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Mutagenic Effect of Ethyl Methane Sulfonate on Some Fiber Species 甲烷磺酸乙酯对某些纤维品种的诱变作用
Pub Date : 2024-03-12 DOI: 10.3329/bjnag.v37i2.71777
NB Atiq, MS Haque, Mma Noor, SA Sammy, M. Perves, S. Khanam
Jute, kenaf and mesta are prominent fibrous plants with significant industrial and nutritional value for optimization of their cultivation process can have substantial agricultural and economic implications. The study was conducted on exploring the impact of ethyl methane sulfonate (EMS) presoaking treatments on the germination and the sensitivity of fiber crops to mutagens. This research aimed to evaluate the germination potential of jute, kenaf and mesta variety using various concentrations of EMS presoaking treatments, and analyze the sensitivity and induced variability in the M1 generation. Seeds were presoaked in four different concentrations of EMS. The subsequent parameters, including germination, root length, and shoot length, were measured at three crucial growth stages: 12, 24, and 36 days after sowing (DAS). A probit analysis was conducted to determine the LD50 value, which signifies the concentration at which 50% of the population exhibits an adverse effect. Moreover, significant variances were detected in germination rates, root elongation, and shoot growth across the different presoaking treatments. The findings emphasize the sensitivity of these fibrous plants to EMS concentrations, with increasing concentrations having a detrimental effect on growth parameters. This information can be instrumental for breeders and agriculturists looking to optimize germination in these crops.Bangladesh J. Nuclear Agric, 37(2): 19-27, 2023
黄麻、槿麻和苎麻是重要的纤维植物,具有重要的工业和营养价值,优化其种植过程会对农业和经济产生重大影响。本研究旨在探索甲烷磺酸乙酯(EMS)预浸泡处理对纤维作物发芽的影响以及纤维作物对诱变剂的敏感性。这项研究旨在评估黄麻、剑麻和马缨丹品种在不同浓度的 EMS 预浸泡处理下的发芽潜力,并分析 M1 代的敏感性和诱导变异性。用四种不同浓度的 EMS 对种子进行预浸泡。在三个关键生长阶段测量了随后的参数,包括发芽率、根长和芽长:播种后 12、24 和 36 天(DAS)。通过 probit 分析确定了半数致死剂量(LD50)值,即 50%的种群出现不良反应的浓度。此外,在不同的预浸泡处理中,发芽率、根系伸长率和嫩枝生长率都存在明显差异。研究结果强调了这些纤维植物对 EMS 浓度的敏感性,浓度越高对生长参数越不利。这些信息对育种者和农业专家优化这些作物的发芽率很有帮助:19-27, 2023
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引用次数: 0
Clay minerals identification by x-ray powder diffraction near a mining site, Malaysia 利用 X 射线粉末衍射技术识别马来西亚矿区附近的粘土矿物
Pub Date : 2024-03-12 DOI: 10.3329/bjnag.v37i2.71786
KS Arefin, Mmh Sohag
The soil samples collected from an agricultural region near the Sungai Chalit mine site in Raub, Pahang, Malaysia were subjected to X-ray powder diffraction (XRPD) analysis for the first time. The PanAnalytikX’pert Pro XRD equipment at the XRD laboratory, Material Technology, Nuclear Malaysia, was used to identify the clay minerals present in the samples. After thorough analysis of all samples, it has been determined that microcline is found in every sample, whereas bytownite has been detected in just three unique samples (DS2, DS15, and DS17). Two discrete variants of zeolite were discerned in two specimens, denoted as DS2 and DS17. Sample DS6 contains kaolinite. Sample C13 comprises four clay minerals: microcline, anorthite, birnessite, and tremolite. The occurrence of microcline in soil signifies the erosion of rocks abundant in feldspar, such as granite, resulting in a reduction of essential minerals like potassium and calcium. This depletion has the potential to affect plant nutrition and crop yield.Bangladesh J. Nuclear Agric, 37(2): 121-133, 2023
