Effects of Temperature and Water Stress on the Growth and Yield of Winged Bean(Psophocarpus Tetragonolobus(L.) DC.)

Growth and Nutrient Accumulation of Winged Bean and Velvet Bean as Cover Crops in a Subtropical Region

“…The late fl owering stage of winged bean in our study may have been related to the delay in achieving the day/night temperatures of 24.5/20.1ºC that favors flowering, which occurred in November (Japan Meteorological Agency, 2008). This is similar to the findings reported previously (Wong and Schwabe, 1979;Ruegg, 1981;Schiavinato and Valio, 1996).…”

Winged bean (Psophocarpus tetragonolobus (L.) DC.) for food and nutritional security: synthesis of past research and future direction

“…Moreover, in a following experiment, when UPS99 seedlings were raised in inductive conditions of 20 °C mean temperature and 8-h daylength until second trifoliate leaf stage, they continued to produce plentiful buds even when the daylength was subsequently extended to 16 h (8-h natural light and 8-h incandescent light). The relative stability of the phenology of UPS99 in response to photothermal variability (Rüegg 1981;Uemoto et al 1982;Eagleton 1983), was also reported in the first international (12 tropical and subtropical locations ranging from 1°N, Singapore to 27°N, Nepal) replicated field trials in which UPS99 was the earliest to flower among ten PNG and three Asian accessions. Even so, the overall mean for the number of days to flower across all sites was as much as 62 days after sowing (DAS) for UPS99, 67 DAS for all PNG accessions taken as a group, and 87 DAS for the mean of the three Asian accessions (Anonymous 1981;Eagleton et al 1985).…”

“…Flowering was observed only in the 11-h photoperiod in a 25/20 °C temperature, with PNG accessions producing significantly more racemes 14and flowers (31) within the first 60 days of growth, compared to Sri Lankan material (average of 5 racemes and 15 flowers), where 3 accessions failed to flower completely. By contrast, Rüegg (1981) found that in short daylength (12 h) the actual time to flowering in accessions from PNG, Nigeria, Ghana, and Costa Rica was shortened by warmer temperatures (27/23 °C) compared to cooler conditions (22/18 °C), leading to the highest grain yield for all accessions in the experiment. The UPS99 accessions (PNG) was among the earliest to flower under the optimal experimental conditions, and the least affected under lower temperature compared to the other accessions.…”

“…The TPt8-ETH1 variant also gave the highest yield of root tubers, 939 g/m 2 when all plots were harvested in mid-August, 8 months after planting. Rüegg (1981) demonstrated that Tpt8 and UPS122 produced higher tuber yield at 22/18 °C than at 27/23 °C, the reverse of what was found for pod and seed yields. This concurred with the findings of extensive multisite field trials in PNG which showed that upland locations produced higher tuber yields on average than lowland sites; while, again, the reverse was the case for pod yields, as suggested by Kesavan, and Stephenson and colleagues (Anonymous 1981).…”

“…1. growth and phenology assessment in different growing conditions (Herath and Ormrod 1979;Anonymous 1980Anonymous , 1981Anonymous , 1982Rüegg 1981;Misra and Misra 1985;Okubo et al 1992); 2. development of high seed-yielding varieties (Nangju and Baudoin 1979;Erskine 1981a;Arumugan and Perera 1989); 3. nutritional profiling of edible parts (Anonymous 1980;Kortt 1980;Gross 1983;Kadam et al 1984;Prakash et al 1987); 4. nodulation ability (Hildebrand et al 1981c;Iruthayathas and Herath 1981;Vlassak 1982, 1987;Iruthayathas et al 1985) and 5. biotic and abiotic-stress tolerance studies (Karikari 1978;Thompson and Haryono 1979;Rüegg 1981;Price et al 1982;Weil and Khalil 1986;Prakash et al 1987).…”