Partitioning of photosynthates originating from bent shoots in the arching and high-rack culture systems of cut rose production

Kajihara, Seiji; Itou, Junki; Katsutani, Noritoshi; Goto, T.; Shimaji, Hideo

doi:10.1016/j.scienta.2009.03.005

Cited by 6 publications

(13 citation statements)

References 16 publications

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“…The translocation rate in this study was relatively low compared to the reports of Kajihara et al (2009) and Mor and Halevy (1980). Kajihara et al (2009) did their experiment from the end of June to the beginning of July. On the other hand, we treated the plants with 13 CO 2 in October when the amount of solar radiation and temperature were relatively low.…”

Section: Discussioncontrasting

confidence: 63%

“…We fed 13 CO 2 to bent shoots at different harvest shoot stages of rose plants trained by the MA technique. The 13 CO 2 concentration at the start of feeding was set at about 10,000 ppm, following Kajihara et al (2009). It is predicted that the stable isotope ratio fluctuates according to environmental conditions and respiration.…”

Section: Discussionmentioning

confidence: 99%

“…Between the flower budding stage and the blooming stage, there is a turning point at which the harvest shoots change from a sink to an autotrophic part. Kajihara et al (2009) studied the partitioning of 13 CO 2 using the blooming stage of rose plants trained by a high-rack technique, and reported that 51-70% of photosynthates produced by the bent shoots were translocated to other plant parts within 72 h. Most of them were partitioned to roots, crowns, and mother stems. The translocation rate in this study was relatively low compared to the reports of Kajihara et al (2009) and Mor and Halevy (1980).…”

Section: Discussionmentioning

confidence: 99%

“…Kajihara et al (2009) studied the partitioning of 13 CO 2 using the blooming stage of rose plants trained by a high-rack technique, and reported that 51-70% of photosynthates produced by the bent shoots were translocated to other plant parts within 72 h. Most of them were partitioned to roots, crowns, and mother stems. The translocation rate in this study was relatively low compared to the reports of Kajihara et al (2009) and Mor and Halevy (1980). Kajihara et al (2009) did their experiment from the end of June to the beginning of July.…”

Section: Discussionmentioning

confidence: 99%

“…The high-rack technique is an improved method of the A technique, in which some thick shoots (mother stems) developing from a crown are cut and left at a certain length when harvested; the growers then harvest the shoots that develop from those mother stems. Kajihara et al (2009) reported the requirements to calculate the partitioning ratio of carbon gained by photosynthesis to harvest shoots, roots, crowns, and mother stems etc. by feeding 13 CO 2 to bent shoots.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Harvest Shoot Stage on Partitioning of Photosynthates Originating from Bent Shoots in the Modified Arching Technique of Cut Rose Production

et al. 2020

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By using a stable isotope method, partitioning of photosynthates was examined in a modified arching (MA) technique that achieved a high cut flower productivity to clarify how photosynthates produced by bent shoots are distributed within a plant at different developmental stages of harvest shoots. The translocation ratios from bent shoots at four days after harvest, eight days after harvest, for 10 cm-shoots, flower budding, and blooming were 44.0, 40.2, 51.0, 38.3, and 23.4%, respectively, and plants at the blooming stage had lower translocation ratios compared to those at the other developmental stages. The distribution of photosynthates produced by the bent shoot parts varied with the plant stage of the harvest shoots. The partitioning ratios of roots and crowns at four days, eight days, for 10 cm-shoots, flower budding, and blooming were 63.9, 53.5, 17.5, 26.6, and 81.0%, respectively. From these results, it was revealed that in the period from blooming to the next sprouting, roots and crowns were strong sinks. The partitioning ratios of mother stems were 36.2, 46.4, 7.2, 15.0, and 8.2%, respectively. We estimate that the mother stems are a strong sink right after harvest and absorb the photosynthates for the new sprouting. At the 10 cm-shoot and flower budding stages, photosynthates were partitioned to harvest shoots at 75.2% and 58.4%, respectively, indicating that they were distributed preferentially to vigorously growing harvest shoots. A total of 11.4% of the photosynthates were partitioned to harvest shoots at the blooming stage, suggesting that the photosynthates from the bent shoots were not involved directly in flower blooming. This study will contribute to improving the MA technique and cut rose production.

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Section: Discussioncontrasting

confidence: 63%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Harvest Shoot Stage on Partitioning of Photosynthates Originating from Bent Shoots in the Modified Arching Technique of Cut Rose Production

et al. 2020

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Optimizing bent branch numbers improves transpiration and crop water productivity of cut rose (Rosa hybrida) in greenhouse

Yin,

Chen,

et al. 2024

Agricultural Water Management

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Quantifying the contribution of bent shoots to plant photosynthesis and biomass production of flower shoots in rose (Rosa hybrida) using a functional–structural plant model

Zhang¹,

Westreenen²,

Evers³

et al. 2019

Annals of Botany

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Background and Aims The success of using bent shoots in cut-rose (Rosa hybrida) production to improve flower shoot quality has been attributed to bent shoots capturing more light and thus providing more assimilates for flower shoot growth. We aimed at quantifying this contribution of photosynthesis by bent shoots to flower shoot growth. Methods Rose plants were grown with four upright flower shoots and with no, one or three bent shoots per plant. Plant architectural traits, leaf photosynthetic parameters and organ dry weight were measured. A functional–structural plant (FSP) model of rose was used to calculate photosynthesis of upright shoots and bent shoots separately, taking into account the heterogeneous canopy structure of these plants. Key Results Bent shoots contributed to 43–53 % of total assimilated CO2 by the plant. Plant photosynthesis increased by 73 and 117 % in plants with, respectively, one and three bent shoots compared with plants without bent shoots. Upright shoot photosynthesis was not significantly affected by the presence of bent shoots. However, upright shoot dry weight increased by 35 and 59 % in plants with, respectively, one and three bent shoots compared with plants without bent shoots. The increased upright shoot dry weight was entirely due to the contribution of extra photosynthesis by bent shoots, as this was the only source that could induce differences in upright shoot growth apart from their own photosynthesis. At least 47–51 % of the photosynthesis by bent shoots was translocated to upright shoots to support their biomass increase. Conclusions Based on model simulations, we conclude that the positive effect of shoot bending on flower shoot growth and quality in cut-rose production system can almost entirely be attributed to assimilate supply from bent shoots. FSP modelling is a useful tool to quantify the contributions of photosynthesis by different parts of heterogeneous canopies.

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Partitioning of photosynthates originating from bent shoots in the arching and high-rack culture systems of cut rose production

Cited by 6 publications

References 16 publications

Effects of Harvest Shoot Stage on Partitioning of Photosynthates Originating from Bent Shoots in the Modified Arching Technique of Cut Rose Production

Effects of Harvest Shoot Stage on Partitioning of Photosynthates Originating from Bent Shoots in the Modified Arching Technique of Cut Rose Production

Optimizing bent branch numbers improves transpiration and crop water productivity of cut rose (Rosa hybrida) in greenhouse

Quantifying the contribution of bent shoots to plant photosynthesis and biomass production of flower shoots in rose (Rosa hybrida) using a functional–structural plant model

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