Effect of Temperature and Photoperiod on Flower Bud Initiation in Everbearing Type Strawberry Cultivars.

Kumakura, Hiroshi; Shishido, Yoshihiro

doi:10.2503/jjshs.64.85

Cited by 18 publications

(14 citation statements)

References 4 publications

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“…Above this temperature the fruit size decreased and yield started to fall, even though fruit number continued to increase up to 27°C. Our results are consistent with those of Kumakura and Shishido (1995), who found temperatures between 20°C and 25°C to be best for flowering in four everbearing strawberry cultivars ('Everberry', 'Enrai', 'Summerberry' and 'Hecker'). This is different to the trend found in Junebearers, where a temperature optimum of 18°C was found for fruit dry matter production by Heide (1977).…”

Section: Discussionsupporting

confidence: 94%

Analysis of shade and temperature effects on assimilate partitioning in the everbearing strawberry ‘Everest’ as the basis for optimised long-season fruit production

Wagstaffe

Battey

2004

The Journal of Horticultural Science and Biotechnology

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Section: Discussionsupporting

confidence: 94%

Analysis of shade and temperature effects on assimilate partitioning in the everbearing strawberry ‘Everest’ as the basis for optimised long-season fruit production

Wagstaffe

Battey

2004

The Journal of Horticultural Science and Biotechnology

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“…In some subtropical areas such as high-elevation areas in Thailand, the June-bearing 'Tioga' is adaptable to the environments but its yield and fruit quality are unsatisfactory (Pipattanawong, 1996). During summer production of strawberry in Japan, high temperature increased small and unmarketable strawberry fruits (Kumakura and Shishido, 1995). Therefore, to increase the marketable fruit yield for summer production in temperate areas and to extend the harvesting season in subtropical areas, studies on the effect of high temperature (HT) on fruit malformation of June-bearing strawberry are necessary.…”

Section: Introductionmentioning

confidence: 99%

Effects of High Temperature on Pollen Quality, Ovule Fertilization and Development of Embryo and Achene in ‘Tochiotome’ Strawberry

Pipattanawong

Yamane

Fujishige

et al. 2009

J. Japan. Soc. Hort. Sci.

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Effects of high temperature (HT) on pollen quality, ovule fertilization and development of embryo and achene were investigated in relation to fruit malformation in 'Tochiotome' strawberry (Fragaria × ananassa Duch.). When the flower bud of the first inflorescence was developing, plants were transferred to HT (32/27°C) and control temperature (CT: 27/22°C) rooms. At anthesis, anthers were collected from flowers in the first (1st) and second (2nd) inflorescences to examine pollen viability and germination. Both viability and germination were not significantly different between the two temperatures and inflorescences. Approximately 90-93% of ovules were fertilized under CT in both inflorescences; however, the fertilized percentage of ovules in HT-1st was only 52% and significantly increased to 85% in HT-2nd. Embryo development in both inflorescences was accelerated by HT: embryos from HT regimes were in heart-and torpedo-shaped stages at 6 and 8 DAP while those of CT were still in globular-and heart-shaped stage. The transverse and longitudinal lengths of embryos under HT increased more rapidly than under CT. Embryo abortion in the globular stage was found at 2 and 6 DAP under HT-2nd. Relationships between the percentages of three types of achenes (unfertilized (Un), aborted (Ab), and normally developed (Nd) achenes) and degrees of fruit malformation were examined. Ripe fruits were graded into five fruit shape scores (0-4), 0 = well shaped fruit, and 4 = severely malformed. Nd achenes in CT-1st and CT-2nd were approximately 70% with fruit shape score; 0.8 and 0.2, respectively, whereas those in HT-1st and HT-2nd were 38 and 54% with high malformed shape score: 2.8 and 1.8. Un achene in HT-1st was 45%, while only 9% was found in HT-2nd. The Ab achenes rate was remarkably increased to 31% in HT-2nd treatment, these suggesting that the sudden rise of temperature after flower bud initiation lowered the ovule fertilization rate and raised the unfertilized achene rate, resulting in a high degree of fruit malformation in HT-1st, while longer HT increased achene abortion during early embryogenesis due to low pistil potential, and finally induced fruit malformation in HT-2nd.

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“…This suggestion is supported by the data of Kumakura and Shishido (1995), who found that a large number of flower buds were aborted before anthesis during 30°C treatment in four everbearing cultivars ('Everberry', 'Enrai', 'Summerberry' and 'Hecker'). Whatever the cause, at the end of July and at the beginning of August, in this study, the abortion of emerged flowers manifested itself as thermodormant plants showing a lack of flowers and fruit.…”

Section: Discussionmentioning

confidence: 49%

Characterisation of the thermodormancy response in the everbearing strawberry ‘Everest’.

Wagstaffe

Battey

2006

The Journal of Horticultural Science and Biotechnology

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Effect of Temperature and Photoperiod on Flower Bud Initiation in Everbearing Type Strawberry Cultivars.

Cited by 18 publications

References 4 publications

Analysis of shade and temperature effects on assimilate partitioning in the everbearing strawberry ‘Everest’ as the basis for optimised long-season fruit production

Analysis of shade and temperature effects on assimilate partitioning in the everbearing strawberry ‘Everest’ as the basis for optimised long-season fruit production

Effects of High Temperature on Pollen Quality, Ovule Fertilization and Development of Embryo and Achene in ‘Tochiotome’ Strawberry

Characterisation of the thermodormancy response in the everbearing strawberry ‘Everest’.

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