从马来西亚彭亨州劳布 Sungai Chalit 矿区附近的农业区采集的土壤样本首次进行了 X 射线粉末衍射 (XRPD) 分析。马来西亚核能材料技术公司 X 射线衍射实验室的 PanAnalytikX'pert Pro X 射线衍射设备被用来鉴定样品中的粘土矿物。在对所有样品进行彻底分析后,确定每个样品中都含有微云母,而仅在三个独特的样品(DS2、DS15 和 DS17)中检测到了白云石。在 DS2 和 DS17 这两个样本中发现了沸石的两种离散变体。样品 DS6 含有高岭石。样品 C13 含有四种粘土矿物:微晶石、阳起石、透闪石和透闪石。土壤中出现微晶石表明,花岗岩等富含长石的岩石受到侵蚀,导致钾和钙等必需矿物质减少。这种消耗可能会影响植物营养和作物产量:121-133, 2023
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引用次数: 0
Evaluation of Postharvest Behaviour of Bitter Gourd as Influenced by Gamma Irradiation and Modified Atmosphere Packaging 评估伽马辐照和气调包装对苦瓜采后行为的影响
Pub Date : 2024-03-12 DOI: 10.3329/bjnag.v37i2.71780
MM Rashid, N. Akhther, MR Hassan, MR Islam, LB Rafiq
An experiment was conducted at the Postharvest Laboratory of Horticulture Division, Bangladesh Institute of Nuclear Agriculture during November to December 2022to examine the effects of different doses of gamma irradiation and Modified atmosphere packaging (MAP) on shelf life and quality of bitter gourd at ambient condition. The experiment comprised ten postharvest treatment viz., T0 =Control (untreated, unwrapped and non-irradiated); T1 =Gourds wrapped in Polypropylene (PP) bag; T2 =Gourds treated with 3% CaCl2; T3  = Irradiated at1000 Gy, T4= Irradiated at2000 Gy, T5 =3% CaCl2+  PP bag, T6 = 1000 Gy+ PP bag, T7  = 2000 Gy+ PP bag, T8 =3% CaCl2, + 1000 Gy+ PP bag and T9 = 3% CaCl2 + 2000 Gy+ PP bag. The single-factor experiment was carried out in a completely randomized design with three replications. Parameters investigated were fruit colour, shrinkage, moisture content, dry matter content, weight loss, disease incidence (DI), disease severity (DS) and shelf life. The minimum weight loss (3.49%), shrinkage (0.00%), DI (11.11%),DS (6.67%) and longest shelf life (10 days) were found in bitter gourds treated with T8 treatment, whereas the maximum weight loss (52.31%), shrinkage (3.89%), DI (77.78%), DS (76.67%) and shortest shelf life (4 days) were T0 treatment at 8 days after storage. The findings would have great impact in reducing enormous postharvest loss of bitter gourd and maintain their quality during postharvest handling and marketing under ambient condition.Bangladesh J. Nuclear Agric, 37(2): 57-68, 2023
2022 年 11 月至 12 月期间,孟加拉国核农业研究所园艺部收获后实验室进行了一项实验,研究不同剂量的伽马辐照和气调包装(MAP)对环境条件下苦瓜货架期和质量的影响。实验包括 10 个采后处理,即T0 = 对照组(未处理、未包装和未辐照);T1 = 用聚丙烯(PP)袋包装的苦瓜;T2 = 用 3% CaCl2 处理的苦瓜;T3 = 1000 Gy 辐照;T4 = 2000 Gy 辐照;T5 = 3% CaCl2+ PP 袋;T6 = 1000 Gy+ PP 袋;T7 = 2000 Gy+ PP 袋;T8 = 3% CaCl2 + 1000 Gy+ PP 袋;T9 = 3% CaCl2 + 2000 Gy+ PP 袋。单因素试验采用完全随机设计,三次重复。研究参数包括果实颜色、收缩率、水分含量、干物质含量、失重、病害发生率(DI)、病害严重程度(DS)和货架期。经 T8 处理的苦瓜重量损失最小(3.49%),收缩率最小(0.00%),病害发生率最小(11.11%),病害严重程度最小(6.67%),货架期最长(10 天);而经 T0 处理的苦瓜在贮藏 8 天后重量损失最大(52.31%),收缩率最大(3.89%),病害发生率最小(77.78%),病害严重程度最小(76.67%),货架期最短(4 天)。这些发现将对减少苦瓜收获后的巨大损失、保持其在收获后处理和常温条件下的销售质量产生重大影响:57-68, 2023
