Comparative Study of Conventional and Improved Retting of Jute with Microbial Formulation

Das, Suparna; Majumdar, B.; Saha, A. R.; Sarkar, S.; Jha, S. K.; Saha, R.

doi:10.1007/s40011-017-0872-x

Cited by 19 publications

(31 citation statements)

References 8 publications

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“…The microbial formulation (CRIJAF Sona) used for jute retting required less water (1:5) compared to the conventional method (1:20) and repeated retting can also done in the same water without compromising the fibre quality (Das et al, 2015). Higher fibre recovery and increase in income was mainly because of better quality fibre resulting from improved retting of jute plants with 'CRIJAF Sona' (Das et al, 2018). The sustainability index (SYI) of the study revealed that ICM practices can provide minimum guaranteed yield that was obtained in terms of maximum observed yield of the area.…”

Section: Discussionmentioning

confidence: 99%

Impacts of climate smart jute farming on resource use efficiency, productivity and economic benefits in rural Eastern India

et al. 2019

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The study was conducted in jute-growing areas of West Bengal (India) to explore the potential resource use efficiency for economic benefits of selected climate smart practices to marginal landholder farmers. Integrated crop management (ICM) practices as part of climate smart jute farming (CSJF) was practised by 170 randomly selected farmers in six villages. An estimation of cost of adoption, change in fibre yields, net returns and human development index (HDI) before and after ICM interventions was done. The mean HDI value increased by 38.85% and farm income by 31.5%. The net benefits of adaptation to climate smart jute technologies were estimated based on specific adaptation actions. Empirical scientific evidence of the study indicates that the livelihoods of marginal landholders can be improved using new crop varieties, changing planting dates and bringing necessary changes in other variable inputs for line sowing, intercropping, weeding, nutrients, water and retting.

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Section: Discussionmentioning

confidence: 99%

Impacts of climate smart jute farming on resource use efficiency, productivity and economic benefits in rural Eastern India

et al. 2019

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“…The microbial retting consortium has been proved beneficial for faster retting of jute with fibre quality improvement in terms of colour, lustre, fibre strength and fibre fineness etc. (Das et al, 2015;Das et al, 2018). The partial sequences of 16S rRNA gene and genome sequences of PJRB1, PJRB2 and PJRB3 have been submitted to National Centre for Biotechnology Information (NCBI) with accession number KM091823, KM091824 and KM091825, and VFLO0000000, VFLN00000000 and VFLM00000000 respectively (Das et al, 2015;Datta et al, 2020).…”

Section: O N L I N E C O P ÿmentioning

confidence: 99%

An insight into the sequential changes in enzymatic activities during retting of jute (Corchorus spp. L.).

Majumdar¹,

Saha²,

Sarkar³

et al. 2021

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Aim: To study the dynamics of enzymes involved in biochemical process of jute (Corchorus spp.) retting with and without microbial retting consortium. Methodology: Two large scale retting trials were conducted with and without microbial retting consortium in triplicate. The retting water samples were collected every day at 24 hrs interval from both the trials. Polygalcturonase (PG), pectin lyase (PNL) and xylanase activities along with the pH were measured from the collected retting water samples following standard procedure. Fibre quality parameters were also studied from the resultant fibre obtained from both the retting trials. Results: There was a sharp decrease in pH of retting liquor by 1.35 units and that of pectin lyase activity by 97.9 Uml-1 within 24 hrs of inoculation of microbial retting consortium. Thereafter, higher pectin lyase (123.1 Uml-1), polygalacturonase (3.56 Iuml-1) and xylanase (0.818 IUml-1) activities were recorded during middle stage of retting. The enzyme activities were lower and non-significant at last stage of retting (11-14 days). The completion of retting without microbial consortium took longer time due to lower enzymatic activities as compared to microbial consortium mediated retting. Interpretation: The PG, PNL and xylanase enzymes released by the microbial consortium during retting of jute helped in faster biodegradation of pectin and xylan compared to control retting. Hence, the pre retting treatment of jute with microbial consortium is suggested for quick retting.

