ABSTRACT
Antifreeze proteins (AFPs) protect organisms from freezing and shows great diversity in structure and they have been found in a variety of organisms including vertebrates, invertebrates, plants, bacteria, and fungi. Study of AFPs is a promising issue due to diverse applications in the fields of industry, medical and agriculture such as food technology, cell lines and organ preservation, transplantation and transfusion. In this review, physicochemical, functional and structural features of some antifreeze proteins of each organism like insects, fish, plant, bacteria and fungi have been described. This review also focused on the structure-function relationship of antifreeze proteins. The result of structure analysis infers that AFPs are mostly hydrophobic and plays the important role in ice binding. In this study, recent new insights into the mechanism of action of four types of AFPs have also been discussed.
Key words: Antifreeze proteins, crystallization, mechanism, structure analysis.
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ABSTRACT
An experiment was conducted at Jute Agriculture Experimental Station, Manikganj to find out the leaf yield of different jute vegetable varieties at different sowing times. BJRI released three jute vegetable varieties such as BJRI deshi pat shak-1 (V1); BJRI deshi pat shak-2 (V2); BJRI deshi pat shak-3 (V3) and three sowing time i.e. 1st week of March (S1); 1st week of May (S2); 1st week of July (V3) were used as experimental treatments. The experiment was designed RCBD with three replicates. Results revealed that, the highest plant population, plant height, leaf number were found better in BJRI deshi pat shak-3 (Merha green), whereas leaf area, leaf fresh weight per plant and leaf yield were found maximum from BJRI deshi pat shak-1. On the other hand, out of three seasons March is more suitable for leaf yield.
Key words: Jute, leafy vegetable, leaf area, yield
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ABSTRACT
Kenaf seeds lose their ability to germinate during storage, leading to a lack of quality seeds compared to planting requirements, hindering the expansion of kenaf cultivation in Bangladesh. The effects of different storage containers on the germination, electrical conductivity, vigor index and accelerated aging of kenaf seeds of three varieties were studied during a 6-month storage period from 20th February 2020 to 20th August 2020 in a room. Four different containers viz. C1= aluminum foil, C2= plastic pot, C3= earthen pot and C4= gunny bag was used to store kenaf seeds. Three varieties, V1=HC-95, V2=HC-2 and V3=BJRI Kenaf-3 were used in this experiment. This experiment revealed that the percentage of germination, vigor index and accelerated aging of all three varieties were reduced with increasing the storage time. On the other hand, electrical conductivity percent of all varieties were increased with increasing the storage period. Among the four containers it was observed that after 180 days of storage germination percentage, vigor index percent and accelerated aging percent were maximum for aluminum foil and the lowest were found in gunny bag whereas plastic pot and earthen pot remained in the middle position. On the other hand, at 180 days after storage the highest electrical conductivity was found in gunny bag (65.22%) and the lowest was found (39.89%) in aluminum foil. Germination rate at 180 DAS was recorded maximum in HC-95 (65.2%) and minimum in BJRI Kenaf-3 (57.3%). The highest electrical conductivity at 180 DAS was found in BJRI Kenaf-3 (42.78%) and the lowest was found in HC-2 (36.46%). The highest vigor index and accelerated aging was found (39.55% and 59.89%), respectively at 180 DAS were obtained in HC-95 (15.8%) and the lowest was found (34.24% and 56.88%, respectively) in BJRI Kenaf-3 at 180 DAS. The results reveal that the quality of kenaf seeds decrease with increase the storage time.
Key words: Kenaf, seed quality, vigor, germination
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ABSTRACT
Mesta seed viability declines during storage, leading to a shortage of high-quality seeds for planting. This shortage acts as a barrier to expanding mesta cultivation in Bangladesh. The effect of different storage containers on germination, field emergence, vigor index and 100-seed weight of mesta seeds of three varieties were studied during the six months storage period beginning from mid-February 2022 to mid-August in 2022 at seed laboratory, Jute Agriculture Experimental Station, Jagir, Manikganj. Four different seed storage containers viz. aluminum foil, plastic pot, earthen pot and gunny bag were used to store mesta seeds. Three varieties viz., SAMU-93, VM-1 and HS-24 were used as experimental materials. Highest seed germination, field emergence, vigor index was recorded in aluminum foil container (72.25%, 65.12% and 35.57%) at 180 days after storage (DAS) and lowest were (38.46%, 32.94% and 25.87%) in gunny bag at the same storage period. Highest 100-seed weight was recorded (3.86g) in gunny bag and lowest was (3.06g) in aluminum foil followed by (3.10g) in plastic pot at 180 DAS. Highest seed germination (71.12%), field emergence (62.58%) and vigor index (35.57%) were recorded in the variety SAMU-93 and lowest (68.08%, 59.12% and 31.12%, respectively) were recorded in HS-24 variety at 180 DAS. On the other hand, the highest and the lowest 100-seed weight was recorded (4.02g and 3.65g, respectively) in HS-24 and SAMU-93 varieties respectively at 180 days storage period. Results revealed that increasing storage period is the cause of decreasing seed quality.
Key words: Mesta, seed quality, vigor, storage containers.
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ABSTRACT
The experiment was conducted at Jute Agriculture Experimental Station, Jagir, Manikganj to study the diseases severity (die back, seedling blight) of tossa jute. Four tossa jute varieties (O-9897, O-72, O-795 and OM-1) and three harvesting time (15, 45, 75 days after sowing (DAS)) were considered as experimental treatments. The experiment was designed RCBD with three replications. Diseases severity was calculated by manually counting of seedling blight and die back diseases infected plants per unit area. Diseases severity found maximum in O-9897 and O-795 varieties and seedling blight found maximum at 15 days aged plant whereas die back found maximum at 45-75 days old tossa jute plants.
Key words: Jute, Corchorus olitorius, diseases severity, die back.
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ABSTRACT
An experiment was conducted at BJRI, Dhaka during the year 2023 with two previously screened jute genotype Acc. 4592 and C. incisifolias and three control; BJRI Deshi pat shak 1, BJRI Deshi pat shak 2 and BJRI Deshi pat shak 3. The plants were harvested after 25 days. The highest leaf yield was found in BJRI Deshi pat shak 1 followed by C. incisifolias and there was no significant difference, respectively. Acc. 4592 is notable for its greater height and flowering habit, although it has somewhat lower green and dry twig weights compared to C. incisifolias and BJRI Deshi pat shak 1. BJRI Deshi pat shak 2 and BJRI Deshi pat shak 3 consistently exhibit lower green weight, green twig weight, and dry twig weight, suggesting they may be less vigorous in terms of biomass production. C. incisifolias and BJRI Deshi pat shak 1 share many similar traits, with strong green and dry weights, and neither of them flowered.
Key words: Vegetable type jute, jute leaf, C. incisifolias and twig weight.
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