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Early-season culture of water yam was required in Yaku Island, because of the long growing period, the concentrating work at the harvesting time, the lack of storehouse and so on. Thus we tried to search the early-maturing strains and use a plant growth regulator that promote the tuber enlargemen...


Onjo, M.Shiwachi, H.Hayashi, M.[Possibility of earlyseason culture of water yam (Dioscorea alata L.) in Yaku island]Possibility of earlyseason culture of water yam (Dioscorea alata L.) in Yaku island

A reliable means to induce sprouting in dormant seed tubers of yams (Dioscorea species) is required to enhance flexibility in planting date and rate of propagation of the crop. Experiments were conducted to assess the potential of two gibberellin inhibitors, Uniconazole-P and Prohexadione-calcium...


Shiwachi, H.Ayankanmi, T.G.Asiedu, RobertOnjo, M.[Induction of germination in dormant yam (Dioscorea spp.) tubers with inhibitors of gibberellins]Induction of germination in dormant yam (Dioscorea spp.) tubers with inhibitors of gibberellins

To analyze the mechanism of dormancy in tubers of water yam (Dioscorea alata L.), we studied the relationship between external factors and dormancy and its release in tubers. Several strains of water yam that have been introduced into Japan from Southeast Asia and Oceania were grown in Kagoshima,...


Park, B.J.Onjo, M.Tominaga, S.Shiwachi, H.Hayashi, M.[Relationship between dormancy and its release and external factors in tubers of water yam (Dioscorea alata L.)]Relationship between dormancy and its release and external factors in tubers of water yam (Dioscorea alata L.)

This study clarified we could effectively distinguish mixed water yam strains by observing the differences of morphology of the leaves and tubers in Yaku Island. However, there are considerable variations in morphology, so we may be able to more confidently distinguish strains by also employing t...


Onjo, M.Matsuo, T.Hakariya, S.Shiwachi, H.Hayashi, M.[Distinction of mixed yam strains (Dioscorea alata L.) cultivated in Yaku Island]Distinction of mixed yam strains (Dioscorea alata L.) cultivated in Yaku Island

To induce sprouting two gibberellin inhibitors, uniconazole-P (UP) and prohexadione-calcium (PC), were applied to foliage of white Guinea yam (Dioscorea rotundata) and water yam (D. alata) 30 days before harvest or to tubers at harvest. The tuber sprouting period was shortened by about 35 days in...


Shiwachi, H.Ayankanmi, T.G.Asiedu, RobertOnjo, M.[Influence of exogenous gibberellins inhibitors on tuber sprouting in yam]Influence of exogenous gibberellins inhibitors on tuber sprouting in yam

A reliable means to induce sprouting in dormant seed tubers of yams (Dioscorea species) is required to enhance flexibility in planting date and rate of propagation of the crop. Experiments were conducted to assess the potential of two gibberellin inhibitors, Uniconazole-P and Prohexadione-calcium...


Shiwachi, H.Ayankanmi, T.G.Asiedu, RobertOnjo, M.[Induction of sprouting in dormant yam (Dioscorea spp.) tubers with inhibitors of gibberellins]Induction of sprouting in dormant yam (Dioscorea spp.) tubers with inhibitors of gibberellins

Kikuno, H.Oladimeji, Z.Ebuehi, A.Shiwachi, H.Onjo, M.Asiedu, Robert[Effect of n-propyl dihydrojasmonate (PDJ) on in vitro growth of yam (Dioscorea spp.) explants]Effect of n-propyl dihydrojasmonate (PDJ) on in vitro growth of yam (Dioscorea spp.) explants

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