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引用次数: 0
Evaluation of cultivated gladiolus varieties of Bangladesh and radio sensitivity test for varietal improvement 孟加拉国剑兰栽培品种评估和改良品种的无线电敏感性测试
Pub Date : 2024-03-12 DOI: 10.3329/bjnag.v37i2.71779
N. Akhther, MR Islam, MR Hassan
The study was conducted at the research field of Nalitabari Sub-station, BINA, Sherpur during the period November 2019 to May 2020 to characterize, evaluate and select promising gladiolus varieties suitable for Bangladesh and to determine the optimum dose of radiation for LD50 for varietal improvement. The parameters studies were plant height, days to 1st flowering, number of leaves per plant, leaf length, leaf breadth, length of spike, length of rachis, number of flower per spike, flower diameter, number of corms per plant, weight of single corm, vase life, per cent germination, per cent survivability, shoot length and root length. The longest plant (154.2 cm) was observed in White Prosperity, while the shortest plant (101.7 cm) was in Regency. The longest leaf (70.3 cm) was found in Red Cascade and the shortest leaf (48.0 cm) was found in Her Majesty. The highest number of floret per spike was produced by Red Cascade (17.3) followed by White Prosperity (17.0). The Regency produced the lowest number (8.0) of floret per spike. The longest vase life (9.3 days) was observed in American Beauty followed by (8.7 days) Red Cascade, while the shortest vase life (5.7 days) was recorded in Wine and Roses. In radio sensitivity test, 30-40 Gy of gamma irradiation would be the optimal dose for inducing useful mutation in gladiolus.Bangladesh J. Nuclear Agric, 37(2): 43-56, 2023
该研究于2019年11月至2020年5月期间在谢尔布尔的孟加拉国农业研究所纳利塔巴里分站的研究田进行,旨在表征、评估和选择适合孟加拉国的有前途的剑兰品种,并确定用于品种改良的LD50最佳辐射剂量。研究参数包括株高、初花天数、每株叶片数、叶长、叶宽、穗长、轴长、每穗花朵数、花朵直径、每株球茎数、单个球茎重量、花瓶寿命、发芽率、存活率、芽长和根长。白色繁荣 "的植株最长(154.2 厘米),而 "瑞吉 "的植株最短(101.7 厘米)。叶片最长(70.3 厘米)的是 Red Cascade,叶片最短(48.0 厘米)的是 Her Majesty。每穗小花数最多的是 "红色瀑布"(17.3),其次是 "白色繁荣"(17.0)。摄政王的每穗小花数最少(8.0)。美国美人的花瓶寿命最长(9.3 天),其次是红瀑布(8.7 天),而葡萄酒和玫瑰的花瓶寿命最短(5.7 天)。在放射性敏感性测试中,30-40 Gy 伽马辐照是诱导剑兰发生有用突变的最佳剂量:43-56, 2023
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引用次数: 0
Yield performance of mutant blackgram variety Binamash-2 over locations in Bangladesh 孟加拉国黑鲩变异品种 Binamash-2 在不同地点的产量表现
Pub Date : 2024-03-12 DOI: 10.3329/bjnag.v37i2.71788
MM Islam, MM Hoque, ME Hossain, S. Begum, Mri Akondo, Sma Alim, MS Rahman, Maa Topu
Blackgram is one of the most important pulse crops extensively grown in Bangladesh with multiple uses. An experiment was conducted to examine the suitability and productivity of a gamma irradiated pulse variety Binamash-2 in Kharif-II season for two consecutive years 2021 and 2022 over four locations, Mymensingh, Chapainawabganj, Gopalganj and Magura districts. The experiment was consisted of two varieties viz. Binamash-2 and BARI Mash-3. Binamash-2 produced higher seed yield than BARI mash3 at all four locations. Binamash-2 produced bolder seeds with early maturity than BARI mash3. The seed coat color and size of Binamash-2 was more attractive than BARI mash3 and farmers of four studied areas are very much interested to cultivate Binamash-2 in the upcoming years.Bangladesh J. Nuclear Agric, 37(2): 153-159, 2023
