Tuber Germination and Early Growth in Four Edible Dioscorea Species

Wickham, Lynda D.; Wilson, Lawrence A.; Passam, H. C.

doi:10.1093/oxfordjournals.aob.a086003

Cited by 21 publications

(31 citation statements)

References 3 publications

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“…Anatomically, tubers from all treatments of D. alata displayed a peripheral pattern identical to control tubers (Wickham et al 1981). Anatomical examination of Chinese Yam tubers treated with IAA revealed a multi-layered region of comparatively small cells towards the lower portion of many of the tubers.…”

Section: Tuber Morphology and Developmentmentioning

confidence: 88%

“…The synthetic auxin presumably persisted in the tuber system causing suppression of shoot development while stimulating root production, once dormancy was broken. These roots were not normal tuber roots originating from the tuber germinating meristem (Wickham et al 1981) but were instead produced from callus areas.…”

Section: Discussionmentioning

confidence: 99%

“…Moist conditions were realized by storage of tubers and bulbils in perforated plastic bags containing pieces of cotton wool which were kept saturated with water. For anatomical examination, tuber sections were treated as previously described (Wickham et al 1981).…”

Section: Methodsmentioning

confidence: 99%

“…Also since yam tubers are predisposed to pathogenic attack due to cuts, scrapes, bruises and other physical damage sustained during and after harvest (Passam, Read & Rickard, 1976) a minimum of post-harvest treatment is desirable. Since it was shown earlier that this extension of tuber dormancy was accompanied by the suppression of the development of the tuber germination meristem (Wickham, Wilson & Passam, 1981) which preceded bud initiation, it was decided to investigate whether such suppression could be effected by preharvest treatment. In contrast to GA 3 , post-harvest application of other growth regulators, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Tuber development, storage and germination in yams (Dioscorea spp.) in response to pre-harvest application of plant growth regulators

1984

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When pre-harvest foliar applications of growth regulators were made to vines of Dioscorea esculenta cv. Chinese Yam and D. alata cv. White Lisbon there were no obvious effects on tubers of D. alata, but dramatic effects on tuber development, storage and germination were obtained with D. esculenta tubers. Gibberellic acid caused marked extensions in tuber dormancy, 2,4-dichlorophenoxyacetic acid resulted in marked callus development, delayed germination and abnormal shoot and root development and indole acetic acid resulted in fingering of the tubers. It was concluded that there was potential for commercial exploitation of pre-harvest gibberellic acid treatments in extension of dormancy in Chinese Yam tubers and that the lack of response of D. alata tubers to foliar application of growth regulators warranted further investigation.

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Section: Tuber Morphology and Developmentmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tuber development, storage and germination in yams (Dioscorea spp.) in response to pre-harvest application of plant growth regulators

1984

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“…Wickham et al 35 noted that the PNC is the organ of renewed growth and that its germination suppresses shoot development in the tuber. The PNC, or rather the preformed buds present on it, also seems to control the site of sprouting in our experiment.…”

Section: The Role Of the Primary Nodal Complexmentioning

confidence: 99%

Improving the application of gibberellic acid to prolong dormancy of yam tubers (Dioscorea spp)

et al. 2003

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With the aim of reducing the cost and time needed to treat yam tubers with gibberellic acid (GA 3 ), this study compared several new methods of application with the established dipping procedure (150 mg kg −1 for 1 h). Both GA 3 -containing soil paste (25 mg kg −1 ) and gelatinized starch (860 mg kg −1 ) were applied to tuber heads of Dioscorea alata and D cayenensis-rotundata in the Ivory Coast. Soil paste, gelatinized starch and dipping consistently prolonged dormancy and reduced fresh matter losses by 23-39% in D cayenensis-rotundata 3-year means. Although dipping reduced the storage losses most efficiently, soil paste and gelatinized starch used considerably less GA 3 . Both new treatments were easily prepared and quickly applied. Soil paste was most effective when the treatment was repeated before the end of dormancy. The third new method, spraying the tubers with a GA 3 solution (150 mg kg −1 ), was not effective. In general, the optimal time of application was immediately post-harvest. For D alata, treatment only 1 month after harvest was particularly ineffective, whereas D cayenensis-rotundata tubers could be treated with some effect up to the end of dormancy. To achieve extended storage periods of healthy tubers of D cayenensis-rotundata, GA 3 application may be recommended as post-harvest practice.

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Phytohormone-Mediated Regulation of Sprouting in Tuber and Storage Root Crops

Kondhare

2022

Auxins, Cytokinins and Gibberellins Signaling in Plants

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Tuber Germination and Early Growth in Four Edible Dioscorea Species

Cited by 21 publications

References 3 publications

Tuber development, storage and germination in yams (Dioscorea spp.) in response to pre-harvest application of plant growth regulators

Tuber development, storage and germination in yams (Dioscorea spp.) in response to pre-harvest application of plant growth regulators

Improving the application of gibberellic acid to prolong dormancy of yam tubers (Dioscorea spp)

Phytohormone-Mediated Regulation of Sprouting in Tuber and Storage Root Crops

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