Effects of Local CO&lt;SUB&gt;2&lt;/SUB&gt; Enrichment on Strawberry Cultivation during the Winter Season

Miyoshi, Yuta; Hidaka, Kota; Okayasu, Takashi; Yasutake, Daisuke; Kitano, Masaharu

doi:10.2525/ecb.55.165

Cited by 20 publications

(8 citation statements)

References 21 publications

(19 reference statements)

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“…On the other hand, the photosynthetic rate was higher at 800 µmol mol −1 CO 2 than 400 µmol mol −1 CO 2 (Figure 6). Miyoshi et al [26] reported that the day after CO 2 enrichment was started, the strawberry crop photosynthesis and photosynthetic-assimilate translocation from source leaves were promoted; the results in this study indicate the same. Based on this, it was thought that more photosynthetic products were produced at 800 µmol mol −1 CO 2 than 400 µmol mol −1 CO 2 , and as a result of the large amount of photosynthetic assimilates being translocated to primary fruit, which is the largest sink, primary fruit 24 days after flowering was significantly larger at 800 µmol mol −1 CO 2 than 400 µmol mol −1 CO 2 .…”

Section: Discussionsupporting

confidence: 70%

Effects of CO2 Enrichment on Yield, Photosynthetic Rate, Translocation and Distribution of Photoassimilates in Strawberry ‘Sagahonoka’

Tagawa

Ehara²,

Ito³

et al. 2022

Agronomy

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The method of automatically controlling the CO2 concentration in a greenhouse depending on ventilation was examined in order to efficiently improve the productivity of strawberries under the weather conditions in the northern part of Kyushu in Japan. The effects of CO2 enrichment on the yields, fruit Brix, and economic value of the strawberry ‘Sagahonoka’ were investigated. In addition, in order to clarify the physiological response of ‘Sagahonoka’ to the CO2 concentration, the photosynthetic rate, translocation, and photoassimilate distribution rate were measured. It was found that maintaining the CO2 concentrations above 800 μmol mol−1 and 400 μmol mol−1 during no ventilation and ventilation, respectively, resulted in 25% increases in marketable fruit yields and a 0.2–1.2% higher fruit Brix compared to control, which was kept in 400 μmol mol−1 CO2 or above all day regardless of ventilation. Additionally, the economic value of ‘Sagahonoka’ was increased. The photosynthetic rate of ‘Sagahonoka’ increased linearly up to 800 μmol mol−1 CO2, and high CO2 concentrations affected the distribution for the primary fruit, the most significant sink. It was clarified that CO2 enrichment at 800 μmol mol−1 for ‘Sagahonoka’ was effective in increasing the photosynthetic rate and distribution of photoassimilates to fruits, and the yields of strawberries could be increased efficiently by automatically controlling the CO2 concentration depending on ventilation in a southern region of Japan.

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Section: Discussionsupporting

confidence: 70%

Effects of CO2 Enrichment on Yield, Photosynthetic Rate, Translocation and Distribution of Photoassimilates in Strawberry ‘Sagahonoka’

Tagawa

Ehara²,

Ito³

et al. 2022

Agronomy

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“…Finally, a high-pressure gradient is generated and the phloem contents are pushed toward the sink organs (Maynard and Lucas, 1982;Lalonde et al, 1999;Hölttä et al, 2006), resulting in an enhanced photosynthate translocation from the sources to the sinks. Miyoshi et al (2017) analyzed the same strawberry cultivar used in this study and determined that increases in the intensity of the light received by the source leaves increase concentration of the leaf sucrose and promotes the photosynthate translocation from the leaves. Under the continuous lighting conditions of the PETIS imaging experiment, the photosynthetic rate was relatively stable during the light period, and the cumulated photosynthesis in the source leaves increased almost linearly (Figures 3B,C).…”

Section: Discussionmentioning

confidence: 99%

“…More specifically, sucrose, glucose, and fructose, which are the most abundant soluble solids in strawberry fruits, determine fruit sweetness (Perez et al, 1997;Todeschini et al, 2018). Because the fruit sugar content is greatly affected by the ambient environment, strawberry plants are increasingly being cultivated under controlled environmental conditions (e.g., light intensity, air temperature, and CO 2 concentration) (Neri et al, 2012;Hidaka et al, 2013Hidaka et al, , 2016Miyoshi et al, 2017;Samtani et al, 2019;Yoneda et al, 2020). During this protected cultivation, environmental conditions are modulated to promote leaf photosynthesis, which positively affects strawberry fruit yield and quality.…”

