Interactive Effects of Photoperiods and Plant Growth Regulators on the Development of Tubers and Flowering Spikes in Chinese Yam (Dioscorea opposita) cv. Nagaimo.

Yoshida, Yasunori; Takahashi, Harumi; Kanda, Hiroomi; Kanahama, Koki

doi:10.2503/jjshs.71.752

Cited by 8 publications

(14 citation statements)

References 9 publications

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“…Furthermore, Japanese yam SD plants had only one peak of spike development, whereas LD plants exhibited two peaks of spike development. This finding in Japanese yam significantly differs from the findings in Chinese yam, which exhibited only one peak of spike development (Yoshida et al, 2001(Yoshida et al, , 2002.…”

Section: Introductioncontrasting

confidence: 56%

“…Consequently, the main shoot lengths of both the 25gST-and 50gST-LD plants were longer than those grown under SD conditions in all growth periods. The shoot elongation period in LD plants was significantly extended as compared with that in Chinese yam (D. oppositifolia 'Ichoimo' and 'Nagaimo') (Yoshida et al, 2001(Yoshida et al, , 2002 and was similar to that in our previous study using Japanese yam (Yoshida et al, 2004). However, in the 25gST-LD plants, growth cessation occurred after early September (88 days after photoperiod treatments (DAPT)); this was approximately 1 month earlier than that observed in the 50gST-LD plants (mid-October, 121 DAPT) (Fig.…”

Section: Shoot Growthmentioning

confidence: 89%

“…It was clarified that the shoot elongation period under a 24-h photoperiod (constant light, LD) was significantly extended as compared with that in Chinese yam (D. oppositifolia 'Ichoimo' and 'Nagaimo') (Yoshida et al, 2001(Yoshida et al, , 2002. The continued vegetative growth severely delayed the growth of AT and NT under LD conditions.…”

Section: Introductionmentioning

confidence: 98%

“…The poor yields reflect the fact that the shoot diedback was due to the low temperature in winter prior to the 231 adequate partitioning of the photosynthates stored in the shoots for the growth of NT. Yoshida et al (2001Yoshida et al ( , 2002 showed that the inhibition of AT by gibberellin A 3 (GA 3 ) treatment partitioned the photosynthates stored in shoots for the growth of NT, as in the case of D. oppositifolia 'Ichoimo' and 'Nagaimo'. Japanese yams generally develop a large number of AT.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous study (Yoshida et al, 2004), we reported the relationship between the effects of photoperiods and plant growth regulators (PGRs) on the development of tubers and spikes in Japanese yams. It was clarified that the shoot elongation period under a 24-h photoperiod (constant light, LD) was significantly extended as compared with that in Chinese yam (D. oppositifolia 'Ichoimo' and 'Nagaimo') (Yoshida et al, 2001(Yoshida et al, , 2002.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Seed Tuber Weights on the Development of Tubers and Flowering Spikes in Japanese Yams (Dioscorea japonica) Grown under Different Photoperiods and with Plant Growth Regulators

康徳¹,

春實²,

啓臣³

et al. 2007

J. Japan. Soc. Hort. Sci.

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The effect of seed tuber (ST) weight on the development of main shoots, aerial tubers (bulbils, AT), new tubers (below ground, NT), and flowering spikes (inflorescences) was examined in Japanese yam plants (Dioscorea japonica) grown under different photoperiods and with plant growth regulators (PGRs). Within the same PGR and ST-weight group, the main shoot lengths of plants grown under a 24-h photoperiod (constant light, LD) were found to be longer than those grown under an 8-h photoperiod (SD) in all seasons. Furthermore, within the same photoperiod and ST-weight group, except for the plants grown from 25 g of ST (25gST plants) under SD conditions, the main shoot lengths of control and gibberellic acid (GA 3 )-treated plants were found to be longer than those of uniconazole-P (Uni)-treated plants. These tendencies were stronger in the 50gST plants than in the 25gST plants. In the 25gST plants, the final fresh weight (FW) of NT and the combined FW of AT and NT were greater in plants grown under LD conditions (LD plants) than those of SD plants; however, this was not observed in the case of the 50gST plants. This is because AT and NT development commenced earlier in the 25gST plants than in the 50gST plants. Furthermore, in the case of the 25gST-LD plants, the control plants also produced a few AT. Hence, we could confirm that the yield of NT was slightly increased by the inhibition of AT in the GA 3 -treated plants. The 25gST or 50gST-SD plants had only one peak of spike development from June through July, whereas the 25gST or 50gST-LD plants had two peaks of spike development, that is, in June and July and then again from September through October. In the season (June to July) of early spike development, the number of spikes per LD plant was greater than that in the SD plants, and the total number of spikes per plant was inhibited by GA 3 treatment. These tendencies were stronger in the 50gST plants than in the 25gST plants.

