Asian Journal of Research in Biosciences
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Age Determination of Nemipterus japonicus in Tha-baw-seik, Myanmar Using of Sagitta Otolith and Scales Rings
Get PDFA total 400 numbers of Nemipterus japonicus were randomly collected in Tha-baw-seik landing area from 2018 January to 2018 December. After that, the samples were taken out their sagitta otoliths and scales and examined their yearly rings. Among them, 356 numbers were reliably used for age determination. In the present study, it was found that the maximum age was found 5+ years old for pooled fish with SL = 23.14 cm and the youngest one was 1+ year old for a female specimen with SL = 12.72 mm. Moreover, it could be concluded that N. japonicus has medium longevity and the highest growth length rate can be at the first and second age group. The present study will absolutely provide for further stock assessment studies in Myanmar because it was the first study about age determination of N. japonicus
Effects of Silicon on the Yield and Cadmium Accumulation of Rice Grain
Get PDFIn order to investigate the effects of silicon (Si) on the yield and cadmium (Cd) concentrations of rice grain, pot soil experiments were conducted with two rice cultivars differing in Cd accumulation, and different Si application levels (low, medium and high) and different Si application methods (one time and two times) were designed. The results showed that the grain yields of Yangdao 6 (high grain Cd accumulator) were raised by 4.81% - 11.94% by the Si applications, compared to the control, and that of Yu 44 (low grain Cd accumulator) were raised by 1.98% - 9.94%. The grain Cd concentrations of Yangdao 6 were reduced by 22.22% - 73.08%, and that of Yu 44 were cut by 28.57% - 68.24%, by the Si applications. With the rises of Si application levels and Si application times, the grain yields increased but the grain Cd concentrations decreased sharply. The effects of Si applications on grain Cd concentrations were much higher than on grain yields. The results indicate that grain Cd concentration can be reduced by about 70%, and grain yield can be raised by about 10%, by the Si application measure of high level and two times during rice growth period
Investigation Potential Biomonitors of Some Elements (Zn, Cr, Cd, Pb, Ni, Fe, Cu) Verbascum insulare Boiss. and Heldr. (Scrophulariaceae) from East Anatolia Turkey
Get PDFIn this study, heavy metals such as Zn, Cr, Cd, Pb, Ni, Fe and Cu were investigated in Verbascum insulare Boiss. & Heldr. (Scrophulariaceae) as well as in soil grown by using ICP-OES. The aim of this study was to examine the potential of biomonitors for heavy metal polluted areas. The plant and soil samples were collected from their natural habitat at different locations in 2017. In the whole plant, Cr among all heavy metals was found to be at the highest level of 140,55 mg/kg, followed by Pb 63,70 mg/kg and Fe 57,30 mg/kg, while the other metals were at low concentration in V. insulare Boiss. & Heldr. The obtained data were compared with the respective values recommended by the polish standards. Our findings were tested with one-way ANOVA Duncan tests for high significance levels of P<0.01. We found the plants to be reliable biomonitors for remediation methods. The present study showed that heavy metals such as Zn, Cr, Cd, Pb, Ni, Fe and Cu were found in the three locations, and the overall levels of metals were in the order of Aşkale (L3) > Çat (L2) > Palandöken Mountain (L1). V. insulare might be suitable for remediation of Cr-, Pb- and Fe-contaminated soils. This plant can be used as a bioindicator and a biomonitor for polluted heavy metals
Rapid in vitro Propagation of Physalis angulata: A Valuable Medicinal Plant
Get PDFLeaf and internodal explants of Physalis angulata L. were used to evaluate the effect of growth regulators on the in vitro callus induction and plant regeneration. Two independent experiments were performed to establish callus and plant regeneration. In the first experiment leaf segments 0.5mm were cultured on MS basal medium fortified with (BAP (0.5-4.0 mg/l) + 2, 4-D (0.0-1.5 mg/l). Callus initiation was observed best in all media after 12-16 days. Highest callus growth in terms of 11.75% Yellowish Green Friable Callus (YGFC) was observed in MS medium fortified with 2, 4-D 1.0 mg/l and BAP 2.0 mg/l. In the second experiment internodal segments 0.5 mm were cultured on MS medium containing BAP (0.5-4.0 mg/l) + IAA (0.5-3.0 mg/l) + KIN (1.0 -3.0 mg/l) and 2, 4-D (0.5-3.0 mg/l). The best response of shoot induction was observed with internodal cultured onto MS medium containing BAP (2.0 mg/l) + KIN (1.0 mg/l) and IAA (1.0 mg/l) showed the mean value 14 Number of shoots per explant. Excised shoots were transferred to rooting medium containing different concentrations of IBA, IAA and NAA for root induction. The roots were initiated and well developed on a medium fortified with 0.5-5.0 mg/l of both the auxins. Of the three auxins tested, a number of roots were produced on the medium containing IBA. Maximum numbers of 35 roots per shoot were produced in 35 days on MS medium supplemented with 3.0 mg/l IBA. The well-rooted plantlets were transplanted to the paper cup for hardening and the well-established plants were transferred to the field for acclimatisation
Biological Removal of Cadmium by Halomonas elongate IBRC-M10433 in Different Conditions: Optimization by Taguchi Statistical Approach
Get PDFThe biological removing method is cheap and safe for the environment. The Cadmium is toxic and harmful for the environment; therefore, the biological removing programs were developed for deletion of this metal from waste. Detection of persisting bacteria to toxic metals and using them for removing heavy metal from arouses environments and wastewaters is very important. In this study the ability of Halomonas elongate IBRC-M10433 bacterium was achieved from Urmia Salt Lake was tested to remove of Cadmium in wastewaters. For achievement optimised of different environmental factors such as Cadmium, Glucose and salt for removal of Cadmium from H. elongate IBRC-M10433, we used Taguchi method. Results from this study showed that H. elongate IBRC-M10433 persists to Cadmium metal. The largest Cadmium removal (85%) was seen in the culture that contains 50 ppm Cadmium, Glucose 10 g/L and NaCl 200 g/L