Section: Introductionmentioning

confidence: 99%

Non-invasive 11C-Imaging Revealed the Spatiotemporal Variability in the Translocation of Photosynthates Into Strawberry Fruits in Response to Increasing Daylight Integrals at Leaf Surface

et al. 2021

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The efficiency of photosynthate translocation from leaves to fruits directly affects dry matter partitioning. Therefore, controlling photosynthate translocation dynamics is critical for high-yield and high-quality fruit production. Accordingly, photosynthate translocation changes must be characterized using data obtained at a higher spatiotemporal resolution than those provided by conventional methods. In this study, 11C-photosynthate translocation into strawberry (Fragaria × ananassa Duch.) fruits in individual plants was visualized non-invasively and repeatedly using a positron emission tracer imaging system (PETIS) to assess the spatiotemporal variability in the translocation dynamics in response to increasing daylight integrals (i.e., 0.5-, 4.5-, and 9-h exposures to 400 μmol m–2 s–1 at the leaf surface). Serial images of photosynthate translocation into strawberry fruits obtained from the PETIS confirmed that 11C-photosynthates were translocated heterogeneously into each fruit on the same inflorescence. The amount of translocated 11C-photosynthates and the translocation rate into each fruit significantly increased as the integrated light intensity at the leaf surface increased. An analysis of the pedicel of each fruit also confirmed that the photosynthate translocation rate increased. The cumulated photosynthesis in leaves increased almost linearly during the light period, suggesting that an increase in the amount of photosynthates in leaves promotes the translocation of photosynthates from leaves, resulting in an increase in the photosynthate translocation rate in pedicels and enhanced photosynthate accumulation in fruits. Additionally, the distribution pattern of photosynthate translocated to fruits did not change during the light period, nor did the order of the sink activity (11C radioactivity/fruit dry weight), which is the driving force for the prioritization of the 11C-partitioning between competing organs, among fruits. Thus, this is the first study to use 11C-radioisotopes to clarify the spatiotemporal variability in photosynthate translocation from source leaves to individual sink fruits in vivo in response to increasing daylight integrals at a high spatiotemporal resolution.

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“…Strawberry production in protected facilities (greenhouses) has been globally increasing to enhance yield and quality of fruits by avoiding the adverse environments, and to extend harvest period to near year-round by the improvement of temperature environment (Neri et al, 2012; Garcia et al, 2017). In protected strawberry cultivation, an introduction of environmental control techniques, such as CO 2 enrichment, supplemental lighting has increased to enhance photosynthesis and improve fruit yield and quality (Sung and Chen, 1991; Deng and Woodward, 1998; Hidaka et al, 2013, 2016; Miyoshi et al, 2017). This requires optimizing both photosynthesis and photosynthate translocation into developing fruit.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Photosynthate Translocation Into Strawberry Fruits Using Non-invasive 11C-Labeling Supported With Conventional Destructive Measurements Using 13C-Labeling

et al. 2019

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In protected strawberry (Fragaria × ananassa Duch.) cultivation, environmental control based on the process of photosynthate translocation is essential for optimizing fruit quality and yield, because the process of photosynthate translocation directly affects dry matter partitioning. We visualized photosynthate translocation to strawberry fruits non-invasively with 11CO2 and a positron-emitting tracer imaging system (PETIS). We used PETIS to evaluate real-time dynamics of 11C-labeled photosynthate translocation from a 11CO2-fed leaf, which was immediately below the inflorescence, to individual fruits on an inflorescence in intact plant. Serial photosynthate translocation images and animations obtained by PETIS verified that the 11C-photosynthates from the source leaf reached the sink fruit within 1 h but did not accumulate homogeneously within a fruit. The quantity of photosynthate translocation as represented by 11C radioactivity varied among individual fruits and their positions on the inflorescence. Photosynthate translocation rates to secondary fruit were faster than those to primary or tertiary fruits, even though the translocation pathway from leaf to fruit was the longest for the secondary fruit. Moreover, the secondary fruit was 25% smaller than the primary fruit. Sink activity (11C radioactivity/dry weight [DW]) of the secondary fruit was higher than those of the primary and tertiary fruits. These relative differences in sink activity levels among the three fruit positions were also confirmed by 13C tracer measurement. Photosynthate translocation rates in the pedicels might be dependent on the sink strength of the adjoining fruits. The present study established 11C-photosynthate arrival times to the sink fruits and demonstrated that the translocated material does not uniformly accumulate within a fruit. The actual quantities of translocated photosynthates from a specific leaf differed among individual fruits on the same inflorescence. To the best of our knowledge, this is the first reported observation of real-time translocation to individual fruits in an intact strawberry plant using 11C-radioactive- and 13C-stable-isotope analyses.

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Effects of Local CO<SUB>2</SUB> Enrichment on Strawberry Cultivation during the Winter Season

Cited by 20 publications

References 21 publications

Effects of CO2 Enrichment on Yield, Photosynthetic Rate, Translocation and Distribution of Photoassimilates in Strawberry ‘Sagahonoka’

Effects of CO2 Enrichment on Yield, Photosynthetic Rate, Translocation and Distribution of Photoassimilates in Strawberry ‘Sagahonoka’

Non-invasive 11C-Imaging Revealed the Spatiotemporal Variability in the Translocation of Photosynthates Into Strawberry Fruits in Response to Increasing Daylight Integrals at Leaf Surface

Dynamic Analysis of Photosynthate Translocation Into Strawberry Fruits Using Non-invasive 11C-Labeling Supported With Conventional Destructive Measurements Using 13C-Labeling

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