Seasonal Variations in Pollen Germination Ability, Reproductive Function of Pistils, and Seeds and Fruit Yield in Papaya (Carica papaya L.) in Okinawa

Tamaki, Maro; Urasaki, Naoya; Sunakawa, Yoshinobu; Motomura, Keiji; Adaniya, Shinichi

doi:10.2503/jjshs1.80.156

Cited by 13 publications

(12 citation statements)

References 4 publications

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“…The high temperature prevailing with relatively higher humidity inside the polyethylene cage might had decrease the activity of pollenizer or may cause desiccation or abortment of pollen in the flower. Quite similar study were also reported by Tamaki et al, (2011) while conducting an experiment on seasonal variations flowering, seed and fruit yield in papaya.…”

Section: Flower Drop (%)supporting

confidence: 55%

Feasibility of Caging Material for True-To-Type Seed Production in Papaya (Carica papaya L.) under New Alluvial Zone of West Bengal

Uchoi¹,

Reang²,

Sarkar³

2018

Int.J.Curr.Microbiol.App.Sci

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Section: Flower Drop (%)supporting

confidence: 55%

Feasibility of Caging Material for True-To-Type Seed Production in Papaya (Carica papaya L.) under New Alluvial Zone of West Bengal

Uchoi¹,

Reang²,

Sarkar³

2018

Int.J.Curr.Microbiol.App.Sci

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“…In C. papaya 'Cartagena', pollen germination increases as flower type approaches perfect maleness (Parés-Martínez et al, 2006); no perfect male flowers were observed in the present study. The degree of germination during summer is similar to the hermaphroditic 'Sunrise Solo' according to Tamaki et al (2011), who indicate that the season of the year is a factor that influences germination capacity and is mainly due to temperature. Caetano et al (2008) …”

Section: Pollen Germinationmentioning

confidence: 64%

“…Both ambisexual and female plants affect final production and female plants are preferred because of their higher quality fruit; this does not occur in C. papaya where hermaphroditic plants are preferred for fruit shape (Tamaki et al, 2011). To overcome this characteristic of mountain papaya, the nursery provides a unit consisting of three or four plants originating from seeds of unknown sex and the farmer thins outs the male plants 8-10 mo after planting in the orchard at the beginning of spring.…”

Section: Introductionmentioning

confidence: 99%

Floral expression and pollen germination ability in productive mountain papaya (Vasconcellea pubescens A.DC.) orchards

Salvatierra-González

Jana-Ayala

2016

Chilean J. Agric. Res.

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Mountain papaya (Vasconcellea pubescens A.DC.) is described as trioecious in the centers of origin of Ecuador, Colombia, and Peru. However, under cultivation conditions in La Serena (30° S, 70° W), Chile, it is found to be dioecious and monoecious. The objective was to learn about the variations in floral expression of mountain papaya. Flowers from monoecious and dioecious plants were therefore identified and quantified during two seasons. In vitro pollen germination ability was also evaluated based on the factors of site, season, and plant sex. Monoecious plant inflorescences are polygamous; female and male flowers are observed, as well as bisexual flowers that are usually deformed. This condition allows them to be classified as an ambisexual plant. The existence of flowers of different sexes appears to depend on the season; the female dioecious plant is maintained as such, independently of climatic conditions. Pollen from male flowers, from both ambisexual and male plants, germinates 75% in summer, while germination decreases to 56% in spring (P ≤ 0.05). Flowering of female plants coincides with the permanent occurrence of male flowers in ambisexual plants, which ensures pollination without the need for male plants as pollinators in orchards. Based on this information, some management practices and possible lines of research about this species are proposed.