黑粒豌豆是孟加拉国广泛种植的最重要的豌豆作物之一,具有多种用途。在 2021 年和 2022 年连续两年的 Kharif-II 季节,在 Mymensingh、Chapainawabganj、Gopalganj 和 Magura 四个地区进行了一项试验,以考察伽马射线辐照的豆类品种 Binamash-2 的适宜性和产量。试验由 Binamash-2 和 BARI Mash-3 两个品种组成。在所有四个地点,Binamash-2 的种子产量均高于 BARI Mash3。Binamash-2 比 BARI mash3 结出的种子更早熟。与 BARI mash3 相比,Binamash-2 的种皮颜色和大小更具吸引力,四个研究地区的农民都非常有兴趣在未来几年种植 Binamash-2:153-159, 2023
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引用次数: 0
Assessment of phenotypic and genotypic diversity in rice for salinity tolerance at reproductive stage 评估水稻生育期耐盐碱能力的表型和基因型多样性
Pub Date : 2024-03-12 DOI: 10.3329/bjnag.v37i2.71776
C. Saha, M. Khanom, S. Razia, AC Sharma, KK Saha, S. Yasmin, S. Begum
Soil salinity has turned out to be an important global concern, which affects tenable rice production in many agricultural countries like Bangladesh. A cross was made between Binadhan-7 with FL-478 for developing salt tolerant advance lines to assess phenotypic and genotypic diversity in rice for salinity tolerance. Twenty advance rice lines (Binadhan-7/FL-478) along with check varieties were screened for salinity tolerance at reproductive stage using sea site saline water having electrical conductivity (EC) 10 dS m-1. Among the twenty rice lines, seven lines were tolerant, three were moderately tolerant, six were susceptible, four were highly susceptible on the basis of phenotypic evaluation. Seven simple sequence repeat (SSR) markers linked with salt tolerance quantitative trait loci were used for investigation of salt tolerant rice lines. The result revealed that an average number of 6.286 alleles per locus were detected, with polymorphism information content (PIC) values ranging from 0.672 (RM490) to 0.838 (RM562). The highest gene diversity value (0.812) was found in RM562 and the lowest (0.684) was in RM490. A dendrogram constructed from the genetic distance of the genotypes produced four distinct clusters of twenty rice genotypes. Considering both phenotypic and genotypic observation, seven genotypes viz., Binadhan-10, FL-478, SL-51, SL-56, SL-77, EFSD-59 and IZSD-45 were identified as salt-tolerant; on the other hand, EFSD-21, SL-28, SL-32, SL-10, BRRI dhan28, and Binadhan-7 were identified as salt-susceptible. The identified salt-tolerant rice genotypes could be used in the improvement of rice breeding programs.Bangladesh J. Nuclear Agric, 37(2): 1-18, 2023
土壤盐碱化已成为全球关注的一个重要问题,影响着孟加拉国等许多农业国家的水稻生产。为了开发耐盐先进品系,我们用 Binadhan-7 与 FL-478 杂交,以评估水稻耐盐表型和基因型的多样性。利用电导率(EC)为 10 dS m-1 的海域盐水,对 20 个水稻先期品系(Binadhan-7/FL-478)和对照品种进行了生殖期耐盐性筛选。根据表型评估,在 20 个水稻品系中,7 个品系耐盐碱,3 个品系中度耐盐碱,6 个品系易感盐碱,4 个品系高度易感盐碱。利用与耐盐量性基因位点相连的 7 个简单序列重复(SSR)标记对耐盐性水稻品系进行了研究。结果表明,每个位点平均检测到 6.286 个等位基因,多态性信息含量(PIC)值从 0.672(RM490)到 0.838(RM562)不等。RM562的基因多样性值最高(0.812),RM490的基因多样性值最低(0.684)。根据基因型的遗传距离绘制的树枝图显示,20 个水稻基因型组成了 4 个不同的聚类。综合表型和基因型观察,7 个基因型(即 Binadhan-10、FL-478、SL-51、SL-56、SL-77、ESD-59 和 IZSD-45)被鉴定为耐盐基因型;另一方面,ESD-21、SL-28、SL-32、SL-10、BRRI dhan28 和 Binadhan-7 被鉴定为感盐基因型。所鉴定的耐盐水稻基因型可用于改进水稻育种计划:1-18, 2023