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Section: Introductioncontrasting

confidence: 56%

Section: Shoot Growthmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Seed Tuber Weights on the Development of Tubers and Flowering Spikes in Japanese Yams (Dioscorea japonica) Grown under Different Photoperiods and with Plant Growth Regulators

康徳¹,

春實²,

啓臣³

et al. 2007

J. Japan. Soc. Hort. Sci.

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Phytohormone Profiling During Tuber Development of Chinese Yam by Ultra-high performance Liquid Chromatography–Triple Quadrupole Tandem Mass Spectrometry

Gong

Luo

Wang

et al. 2016

J Plant Growth Regul

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An underutilized orphan tuber crop—Chinese yam : a review

Epping¹,

Laibach

2020

Planta

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Main conclusion The diversification of food crops can improve our diets and address the effects of climate change, and in this context the orphan crop Chinese yam shows significant potential as a functional food. Abstract As the effects of climate change become increasingly visible even in temperate regions, there is an urgent need to diversify our crops in order to address hunger and malnutrition. This has led to the re-evaluation of neglected species such as Chinese yam (Dioscorea polystachya Turcz.), which has been cultivated for centuries in East Asia as a food crop and as a widely-used ingredient in traditional Chinese medicine. The tubers are rich in nutrients, but also contain bioactive metabolites such as resistant starches, steroidal sapogenins (like diosgenin), the storage protein dioscorin, and mucilage polysaccharides. These health-promoting products can help to prevent cardiovascular disease, diabetes, and disorders of the gut microbiome. Whereas most edible yams are tropical species, Chinese yam could be cultivated widely in Europe and other temperate regions to take advantage of its nutritional and bioactive properties. However, this is a laborious process and agronomic knowledge is fragmented. The underground tubers contain most of the starch, but are vulnerable to breaking and thus difficult to harvest. Breeding to improve tuber shape is complex given the dioecious nature of the species, the mostly vegetative reproduction via bulbils, and the presence of more than 100 chromosomes. Protocols have yet to be established for in vitro cultivation and genetic transformation, which limits the scope of research. This article summarizes the sparse research landscape and evaluates the nutritional and medical applications of Chinese yam. By highlighting the potential of Chinese yam tubers, we aim to encourage the adoption of this orphan crop as a novel functional food.

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Interactive Effects of Photoperiods and Plant Growth Regulators on the Development of Tubers and Flowering Spikes in Chinese Yam (Dioscorea opposita) cv. Nagaimo.

Cited by 8 publications

References 9 publications

Effect of Seed Tuber Weights on the Development of Tubers and Flowering Spikes in Japanese Yams (Dioscorea japonica) Grown under Different Photoperiods and with Plant Growth Regulators

Effect of Seed Tuber Weights on the Development of Tubers and Flowering Spikes in Japanese Yams (Dioscorea japonica) Grown under Different Photoperiods and with Plant Growth Regulators

Phytohormone Profiling During Tuber Development of Chinese Yam by Ultra-high performance Liquid Chromatography–Triple Quadrupole Tandem Mass Spectrometry

An underutilized orphan tuber crop—Chinese yam : a review

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