Carbon balance of a whole tomato plant and the contribution of source leaves to sink growth using the CO<sub>2</sub> steady‐state feeding method

Shishido, Yoshihiro; Kumakura, Hiroshi; Nishizawa, Takashi

doi:10.1034/j.1399-3054.1999.106407.x

Cited by 16 publications

(12 citation statements)

References 24 publications

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“…Shishido et al (1988Shishido et al ( , 1999 reported in tomato that leaf position determines which source leaf will contribute to the growth of each particular sink. They suggested that phyllotaxis and the arrangement of the vascular system were related to the distribution of photoassimilates.…”

Section: Resultsmentioning

confidence: 99%

Real-time Analysis of Photoassimilate Translocation in Intact Eggplant Fruit using 11CO2 and a Positron-emitting Tracer Imaging System

Kikuchi

Ishii

Fujimaki

et al. 2008

J. Japan. Soc. Hort. Sci.

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A recently developed positron-emitting tracer imaging system (PETIS) noninvasively produces quantitative realtime images of the movement of various compounds in plants. To clarify the mechanism of the growth and development of the fruit of eggplant (Solanum melongena L.), we fed 11 CO 2 to a leaf and monitored the translocation of 11 C-labeled photoassimilate into the fruit by PETIS. Continuous images of the translocation of [11 C]photoassimilate from the leaf to the fruit and inside the fruit were produced, with a shorter time resolution than reported previously. 11 C signal intensity in the fruit increased gradually, and its distribution was not uniform. The fruits were sliced after PETIS measurement and exposed to the imaging plates of a bio-imaging analyzer system. The resultant images showed the localization of 11 C activity inside the fruit, and indicated that translocation of photoassimilate within the fruit was not uniform. The velocity of photoassimilate translocation in the peduncle and changes in the rate of translocation of photoassimilate in the fruit were estimated by analysis of PETIS data. The velocity of photoassimilate translocation through the peduncle was estimated as 1.17 cm·min −1. About 60 min after the start of 11 CO 2 feeding, the 11 C activity of the fruit began to increase, and by 120 min it had reached about 8% of feeding 11 CO 2 . These results indicate that it took about 60 min for the first [11 C]photoassimilates to reach the fruit. Real time observation of photoassimilate translocation within a fruit has never been reported. PETIS may be a powerful tool for revealing the mechanisms of fruit development and maturity.

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Section: Resultsmentioning

confidence: 99%

Real-time Analysis of Photoassimilate Translocation in Intact Eggplant Fruit using 11CO2 and a Positron-emitting Tracer Imaging System

Kikuchi

Ishii

Fujimaki

et al. 2008

J. Japan. Soc. Hort. Sci.

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“…This effect could result from different allocation patterns of C fixed by well-lit and shaded leaves, and a difference between the two leaf categories in the d 13 C of photosynthate produced by them. In a 14 C-labelling study with tomato Shishido, Kumakura & Nishizawa (1999) observed that lower leaves allocated relatively more C to roots than upper leaves; whereas upper leaves allocated relatively more C to the shoot apex. Photosynthetic 13 C-discrimination in sun leaves is less than in shaded leaves, leading to more negative d 13 C of assimilate produced by shaded than by well-lit leaves (LeRoux et al 2001;Baldocchi & Bowling 2003).…”

Section: Contrasting Respiratory Fractionation In Shoots and Rootsmentioning

confidence: 98%

C‐isotope composition of CO₂ respired by shoots and roots: fractionation during dark respiration?

Klumpp

Schäufele

Lötscher

et al. 2004

Plant Cell & Environment

142

168

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The CO 2 respired by leaves is , where root and shoot substrate is defined as imported C, and plant substrate is total photosynthate. Estimates were obtained from C isotope balances of shoots, roots and whole plants of sunflower and alfalfa using growth and respiration data collected at intervals of 1 to 2 weeks. e plant and e Shoot differed significantly from zero. e plant ranged between ----0.4 and ----0.9‰, whereas e Shoot was much greater ( ----0.6 to ----1.9‰). e Root was not significantly different from zero. The present results help to resolve the apparent conflict between leafand ecosystem-level 13 C discrimination in respiration.