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引用次数: 0
Area coverage of BINA developed rice, pulse, oilseed and horticultural crop varieties in Bangladesh 孟加拉国国际水稻研究所开发的水稻、豆类、油籽和园艺作物品种的面积覆盖率
Pub Date : 2024-03-12 DOI: 10.3329/bjnag.v37i2.71784
MH Rahman, M. Sarkar, MO Haque, S. Islam
The study was conducted to assess the area coverage of BINA developed rice, pulse, oilseed and horticultural crop varieties during 2022-23. Field survey data were collected from 64 districts through concern DD, DAE office. Both tabular and descriptive statistical analysis was used. It was observed that the overall area coverage of BINA developed rice varieties were 8.91%. Among the three seasons; Aus, Aman and Boro the highest area coverage was found in Aman season that was 14.54% followed by Aus 5.95% and Boro 2.93%, respectively. Among the 14 agricultural regions the highest area coverage of rice was found 15.41% in Rajshahi region (Reg-7) and the lowest was found 1.01% in Dhaka region (Reg-11). The overall area coverage of BINA developed pulse varieties were 16.32% and among the 14 regions the highest area coverage for pulses was found in Barishal region 58.51% (Reg-6). The overall area coverage of BINA developed oilseed varieties were 23.46% and among the 14 regions the highest area coverage for oilseed was found in Jashore region 16.32% (Reg-13). Among the BINA developed horticultural varieties the highest area coverage was found 4.46% for Binalebu-1 followed by Binahalud-1 (0.93%) and Binatomato-10 (0.36%). It was also observed that, among the 14 regions the highest area coverage for Binalebu-1 and Binahalud-1 were found in Rangamati agricultural region (region-4) about 483 ha (87.26%) and 45 ha (18.19%), respectively. The study identified that the overall area coverage of BINA developed rice, pulse and oilseed crops for distributed seed were 0.93%, 1.41% and 3.45%, respectively. The study also observed some constraints such as-non availability of seed, lack of training, demonstrations, field day, collaboration etc. For continuation of variety expansion, the institute should ensure quality seed supply in proper time and training, demonstration as well as collaboration among other research institutes, DAE, BADC and NGOs should be emphasized.Bangladesh J. Nuclear Agric, 37(2): 89-107, 2023
该研究旨在评估 2022-23 年期间国际水稻研究所开发的水稻、豆类、油籽和园艺作物品种的覆盖面积。通过DD、DAE办公室从64个地区收集了实地调查数据。使用了表格和描述性统计分析。结果表明,国际水稻研究所开发的水稻品种的总面积覆盖率为 8.91%。在 Aus、Aman 和 Boro 三个季节中,Aman 季节的覆盖率最高,为 14.54%,其次分别是 Aus 5.95% 和 Boro 2.93%。在 14 个农业区中,水稻面积覆盖率最高的是拉杰沙希区(Reg-7),为 15.41%,最低的是达卡区(Reg-11),为 1.01%。BINA 开发的豆类品种的总面积覆盖率为 16.32%,在 14 个地区中,豆类面积覆盖率最高的是巴里沙勒地区(Reg-6),为 58.51%。国际油菜联盟开发的油菜籽品种的总面积覆盖率为 23.46%,在 14 个地区中,油菜籽面积覆盖率最高的是 Jashore 地区,为 16.32%(Reg-13)。在 BINA 培育的园艺品种中,Binalebu-1 的覆盖率最高,为 4.46%,其次是 Binahalud-1(0.93%)和 Binatomato-10(0.36%)。研究还发现,在 14 个地区中,Binalebu-1 和 Binahalud-1 在兰加马蒂农业区(第 4 区)的覆盖面积最大,分别为 483 公顷(87.26%)和 45 公顷(18.19%)。研究发现,BINA 开发的水稻、豆类和油料作物的总面积覆盖率分别为 0.93%、1.41% 和 3.45%。研究还发现了一些制约因素,如种子供应不足、缺乏培训、示范、田间日、合作等。为继续扩大品种,研究所应确保适时提供优质种子,并应重视培训、示范以及其他研究机构、农业部、农业发展与合作局和非政府组织之间的合作:89-107, 2023
