Investigations of Carbon Transport in Plants

Moorby, J.; Troughton, John H.; Currie, B. G.

doi:10.1093/jxb/25.5.937

Cited by 39 publications

(3 citation statements)

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“…The rates of movement of 11 C through the maize sut1 mutant plants that we measured were much too fast, 0.75 -1 m/hr, to be explained by diffusion, but instead are indicative of an energy-dependent process driving the moderately fast laminar flow of phloem sap. Further, the sap flow velocities in maize sut1 mutants are within the range of WT sap flow velocities previously measured in non-mutant plants of other crop species and trees (Table S2) 36,38,39,[56][57][58][59][60][61][62] .…”

Section: Discussionsupporting

confidence: 67%

Sugar loading is not required for phloem sap flow in maize plants

et al. 2022

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Section: Discussionsupporting

confidence: 67%

Sugar loading is not required for phloem sap flow in maize plants

et al. 2022

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“…Using both TACs, the velocity of photoassimilate translocation through the peduncle of the eggplant was estimated to be approximately 1.17 cm·min −1 . Moorby et al (1974) estimated the velocity of translocation through the petiole of tomato plants by using 11 CO 2 detected with a scintillation counter; their value was 0.95 to 1.13 cm·min −1 . Our estimated value was therefore almost identical.…”

Section: Resultsmentioning

confidence: 99%

“…5700 years), and 13 C is stable, both of these methods are suitable for experiments in which there are long periods of observation, but they are invasive and require the breakdown or extraction of plant tissues. Troughton et al (1974) and Moorby et al (1974) established a basic system to observe carbon transport in intact plants by using 11 C as another radioactive nuclide. Radioactive 11 C, generally produced by a cyclotron, decays quickly and emits positrons, which are bombarded with electrons to produce high-energy annihilation γ-rays that can easily penetrate intact tissues.…”

Section: Introductionmentioning

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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Carbohydrate Partitioning and Metabolism in Crops

Daie

1985

Horticultural Reviews

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Investigations of Carbon Transport in Plants

Cited by 39 publications

References 0 publications

Sugar loading is not required for phloem sap flow in maize plants

Sugar loading is not required for phloem sap flow in maize plants

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

Carbohydrate Partitioning and Metabolism in Crops

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