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“…The 13 C abundance of each organ was regarded as sink specifi c activity, and dry weight of sink was calculated as sink size. The RSS was calculated by dividing the sink strength of an individual organ by the sum of sink strengths of the whole spur, and the result expressed as a percentage of the total (Shishido et al, 1999;Treder and Kubik, 2000). STATISTICAL ANALYSIS.…”

Section: Characteristics Of Leaf Flower Fruit and Shoot Typementioning

confidence: 99%

Spur Characteristics, Fruit Growth, and Carbon Partitioning in Two Late-maturing Japanese Pear (Pyrus pyrifolia Nakai) Cultivars with Contrasting Fruit Size

Zhang¹,

Tanabe²,

Tamura³

et al. 2005

jashs

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The aim of this study was to investigate the roles of spur characteristics and carbon partitioning in regulating cultivar differences in fruit size of two late-maturing japanese pear cultivars, `Atago' and `Shinkou'. The study of spur characteristics showed that the two cultivars displayed different patterns in leaf development, flower characteristics, fruit growth, and shoot type. In contrast to `Atago' with dramatically larger fruit, `Shinkou' is a heavily spurred cultivar with a higher total leaf area and leaf number per spur early in fruit growth, less vegetative shoots, and smaller fruit but larger core. No significant differences were obtained in specific leaf weight, leaf thickness, chlorophyll content, and net photosynthesis of mature leaves, and seed number per fruit between the two cultivars. The results of trace experiment with 13C revealed that on a spur basis, there were no significant differences in the amount of 13C assimilate produced by spur leaves on each labeling date except at 190 days after anthesis, however, there were highly significant differences in the amount of 13C allocated to fruit between cultivars. Moreover, a higher amount of 13C assimilates was allocated to `Atago' flesh (or fruit) than that in `Shinkou'. Analysis of relative sink strength (RSS) indicates that the sink strength of fruit was dominant over those of other organs in the spur measured in both cultivars except at the early stage of fruit growth. `Atago' exhibited a greater RSS of fruit and lower losses of 13C for respiration and export than `Shinkou'. These results suggest that the movement of photosynthates into the fruit was determined by sink strength of the fruit rather than the source strength in the two cultivars.

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Carbon balance of a whole tomato plant and the contribution of source leaves to sink growth using the CO₂ steady‐state feeding method

Cited by 16 publications

References 24 publications

Real-time Analysis of Photoassimilate Translocation in Intact Eggplant Fruit using 11CO2 and a Positron-emitting Tracer Imaging System

Real-time Analysis of Photoassimilate Translocation in Intact Eggplant Fruit using 11CO2 and a Positron-emitting Tracer Imaging System

C‐isotope composition of CO₂ respired by shoots and roots: fractionation during dark respiration?

Spur Characteristics, Fruit Growth, and Carbon Partitioning in Two Late-maturing Japanese Pear (Pyrus pyrifolia Nakai) Cultivars with Contrasting Fruit Size

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Carbon balance of a whole tomato plant and the contribution of source leaves to sink growth using the CO2 steady‐state feeding method

Cited by 16 publications

References 24 publications

Real-time Analysis of Photoassimilate Translocation in Intact Eggplant Fruit using 11CO2 and a Positron-emitting Tracer Imaging System

Real-time Analysis of Photoassimilate Translocation in Intact Eggplant Fruit using 11CO2 and a Positron-emitting Tracer Imaging System

C‐isotope composition of CO2 respired by shoots and roots: fractionation during dark respiration?

Spur Characteristics, Fruit Growth, and Carbon Partitioning in Two Late-maturing Japanese Pear (Pyrus pyrifolia Nakai) Cultivars with Contrasting Fruit Size

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Carbon balance of a whole tomato plant and the contribution of source leaves to sink growth using the CO₂ steady‐state feeding method

C‐isotope composition of CO₂ respired by shoots and roots: fractionation during dark respiration?