Gibberellic acid-induced prolongation of the dormancy in tubers or rhizomes of several species of East Asian Dioscorea

Okagami, Nobuo; Tanno, Noriaki

doi:10.1007/bf00144592

Cited by 8 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This observation led them to suggest that inhibition of tuberization may be controlled by a GA other than GA 3 . Moreover, GA 3 has been reported to have dose-dependent induced prolongation or shortening of dormancy in tubers or rhizomes of East Asian Dioscorea (Okagami and Tanno 1993) and in potatoes (van Ittersum and Scholte 1993). Further investigations are required to elucidate the GA involvement in tuberization of different potato cultivars.…”

Section: Discussionmentioning

confidence: 99%

Effect of Pot Size and Timing of Plant Growth Regulator Treatments on Growth and Tuber Yield in Greenhouse-Grown Norland and Russet Burbank Potatoes

Bandara

Tanino

Waterer

1998

J Plant Growth Regul

View full text Add to dashboard Cite

The effects of pot size, timing of the application of paclobutrazol (PTZ) and gibberellic acid (GA 3 ), and the counteractive effect of these two compounds on growth and tuber yield of greenhouse-grown Norland and Russet Burbank potatoes were investigated. Plants were grown either in 1.5-liter pots (15 cm deep) or 3.0-liter pots (18 cm deep) and received a foliar application of either 1.5 mM PTZ or 9 × 10 −3 mM GA 3 at early or late stolon initiation. Some plants that had been foliar treated with 1.5 mM PTZ at early stolon initiation were foliar treated with 9 × 10 −3 mM GA 3 at late stolon initiation. PTZ reduced haulm length in both cultivars significantly, particularly when the treatment was applied at early stolon initiation, but the late treatment reduced haulm length only when growing in 3.0-liter pots. Irrespective of the timing of treatment, GA 3 increased haulm length in Norland growing in both pot sizes, but the treatment increased haulm length in Russet Burbank only when applied at late stolon initiation. GA 3 applied after PTZ did not overcome the growth-inhibiting effect of the PTZ treatment. The PTZ treatment effectively increased usable tuber number/plant (UTN) in Norland, but PTZ had no effect on UTN in Russet Burbank. PTZ reduced usable tuber weight/plant (UTW) only in Norland growing in 1.5-liter pots. By contrast, GA 3 increased UTN only when treated at late stolon initiation of 1.5-liter potgrown Norland, whereas the same treatment was effective when applied only at early stolon initiation for Russet Burbank. For Norland, the increase in UTN by early applied PTZ was reduced by the subsequent application of GA 3 . The use of 3.0-liter pots for minituber production in both Norland and Russet Burbank appears to have no advantage over growing in 1.5-liter pots, particularly when PTZ or GA 3 is used to enhance tuberization.

show abstract

Section: Discussionmentioning

confidence: 99%

Effect of Pot Size and Timing of Plant Growth Regulator Treatments on Growth and Tuber Yield in Greenhouse-Grown Norland and Russet Burbank Potatoes

Bandara

Tanino

Waterer

1998

J Plant Growth Regul

View full text Add to dashboard Cite

show abstract

“…Batatasins are abundant in mature tubers but levels decline during prolonged storage (Kim et al 2002 ). Exogenous gibberellins induce and extend dormancy in Chinese yam, suggesting that endogenous gibberellins participate in the induction and maintenance of dormancy (Okagami and Nagao 1971 ; Tanno et al 1992 ; Okagami and Tanno 1993 ). Accordingly, sprouting is inhibited by the application of gibberellins and is promoted by gibberellin inhibitors (Okagami and Nagao 1971 ).…”

Section: Botanical and Physiological Propertiesmentioning

confidence: 99%

“…The mechanisms behind the dual role of gibberellins in tuber enlargement and dormancy are not yet understood (Gong et al 2017 ). Interestingly, gibberellins appear to have opposing functions in yam and potato tubers, given that gibberellins are required to break dormancy in potato (Hartmann et al 2011 ; Rentzsch et al 2012 ) but extend dormancy in cultivated yams (Okagami and Tanno 1993 ; Craufurd et al 2001 ).…”

Section: Botanical and Physiological Propertiesmentioning

confidence: 99%

An underutilized orphan tuber crop—Chinese yam : a review

Epping¹,

Laibach

2020

Planta

View full text Add to dashboard Cite

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.

show abstract

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

Kondhare

2022

Auxins, Cytokinins and Gibberellins Signaling in Plants

View full text Add to dashboard Cite

Gibberellic acid-induced prolongation of the dormancy in tubers or rhizomes of several species of East Asian Dioscorea

Cited by 8 publications

References 7 publications

Effect of Pot Size and Timing of Plant Growth Regulator Treatments on Growth and Tuber Yield in Greenhouse-Grown Norland and Russet Burbank Potatoes

Effect of Pot Size and Timing of Plant Growth Regulator Treatments on Growth and Tuber Yield in Greenhouse-Grown Norland and Russet Burbank Potatoes

An underutilized orphan tuber crop—Chinese yam : a review

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

Contact Info

Product

Resources

About