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引用次数: 0
Profitability and marketing system of Binachinabadam-8 in some selected northern char areas of Bangladesh 孟加拉国北部一些选定 char 地区的 Binachinabadam-8 的盈利能力和营销系统
Pub Date : 2024-03-12 DOI: 10.3329/bjnag.v37i2.71785
M. Sarkar, MH Rahman, S. Islam
The present study was undertaken to assess the profitability, marketing system, production and marketing problems of a groundnut variety, Binachinabadam-8 in the river bed areas of Rangpur, Gaibandha and Kurigram districts during 2022–23. The study analyzed the efficiency of different marketing chains by ranking performance indicators using a composite index formula. The average per hectare production cost of Binachinabadam-8 was Tk. 90,470 and the net return was Tk. 68,064. The benefit-cost ratio was estimated at 1.75 and 2.89 on a full cost and variable cost basis. The average estimated marketing cost was highest (Tk. 925/quintal) for Stockist and lowest (Tk. 87/quintal) for Arathdar. Net marketing margin was also highest (Tk. 1787/quintal) for Stockist and lowest (Tk. 115/quintal) for Arathdar. Farmer’s share in consumer prices of Binachinabadam-8 in different marketing chains was the highest in Chain-IV (65.46%) and the lowest was in Chain-I (63.98%). The performance indicators revealed that the Chain-IV was the most efficient of the chains. Farmers reported major problems including lack of irrigation facilities, high seed value, flood incidence, high fertilizer prices, lack of capital, lack of training and insect and pest. The farmers faced significant marketing challenges, including unstable prices, high transportation charges, lack of storage facilities and lack of cash capital. Therefore, the study will help to over undertake appropriate measures to overcome the production and marketing problems and thereby will increase the profitability and production of Binachinabadam-8 in the river bed areas of Bangladesh.Bangladesh J. Nuclear Agric, 37(2): 109-120, 2023
本研究旨在评估 2022-23 年期间兰布尔、盖班达和库里格拉姆地区河床地区花生品种 Binachinabadam-8 的盈利能力、营销体系、生产和营销问题。研究通过使用综合指数公式对绩效指标进行排序,分析了不同营销链的效率。Binachinabadam-8 的平均每公顷生产成本为 90,470 塔卡,净收益为 68,064 塔卡。按全部成本和可变成本计算,效益成本比估计分别为 1.75 和 2.89。Stockist 的平均估计营销成本最高(925 塔卡/公担),而 Arathdar 的最低(87 塔卡/公担)。净销售利润率也是 Stockist 最高(1787 塔卡/公担),Arathdar 最低(115 塔卡/公担)。在不同销售链中,农民在 Binachinabadam-8 消费价格中所占的份额在销售链-IV 中最高(65.46%),在销售链-I 中最低(63.98%)。绩效指标显示,销售链-IV 的效率最高。农民反映的主要问题包括缺乏灌溉设施、种子价值高、洪水灾害、化肥价格高、缺乏资金、缺乏培训以及虫害。农民在销售方面面临重大挑战,包括价格不稳定、运输费用高、缺乏仓储设施和缺乏现金资本。因此,这项研究将有助于采取适当措施克服生产和销售问题,从而提高孟加拉国河床地区 Binachinabadam-8 的收益和产量:109-120, 2023
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引用次数: 0
A review of naturally occurring radioactive elements in coastal regions of Bangladesh 孟加拉国沿海地区天然放射性元素综述
Pub Date : 2024-03-12 DOI: 10.3329/bjnag.v37i2.71787
KS Arefin, Msh Suny, M. Hassan, Mmh Sohag