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“…Tamaki et al (2011) evaluated the effects of seven constant temperatures in papaya and reported significant differences in the growth of pollen tubes. According to the authors, most well-developed pollen tubes were observed at 25 °C, followed by 20, 30, 15 and 35 °C, whereas the shortest pollen tube lengths were observed at 40 °C.…”

Section: Resultsmentioning

confidence: 99%

“…This subject has been studied in several different crops such as pistachios (Acar and Kakami, 2010), peaches (Hedhly et al, 2005), peanuts (Kakani et al, 2002), cotton (Kakani et al, 2005), sorghum (Prasad et al, 2011), Capsicum (Reddy and Kakani, 2007) and papaya (Tamaki et al, 2011). Based on their findings, these authors have defined the cardinal temperatures: the minimum temperature (T min ) at which pollen grains germinate, the optimal temperature at which the pollen grain germination reaches the maximum (T opt ) and the maximum temperature (T max ) after which pollen grain germination does not occur.…”

Section: Introductionmentioning

confidence: 99%

Determination of cardinal temperatures for sugar apple ( Annona squamosa L.)

et al. 2016

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The sugar apple is highly dependent on the pollination and fruit tree pollen performance is crucial for successful fertilization and fruit set. The objective of this study was to determine the cardinal temperatures for in vitro pollen grains germination and evaluate the effect of temperature on pollen tube growth of sugar apple. The experimental design was in a completely randomized with eight treatments (10, 15, 20, 25, 30, 35, 40 and 45 ºC), four replicates and each plot was constituted by two slides per parcel. The cardinal temperatures were determined by evaluating in vitro germination of pollen grains and pollen tube growth in standard culture medium. It also assessed the pollen tube growth and the percentage of germination in vitro depending on the type of pollen grain arrangement (monad, dyad, triad and tetrad). In vitro germination of pollen grains and pollen tube growth varied significantly with temperature. The maximum germination recorded (48.13 %) and the maximum lengths of pollen tubes (536.45 μm) were obtained when pollen grains were cultivated at 25 ºC. The estimated cardinal temperatures were 9.7, 26.9 and 44.2 ºC. Among the pollen grain arrangements, tetrads pollen grains were observed in higher proportions, however, monads pollen grains presented higher germination percentage. Index terms:In vitro germination; pollen viability; monads; tetrads; pollen tube. RESUMOA pinheira é uma fruteira altamente dependente da polinização e o desempenho do pólen é determinante para o sucesso da fertilização e frutificação efetiva. O objetivo deste trabalho foi determinar as temperaturas cardinais para a germinação in vitro dos grãos de pólen e avaliar o efeito de diferentes temperaturas no crescimento dos tubos polínicos de pinheira. O delineamento experimental foi o inteiramente casualizado, com oito tratamentos (10, 15, 20, 25, 30, 35, 40 e 45 ºC), quatro repetições, sendo cada parcela experimental constituída por duas lâminas. As temperaturas cardinais foram determinadas por meio da avaliação da germinação in vitro dos grãos de pólen e do crescimento do tubo polínico em meio de cultura padrão. Avaliou-se também o crescimento do tubo polínico e o percentual de germinação in vitro em função do tipo de arranjo do grão de pólen (mônade, díade, tríade e tétrade germinados). A germinação in vitro dos grãos de pólen e o crescimento dos tubos polínicos da pinha variou significativamente com a temperatura. A máxima germinação in vitro registrada (48,13 %) e o máximo comprimento dos tubos polínicos (536,45 µm) foram obtidos quando os grãos de pólen foram cultivados a 25 °C. As temperaturas cardinais estimadas foram 9,7, 26,9 e 44,2 ºC. Dentre os arranjos de grãos de pólen, foi observada maior percentagem de tétrades, no entanto, os grãos de pólen do tipo mônades apresentaram maiores porcentagem de germinação.Termos para indexação: Germinação in vitro; viabilidade polínica; mônades; tétrades; tubo polínico.

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Seasonal Variations in Pollen Germination Ability, Reproductive Function of Pistils, and Seeds and Fruit Yield in Papaya (Carica papaya L.) in Okinawa

Cited by 13 publications

References 4 publications

Feasibility of Caging Material for True-To-Type Seed Production in Papaya (Carica papaya L.) under New Alluvial Zone of West Bengal

Feasibility of Caging Material for True-To-Type Seed Production in Papaya (Carica papaya L.) under New Alluvial Zone of West Bengal

Floral expression and pollen germination ability in productive mountain papaya (Vasconcellea pubescens A.DC.) orchards

Determination of cardinal temperatures for sugar apple ( Annona squamosa L.)

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