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Mehta A.,Central Potato Research Station | Singh B.,Central Potato Research Institute | Ezekiel R.,Central Potato Research Institute | Kumar D.,Central Potato Research Institute Campus
Potato Research | Year: 2010

Indigenous non-refrigerated methods like heaps and pits are used in India for short-term storage of potatoes (Solanum tuberosum L.) to avoid distress sale. Storing untreated potatoes generally results in high losses from sprouting, moisture loss and rotting. To reduce storage losses by inhibition of sprouting and to determine the suitability of stored potatoes for processing into crisps, a single spray application of a commercial formulation of 3-chlorophenyl carbamate (CIPC or chlorpropham) 50% a.i., (Oorja, United Phosphorus Limited, Mumbai, India) of CIPC (or chlorpropham) was tested on potatoes during storage from March to June under two traditional storage methods [heap (17-33 °C, 58-92% relative humidity (RH)) and pit (17-27 °C, 72-95% RH)] in 2 years [2005 up to 90 days of storage (DOS) and 2006 up to 105 DOS], using four cultivars and two rates of CIPC application (20 and 30 mg a.i. kg -1 tubers). The two rates of application were comparably effective in reducing weight losses, sprouting and sprout growth in stored tubers, and the effect was more pronounced in pit storage than in heap storage. By contrast to untreated tubers, CIPC-treated potatoes remained turgid under the two storage methods and fetched market prices comparable to those for cold-stored (2-4 °C) potatoes after 105 days of storage. Reducing sugar concentrations in treated potatoes decreased during storage especially in 2006 when the initial reducing sugar concentration was higher than in 2005. Crisp colour improved only in 2005 after 90 DOS, but it deteriorated in 2006 during storage up to 105 DOS. Sucrose concentration increased tremendously during storage in 2 years. Only one cultivar (Kufri Chipsona-1) with low initial reducing sugar concentration and less sucrose accumulation during storage could produce acceptable colour crisps after storage in both years. The remaining three cultivars-with high initial reducing sugar concentration-were suitable for processing after storage in heap and pit in 2005, but not in 2006. Stored potatoes were safe for human consumption as the CIPC residue concentrations were far below the permissible level of 10 mg kg -1 as prescribed by the European Union. Single spray application of CIPC (20 mg kg -1 treatment) can effectively reduce storage losses in potatoes stored in traditional non-refrigerated methods of heap and pit and extend the storage life by 90 to 105 days. © 2010 EAPR. Source


Chakraborty S.,National Institute of Plant Genome Research | Chakraborty N.,National Institute of Plant Genome Research | Agrawal L.,National Institute of Plant Genome Research | Ghosh S.,National Institute of Plant Genome Research | And 6 more authors.
Proceedings of the National Academy of Sciences of the United States of America | Year: 2010

Protein deficiency is the most crucial factor that affects physical growth and development and that increases morbidity and mortality especially in developing countries. Efforts have been made to improve protein quality and quantity in crop plants but with limited success. Here, we report the development of transgenic potatoes with enhanced nutritive value by tuber-specific expression of a seed protein, AmA1 (Amaranth Albumin 1), in seven genotypic backgrounds suitable for cultivation in different agro-climatic regions. Analyses of the transgenic tubers revealed up to 60% increase in total protein content. In addition, the concentrations of several essential amino acids were increased significantly intransgenic tubers, which are otherwise limited in potato. Moreover, the transgenics also exhibited enhanced photosynthetic activity with a concomitant increase in total biomass. These results are striking because this genetic manipulation also resulted in a moderate increase in tuber yield. The comparative protein profiling suggests that the proteome rebalancing might cause increased protein content in transgenic tubers. Furthermore, the data on field performance and safety evaluation indicate that the transgenic potatoes are suitable for commercial cultivation. In vitro and in vivo studies on experimental animals demonstrate that the transgenic tubers are also safe for human consumption. Altogether, these results emphasize that the expression of AmA1 is a potential strategy for the nutritional improvement of food crops. Source


Chaudhary B.,Central Potato Research Institute Campus
Indian Journal of Agricultural Sciences | Year: 2016

Traditional farming method plays an important role in human civilization. Indigenous knowledge is declining because of new agricultural technology has replaced traditional cultivation. But in the some part of country like Eastern Uttar Pradesh and Northern Madhya Pradesh (Bundelkhand Region), social/tribal communities are keeping preserve the traditional knowledge. A survey was made in the villages of five districts of Eastern Uttar Pradesh (Mahoba, Banda, Rath, Chitrkoot and Hamirpur) and one district of Northern part of Madhya Pradesh (Chhattarpur). The study was conducted on indigenous knowledge of sunnhemp (Crotalaria juncea L.) fibre cultivation in Bundelkhand region in India where the social/tribal communities are still preserving the traditional cultivation of sunnhemp as fiber crop. Source


Sharma V.,Central Potato Research Institute Campus | Singh B.P.,Central Potato Research Institute
Potato Journal | Year: 2011

To study the effect of pest infestation on processing attributes of processing varieties in early crop season, studies were carried out at Modipuram, Uttar Pradesh, India during 2003-04 and 2004-05. Studies revealed that the pest infestation significantly lowered the level of both reducing sugar and sucrose content in early crop season. Since leaf hopper (Amrasca devastans Distant), mite (Polyphagotarsonemus latus Banks.) and whitefly (Bemisia tabaci Gennadius) were found associated with early crop season, it is concluded that if these pests are allowed to infest the crop would lead to decrease in the sugar content which could result in better quality of chips. Similarly free amino acid content was also reduced by pest infestation. However, due to increased phenol content in pest infested crop this advantage could not be realized and consequently the quality of the chip made from pest infested crop was of inferior quality. Dry matter content on the other hand decreased substantially (4.9-15.8%) during early crop season as a result of pest infestation. Source


Minhas J.S.,Central Potato Research Institute | Rawat S.,Central Potato Research Institute | Govindakrishnan P.M.,Central Potato Research Institute | Kumar D.,Central Potato Research Institute Campus
Potato Journal | Year: 2011

Potato cultivation is limited to relatively cooler areas and seasons throughout the world due to photo and thermosensitivity of the crop. Attempts to take potato to warmer areas have resulted in drastic reduction in tuber yield or even failure of tuberization. The mean night temperature in large parts of peninsular India are between 18 - 20° C and climate change is likely to lead to an overall temperature increase of 1-1.5° C, therefore, heat tolerant varieties which can tuberize and bulk well up to 20° C night temperature are needed for these areas. CPRI has developed a heat tolerant variety Kufri Surya. In the present study, potential areas for the deployment of this variety were identified by weather simulation studies. Sixteen locations in non-traditional potato growing areas of peninsular India were selected and an estimate of the available number of days in a year suitable for potato crop at different night temperature scenarios, viz. 18, 20 and 22° C were simulated. The results showed that heat tolerant varieties having 2-4° C advantage for tuberization were suitable for more number of locations and could grow for a longer duration as compared to existing high yielding varieties. Source

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