Extensive and systematic study has been carried out globally to get a thorough understanding of the underlying dynamics of radionuclides in the environment. This study was aimed to examine the natural radioactivity level in coastal areas of Bangladesh by combining the main research carried out on environmental radioactivity, predominantly employing established nuclear methods and methodologies during the past. The concentrations of important radionuclides, including 226Ra, 232Th, 40K, 238U, and 235U, were measured in those investigations. Soil samples showed the highest concentration of 226Ra at Inani Beach, Cox's Bazar (21°8ʹ N latitude, 92°4ʹ E longitude), with a value of 61.66 Bqkg-1. On the other hand, Cox's Bazar Sea Beach has the lowest 226Ra concentration at 10.8 Bqkg-1. In contrast, Cox's Bazar had the highest 226Ra activity in the sand and silt samples (147.93 Bqkg-1), whereas Kuakata Sea Beach (21° 48ʹ N latitude and 90° 10ʹ E longitude) had the lowest (2.82 Bqkg-1). The research found that 226Th activity varied from 1085.99 Bqkg-1 to 27.4 Bqkg-1 in soil samples from Cox's Bazar Sea Beach. In Cox's Bazar, the sand and silt samples showed the highest 226Th activity at 1085.9 Bqkg-1. In contrast, Kuakata Sea Beach has the lowest radioactivity at 9.22 Bqkg-1. Soil samples showed that 40K content was highest at Inani Beach (21°13ʹ N latitude and 92°3ʹ E longitude), Cox's Bazar (1304.11 Bqkg-1) and lowest at Cox's Bazar Sea Beach (25.16 Bqkg-1). The sand and silt sample from Kuakata Sea Beach had the greatest 40K activity, measuring 852 Bqkg-1. However, the sample from Cox's Bazar Sea Beach had the lowest amount (21.9 Bqkg-1). Soil samples from Cox's Bazar Sea Beach showed 238U activity of 455.99 Bqkg-1 and 110.84 Bqkg-1, respectively. The highest 238U activity sand sample was found in Cox's Bazar, measuring 460.5 Bqkg-1. The Patenga region (22°14ʹ N  latitude and 91°47ʹ E longitude) in Chattogram has the lowest radioactive level, 45.2 Bqkg-1. The study's findings have been meticulously recorded as crucial foundational knowledge for forthcoming investigations on radionuclides in this coastal area. A comprehensive evaluation of prior published analyses of naturally occurring radioactive elements in the coastal regions of Bangladesh has shown that the level of activity is completely non-hazardous. The experimental areas' soils are ideal for a variety of agricultural and other purposes.Bangladesh J. Nuclear Agric, 37(2): 135-152, 2023
为了彻底了解环境中放射性核素的基本动态,全球范围内开展了广泛而系统的研究。这项研究的目的是结合过去主要采用成熟的核方法和方法对环境放射性进行的主要研究,对孟加拉国沿海地区的天然放射性水平进行检测。这些研究测量了重要放射性核素的浓度,包括 226Ra、232Th、40K、238U 和 235U。土壤样本显示,226Ra 的最高浓度出现在考克斯巴扎尔的伊纳尼海滩(北纬 21°8ʹ,东经 92°4ʹ),数值为 61.66 Bqkg-1。另一方面,科克斯巴扎尔海海滩的 226Ra 浓度最低,为 10.8 Bqkg-1。相比之下,考克斯巴扎尔的沙子和淤泥样本中 226Ra 活性最高(147.93 Bqkg-1),而 Kuakata 海滩(北纬 21° 48ʹ,东经 90° 10ʹ)的 226Ra 活性最低(2.82 Bqkg-1)。研究发现,在科克斯巴扎尔海海滩的土壤样本中,226Th 的放射性活度从 1085.99 Bqkg-1 到 27.4 Bqkg-1 不等。在考克斯巴扎尔,沙子和淤泥样本中的 226Th 活性最高,为 1085.9 Bqkg-1。相比之下,Kuakata 海滩的放射性最低,为 9.22 Bqkg-1。土壤样本显示,40K 含量在 Inani 海滩(北纬 21°13ʹ ,东经 92°3ʹ)、Cox's Bazar(1304.11 Bqkg-1)最高,在 Cox's Bazar 海滩(25.16 Bqkg-1)最低。Kuakata 海滩的沙子和淤泥样本的 40K 放射性活度最高,为 852 Bqkg-1。然而,来自考克斯巴扎尔海海滩的样本的 40K 活性最低(21.9 Bqkg-1)。考克斯巴扎尔海水浴场的土壤样本的 238U 放射性活度分别为 455.99 Bqkg-1 和 110.84 Bqkg-1。238U 放射性活度最高的沙子样本出现在考克斯巴扎尔,为 460.5 Bqkg-1。恰特格勒的 Patenga 地区(北纬 22°14ʹ,东经 91°47ʹ)放射性水平最低,为 45.2 Bqkg-1。这项研究的结果已被详细记录下来,作为今后对该沿海地区放射性核素进行调查的重要基础知识。对之前公布的孟加拉国沿海地区天然放射性元素分析结果进行的综合评估表明,放射性活度完全不具危险性。实验区的土壤非常适合各种农业和其他用途:135-152, 2023