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“…Many Bacillus sp. are also widely reported to produce enzymes of industrial application in paper industry [28][29][30][31][32][33] and bast fibre degumming 34,35 . The abundance of these species in our study is in accordance with the earlier culture-based studies, which implicate their role in the retting of jute 3,13 .…”

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Pectinolytic Bacterial Consortia Reduce Jute Retting Period and Improve Fibre Quality

Hasan

Aktar

Kabir

et al. 2020

Sci Rep

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Jute fibre is the second most important fibre next to cotton. It is obtained from the bark of plant through microbial retting process. Here we report optimized microbial retting protocol that can lower retting period and produce high fibre quality. A total of 451 bacterial colonies have been isolated from five jute retting water samples in Bangladesh. Higher pectinolytic bacterial isolates were predominant in the later stage of jute retting. Out of these, 168 isolates have been screened by both semi-quantitative and quantitative pectinase, xylanase and cellulase enzyme assay. Among them, 144 isolates have been selected on the basis of extra cellular enzyme activity of these three enzymes. 16 s ribosomal gene sequencing analysis identified 2 phyla-Firmicutis (80.55%) and Proteobacteria (19.45%). To check the synergistic and antagonistic effect 10 selected isolates were tested in 167 different combinations. Three best combinations were identified that lowered retting period from 18-21 days to 10 days producing high quality fibre in both laboratory and field trial. This improved retting technology can be adopted in industrial scale for the production of quality jute fibre in a controlled condition in reduced water quantity without polluting the environment.Jute, second most important natural fibre after cotton, is cultivated in East Asia and some parts of Latin America 1-3 . Jute is a bast or phloem fibre in the bark of stems, cemented together by pectin and gummy substances 4 . Commercial extraction of jute fibre is water based microbiological retting where jute bundles are submerged into slow running river water and subjected to decomposition of pectin, hemicelluloses, and other mucilaginous substances 2,5 . In this process, pectin is depolymerized by pectinases, primarily comprising four enzymes: Polygalacturonase (PG), Pectin Lyase (PNL), Pectate lyase and Pectin esterase. However, PG 6 , and PNL 7 are primary retting enzymes. In addition, xylanase makes jute fibre softer by selective removal of non-fibrous hemicelluloses without affecting strength of cellulosic fibre. Pectinolytic microorganisms having xylanase activity devoid of cellulase activity is an additional beneficial aspect to improve fibre quality 8 . The quality of fibre is largely determined by the efficiency of retting process 1,2,9,10 and various factors are responsible for proper retting as well as improved fibre quality. Most promising water based microbiological retting process mostly involves bacteria along with various fungi, protozoa, algae and diatoms 10-13 . Main aerobic retting bacteria belong to genus Bacillus viz., B. subtilis, B. polymyxa, B. mesentericus, B.pumilus, B. cereus, B. megaterium and B. macerans, initiate retting 14-18 along with large numbers of gram-negative genera such as Erwinia and Pseudomonas 9,19 . At the later stage of retting some anaerobic bacteria from genus Clostridium -Clostridium acetobutylicum, Clostridium stercorarium, Clostridium tertium come to carry on the retting process 20 . As microorganisms are the ma...

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Comparative Study of Conventional and Improved Retting of Jute with Microbial Formulation

Cited by 19 publications

References 8 publications

Impacts of climate smart jute farming on resource use efficiency, productivity and economic benefits in rural Eastern India

Impacts of climate smart jute farming on resource use efficiency, productivity and economic benefits in rural Eastern India

An insight into the sequential changes in enzymatic activities during retting of jute (Corchorus spp. L.).

Pectinolytic Bacterial Consortia Reduce Jute Retting Period and Improve Fibre Quality

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