Characteristics of the proteins of the tubers of winged bean (<i>Psophocarpus tetragonolobus</i> (L.) DC)

Aa, Kortt; Jb, Caldwell

doi:10.1002/jsfa.2740350310

Cited by 12 publications

(9 citation statements)

References 20 publications

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“…On the other hand, WBT-TI-I1 from tubers is a single polypeptide protein of M, 24,000. These data are in agreement with observations made for winged bean tuber proteinase inhibitors earlier (Kortt and Caldwell 1984).…”

Section: Discussionsupporting

confidence: 93%

Trypsin Inhibitors of Winged Bean Tubers (Psophocarpus Tetragonolobus): Purification and Properties

Murugiswamy¹,

Madaiah²

1989

J Food Biochemistry

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Two trypsin inhibitors (WBT‐TI‐I and WBT‐TI‐II) which differ in their physicochemical properties have been isolated from winged bean tubers, using affinity chromatography and ion‐exchange chromatography. WBT‐TI‐I inhibits trypsin, has a molecular weight of 45,000 (± 1000) and has two subunits of Mr 22,000 as determined by gel filtration, ultracentrifugation and SDS‐PAGE studies. WBT‐TI‐II inhibits trypsin in addition to chymotrypsin and pepsin, and has a molecular weight of 24,000 (± 1000) as estimated by gel‐filtration, ultracentrifugation and SDS‐PAGE. Although WBT‐TI‐I and WBT‐TI‐II were homogeneous by gel filtration, ultracentrifugation and SDS‐PAGE, they were electrophoretically heterogeneous on PAGE at pH 8.3. Since WBT‐TI‐II, when purified by immunoaffinity chromatography, did not show heterogeneity by PAGE at pH 8.3, it was concluded that heterogeneity arose from modification of the native inhibitor on trypsin affinity column. WBT‐TI‐I and WBT‐TI‐II are immunologically different. The antibodies of WBT‐TI‐II cross react with winged bean seed extract.

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Section: Discussionsupporting

confidence: 93%

Trypsin Inhibitors of Winged Bean Tubers (Psophocarpus Tetragonolobus): Purification and Properties

Murugiswamy¹,

Madaiah²

1989

J Food Biochemistry

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“…Evans et al (1977) estimated the non-amino-acid-N to be around 50% of the N measured in the whole tuber. On the other hand, Poulter (1982) determined non-protein N to be about 13%, and de Lumen and Reyes (1982) 16%; while Kortt and Caldwell (1984) found for six winged bean accessions (including one from Myanmar) that non-aminoacid-N accounted for between 7.7 and 16.9% (mean 12.6%) of the total tuber N. Although these laboratory reports differ somewhat in the methods they used, all authors would likely agree with the conclusion of Kortt and Caldwell (1984) that "the non-dialysable protein content of winged bean [tubers] is … less than previously assumed but is still relatively high for a tuber crop." Unfortunately, it would seem that with the exception of Kortt and Caldwell's study there have been no published analyses of tuber quality specifically on genotypes from Myanmar.…”

Section: Tuber Production Mandalay Region Myanmarmentioning

confidence: 96%

Review: Winged bean (Psophocarpus tetragonolobus) cropping systems

Eagleton¹

2020

Biodiversitas

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Abstract. Eagleton GE. 2020. Review: Winged bean (Psophocarpus tetragonolobus) cropping systems. Biodiversitas 21: 5927-5946. Winged bean (Psophocarpus tetragonolobus (L.) DC.) is a rambling, nitrogen-rich, leguminous crop of the Old-World tropics. This review of winged bean (WB) within cropping systems of Southeast Asia and Melanesia revisited four traditional roles that the crop has played: as a minor courtyard vegetable of villages and suburbs throughout the region; as a popular tuber crop in the irrigated plains of Tada-U township in Central Myanmar; as a companion crop in the mixed garden fields of Wamena in Indonesian New Guinea; and as a niche tuber crop in rotation with sweet potato near Goroka in Papua New Guinea (PNG). Drawing upon such traditions, researchers since the 1970s have identified potential new roles for winged bean. In Malaysia, vegetable pod yields up to 35 t ha-1 over a 25-week growing period have been obtained from solidly trellised, branching cultivars. Ratooning the crop through a further two cycles covers the cost of the trellising. Tubers from un-trellised field crops in Myanmar, and of staked, pruned garden crops in highland PNG have been estimated to produce crude protein yields of at least 300 kg ha-1 and 600 kg ha-1, respectively. Synergies between the gene-pools and cultural traditions would be expected to expand the range, raise the yield and stabilize the quality of tuber crop production. Researchers in Sri Lanka intercropped maize with winged bean. At optimal plant densities, they recorded a corn cob yield of 5 t ha-1 together with a cumulative winged bean fresh pod yield of 27 t ha-1. In Kentucky (380N), the combination of maize with winged bean to produce silage resulted in 11-18% greater biomass with 39-67% greater nitrogen per hectare than maize monocrop control plots. Branching winged bean cultivars have significant potential for benign, high-nitrogen cover and forage crops. Promiscuous nodulation and the development of storage root-systems compensate for slow initial top growth which then accelerates to produce a substantial yield of highly digestible leaf protein and vitamins. Hard-seededness and daylength-sensitive phenology are significant, surmountable, barriers to an expanded role for winged beans.

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“…Some tuber forming varieties of winged beans reproduce from tuber. Formation of tuber is vertical factor and influenced bv environmental J factors viz., temperature, day length/planting date and certain cultural practices (Kort and Cadwell, 1984). Tuber initiation is observed in plants under photoperiod below 20 h (Schiavinato and Valio, 1996).…”

Section: Winged Beanmentioning

confidence: 99%

Pulse productivity : physiological constraints /

Panwar¹,

Srivastava²

2012

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With these considerations, authors have tried to incorporate chapters on production and productivity scenario, canopy and root development, biological nitrogen fixation, physiology of growth and yield components, light and water-use efficiency, physiological aspects of pulse-cereal intercropping and nutritional qualities concerned with all major and minor pulses, viz. chickpea, pigeonpea, MULLaRP , and arid legumes (cowpea, moth bean, guar, winged bean), grown in different agro-ecological regions of India. A brief botany, origin and economic uses have also been covered. Chapters on ideal plant type as well as molecular basis to face challenges in pulse production are also incorporated. In the light of global climate change, a chapter on effect of greenhouse gases and global warming in pulses has been specifically included in this book. The book will fulfill the growing needs of all students and researchers of agricultural sciences in general, and of crop physiology in particular, concerned with pulses in Indian context.

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Characteristics of the proteins of the tubers of winged bean (Psophocarpus tetragonolobus (L.) DC)

Cited by 12 publications

References 20 publications

Trypsin Inhibitors of Winged Bean Tubers (Psophocarpus Tetragonolobus): Purification and Properties

Trypsin Inhibitors of Winged Bean Tubers (Psophocarpus Tetragonolobus): Purification and Properties

Review: Winged bean (Psophocarpus tetragonolobus) cropping systems

Pulse productivity : physiological constraints /

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