Effect of Chilling and Accumulative Photo-Thermal Units on Flowering of Strawberry (<i>Fragaria</i> × <i>ananassa</i> Duch.)

Al-Madhagi, Isam; Al-Munibary, Mahassen; Al-Doubibi, Manssur Hasan

doi:10.2478/johr-2018-0013

Cited by 7 publications

(11 citation statements)

References 38 publications

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“…In our experiments carried out in unprotected strawberry orchards, the exogenous application of CKs caused an increase in the number of flowers and fruit size or weight, in treated plants, and this coincides with reports of other studies performed under protected conditions [45,[48][49][50][51][52][53][54]. Depending on the number of applications and concentration, CK applications have an evident influence on fruit formation, size, and weight, which could translate into an increase in yield.…”

Section: Exogenous Application In the Field Led To Changes In Flower ...supporting

confidence: 90%

The Role of Cytokinins during the Development of Strawberry Flowers and Receptacles

Pérez-Rojas,

Díaz-Ramírez,

Ortíz-Ramírez

et al. 2023

Plants

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Cytokinins play a relevant role in flower and fruit development and plant yield. Strawberry fruits have a high commercial value, although what is known as the “fruit” is not a “true” botanical fruit because it develops from a non-reproductive organ (receptacle) on which the true botanical fruits (achenes) are found. Given cytokinins’ roles in botanical fruits, it is important to understand their participation in the development of a non-botanical or accessory “fruit”. Therefore, in this work, the role of cytokinin in strawberry flowers and fruits was investigated by identifying and exploring the expression of homologous genes for different families that participate in the pathway, through publicly available genomic and expression data analyses. Next, trans-zeatin content in developing flowers and receptacles was determined. A high concentration was observed in flower buds and at anthesis and decreased as the fruit approached maturity. Moreover, the spatio-temporal expression pattern of selected CKX genes was evaluated and detected in receptacles at pre-anthesis stages. The results point to an important role and effect of cytokinins in flower and receptacle development, which is valuable both from a biological point of view and to improve yield and the quality of this fruit.

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Section: Exogenous Application In the Field Led To Changes In Flower ...supporting

confidence: 90%

The Role of Cytokinins during the Development of Strawberry Flowers and Receptacles

Pérez-Rojas,

Díaz-Ramírez,

Ortíz-Ramírez

et al. 2023

Plants

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“…Previous studies also indicated that vernalization of Yemen native strawberry varieties at 2 • C for 15 days during the first growing season resulted in a greater number of flowers than non-vernalized treatments. The chilling hour requirement is the main factor that induces strawberry flowering: too little or too much can damage the plants and decrease flowering and fruiting [21]. In addition, vernalization of red raspberry 'Polka' at 6 • C resulted in a higher percentage of flowering than at 18 • C. Low temperatures led to faster flowering than high temperatures [22].…”

Section: Discussionmentioning

confidence: 99%

Effects of Vernalization on Off–Season Flowering and Gene Expression in Sub-Tropical Strawberry cv. Pharachatan 80

et al. 2023

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Off-season strawberry production may diversify the yield, thereby increasing costs, but the environmental conditions are a limiting factor. This experiment aimed to study the effects of vernalization on off-season flowering and gene expression in sub-tropical strawberry cv. Pharachatan 80. The factorial (2 × 2) + 1 in a completely randomized design was used in this study. Factor A was the vernalization temperatures: 2 °C and 4 °C. Factor B was the vernalization periods: 1 week and 2 weeks, compared with non-vernalization (control). The expression profile of genes was determined after vernalization treatments. The results revealed an interaction between the two factors on the number of days it took the plants to bloom, the percentage of flowering, the number of inflorescences, the number of flowers per inflorescence and the number of flowers per plant, whereas the number of first flower bloom days, inflorescence length and flower size were not affected by the interaction between the two factors. Strawberry plants vernalized for 1 and 2 weeks at 2 °C showed earlier flowering (21.4 and 23.1 days, respectively) than did those vernalized at 4 °C (24.9 and 25.7 days, respectively). On the other hand, non-vernalized strawberry plants took longer to bloom, at 62.2 days. Strawberry plants vernalized at 2 °C for 2 weeks had the highest percentage of flowering, number of inflorescences, number of flowers per inflorescence and number of flowers per plant. The analysis on gene expression showed that VRN5, SOC1 and FT genes were upregulated after vernalization at 2 °C for 2 weeks, whereas gene expression of the control treatment was not detected. This study demonstrates that vernalization treatment could induce off-season flowering in sub-tropical strawberry cv. Pharachatan 80 by activating flowering genes.

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“…Wherever, the value of 10°C is a base tempera ture of strawberries (Almadhagi et al, 2018). In Fragaria vesca, higher temperatures were found to be critical for runner induction (Heide and Sønsteby, 2007).…”

Section: Temperature (T)mentioning

confidence: 99%

“…Flower initiation in strawberries requires chilling (Ito and Saito, 1962;Darrow, 1966;Kinet et al, 1993;Lieten, 1997;Almadhagi et al, 2018;Aldoubibi et al, 2021). For the best production and berry quality, both types of strawberries (EB and SB) required dif ferent amounts of chilling period before planting.…”

Section: Chilling Hour and Cold Storage (C)mentioning

confidence: 99%

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The habit of strawberry flowering is the key for runner propagation, where the photoperiod is the main environmental factor - A review

Al-Madhagi

2024

Adv. Hort. Sci.

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Despite the advancement of tissue culture in strawberry plant propagation, the degree of elite for field cultivation depends on forcing the plant to produce runners. The strawberry flower habit [everbearing (EB), seasonal berry (SB), short-day (SD), long-day (LD), and day-neutral (DN)] defines the method of encouraging the plant to generate runners, since the formation of runners is mostly influenced by genetic factors before being influenced by environmental factors. Stolon production, which occurs as a result of vying for resources under certain environmental circumstances, is the reverse of blossoming. Therefore, any stimulus that encourages stolon formation and vegetative growth limits the development of flower buds, which is necessary for elite propagation. Long photoperiod, temperature, chilling hour, or cold storage, and plant growth regulators (PGR) are cited as these variables. Temperature has a significant impact on runner development, although the long daily photoperiod (LD) remains the most crucial component in runner induction. However, when LD interacts with other factors like temperature, cold storage, and gibberellins, its efficiency is increased. Thus, based on the cultivars and the seasonal climate of the geographical location, the best approach for strawberry propagation is identified by optimising the planting date for propagation or adjusting the propagation circumstances.

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Effect of Chilling and Accumulative Photo-Thermal Units on Flowering of Strawberry (Fragaria × ananassa Duch.)

Cited by 7 publications

References 38 publications

The Role of Cytokinins during the Development of Strawberry Flowers and Receptacles

The Role of Cytokinins during the Development of Strawberry Flowers and Receptacles

Effects of Vernalization on Off–Season Flowering and Gene Expression in Sub-Tropical Strawberry cv. Pharachatan 80

The habit of strawberry flowering is the key for runner propagation, where the photoperiod is the main environmental factor - A review

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