemic-al Parameters in Elite Endurance Skiing Athletes

Abstract

The present study aims to examine the effects of orally administered coenzyme Q10 (CoQ10) supplement on certain haematological and biochemical parameters in regularly exercising elite endurance athletes. The study subjects were divided into three groups, namely the control group (n = 5) and two subject groups taking 100 mg (n = 5) and 200 mg (n = 5) CoQ10. The blood samples thus collected were utilized for the measurement of certain haematological and biochemical parameters and CoQ10 levels. In the present study, regular exercise and administration of 100 mg and 200 mg of CoQ10 led to an increase in MCV, MCHC and HGB levels (p<0.05 and p<0.01, respectively) and a decrease in WBC. In addition, significant increases were identified in the AST and ALT levels of the control group when compared to the trial groups (p<0.01), while an increase was also observed in glucose and Creatin in the group taking 200 mg of CoQ10 (p<0.05). When the pre- and post-exercise results in CoQ10 levels were compared, increases were determined in the CoQ10 levels of trial groups using 100 mg and 200 mg of CoQ10 (p<0.05 and p<0.01, respectively). Consequently, certain haematological and biochemical parameters are considered to potentially increase or decrease as a result of a physical exercise-related enhancement in metabolic activity, in oxygen consumption and thus, in the formation of reactive oxygen species. Therefore, the administration of CoQ10 can be argued to be effective on blood parameters and to support the antioxidant defence system.

Keywords

Exercise, Coenzyme Q10, Skiing Athlete, Haematological and Biochemical Parameters