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引用次数: 0
Effect of Gamma Irradiation on Embryogenic Calli of Rice and Subsequent Shoot and Regeneration 伽马辐照对水稻胚胎萌发胼胝体及其后的抽芽和再生的影响
Pub Date : 2024-03-12 DOI: 10.3329/bjnag.v37i2.71778
MM Islam, M. Akter, Mka Nadim, M. Reza, MI Uddin, F. Khatun
This study was carried out during May 2021 to January 2022 at the Tissue Culture Laboratory of Biotechnology Division, Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, Bangladesh for callus induction and regeneration ability of plantlet from low doses irradiated embryogenic calli of Binadhan-13 and BR5 (Dulabhog). The effect of low gamma rays such as 4, 6 and 8 Gy were observed in vitro shoot, root and plantlet formation. Two different incubation conditions such as light and dark incubation were maintained. Between two varieties, Binadhan-13 showed the highest ability of callus induction in both conditions. Callus induction was significantly higher under dark condition (77.14%) than light condition (67.14%) ‍at 21 days. Data revealed that gamma rays affect both shoot and root regeneration ability of embryogenic callus. Shoot regeneration ability was the highest at 4 Gy in Binadhan-13 (60%) and gradually decreased with the increased doses of gamma rays. Among the treatments, shoot regeneration ability (60% in Binadhan-13 and 50% in BR5) was higher at 4 Gy dose of gamma ray followed by 6 Gy where shoot regeneration ability was 55% and 45% in Binadhan-13 and BR5 respectively. In root induction, the highest root induction ability (80%) was observed in the cultivar Binadhan-13 at control condition. Like shoot regeneration, 4 Gy gamma ray showed better root induction in both the varieties (70% in Binadhan-13, 60% in BR5). The in vitro regenerated plantlets from irradiated embryogenic calli were successfully transferred to soil in pots. The regeneration protocol could be further used for varietal improvement of rice varieties using nuclear technique (60Co gamma ray).Bangladesh J. Nuclear Agric, 37(2): 29-42, 2023
本研究于 2021 年 5 月至 2022 年 1 月在孟加拉国迈门辛孟加拉国核农业研究所(BINA)生物技术部组织培养实验室进行,目的是利用低剂量辐照的 Binadhan-13 和 BR5(Dulabhog)胚茧进行胼胝体诱导和小植株再生能力研究。观察了低伽马射线(如 4、6 和 8 Gy)对离体芽、根和小植株形成的影响。实验采用了两种不同的培养条件,如光照和黑暗培养。在两个品种中,Binadhan-13 在两种条件下的胼胝体诱导能力最强。21 天时,黑暗条件下的胼胝体诱导率(77.14%)明显高于光照条件下的(67.14%)‍。数据显示,伽马射线对胚性胼胝体的芽和根的再生能力都有影响。Binadhan-13 的芽再生能力在 4 Gy 时最高(60%),随着伽马射线剂量的增加,芽再生能力逐渐下降。在各处理中,4 Gy 剂量的伽马射线对芽再生能力的影响最大(Binadhan-13 为 60%,BR5 为 50%),其次是 6 Gy,Binadhan-13 和 BR5 的芽再生能力分别为 55% 和 45%。在根诱导方面,对照条件下,Binadhan-13 的根诱导能力最高(80%)。与嫩枝再生一样,4 Gy 伽马射线对两个品种的根诱导能力都较好(Binadhan-13 为 70%,BR5 为 60%)。从辐照胚化胼胝体中提取的离体再生小植株成功地转移到了盆栽土壤中。该再生方案可进一步用于利用核技术(60Co 伽马射线)进行水稻品种改良:29-42, 2023
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引用次数: 0
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Bangladesh Journal of Nuclear Agriculture
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