Visual Indications of S 35 and P 32 Translocation in the Phloem

Biddulph, Susann

doi:10.2307/2438822

Cited by 45 publications

(21 citation statements)

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“…Phosphoryl choline was not detected with the above methods or with those of Maizel et al (15). 4. Autoradiograms of a filter paper chromatogram showing the P32 and C'4 radioactivity of substances present in the petiole 60 minutes after application of the tracers to a leaflet.…”

Section: Methodsmentioning

confidence: 79%

An Analysis of Translocation in the Phloem of the Bean Plant Using Tho, P³², And C¹⁴.

Biddulph

Cory

1957

Plant Physiol.

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Section: Methodsmentioning

confidence: 79%

An Analysis of Translocation in the Phloem of the Bean Plant Using Tho, P³², And C¹⁴.

Biddulph

Cory

1957

Plant Physiol.

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“…Application of 35 S-GSH was carried out using the flap-feeding technique of Biddulph (1956) as described by . For this purpose, a flap was cut into a leaf of the first or second flush under tap water in order to avoid embolisms in the vessels.…”

Section: S-gsh Applicationmentioning

confidence: 99%

Interactive effects of elevated atmospheric CO₂, mycorrhization and drought on long‐distance transport of reduced sulphur in young pedunculate oak trees (Quercus robur L.)

Schulte

Herschbach

Rennenberg

1998

Plant Cell & Environment

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Pedunculate oak (Quercus robur L.) was germinated and grown under nutrient non-limiting conditions for a total of 10-15 weeks at ambient CO 2 concentration and 1100 µmol mol -1 CO 2 either in the presence or the absence of the mycorrhizal fungus Laccaria laccata. Half of the oak trees of these treatments were exposed to drought during final growth by suspending the water supply for 21 d. Mycorrhization and elevated atmospheric CO 2 each enhanced total plant biomass per tree. Whereas additional biomass accumulation of trees grown under elevated CO 2 was mainly attributed to increased growth of lateral roots, mycorrhization promoted shoot growth. Water deficiency reduced biomass accumulation without affecting relative water content, but this effect was more pronounced in mycorrhizal as compared to non-mycorrhizal trees. Elevated CO 2 partially prevented the development of drought stress, as indicated by leaf water potential, but did not counteract the negative effects of water deficiency on growth during the time studied. Enhanced biomass accumulation requires adaption in protein synthesis and, as a consequence, enhanced allocation of reduced sulphur produced in the leaves to growing tissues. Therefore, allocation of reduced sulphur from oak leaves was studied by flapfeeding radiolabelled GSH, the main long-distance transport form of reduced sulphur, to mature oak leaves. Export of radiolabel proceeded almost exclusively in basipetal direction to the roots. The rate of export of radioactivity out of the fed leaves was significantly enhanced under elevated CO 2 , irrespective of mycorrhization. A higher proportion of the exported GSH was transported to the roots than to basipetal stem sections under elevated CO 2 as compared to ambient CO 2 . Mycorrhization did not affect 35 S export out of the fed leaves, but the distribution of radiolabel between stem and roots was altered in preference of the stem. Trees exposed to drought did not show appreciable export of the 35 S radioactivity fed to the leaves when grown under ambient CO 2 . Apparently, drought inhibited basipetal transport of reduced sulphur at the level of phloem loading and/or phloem transport. Elevated CO 2 seemed to counteract this effect of drought stress to some extent, since higher leaf water potentials and improved 35 S export out of the fed leaves was observed in oak trees exposed to drought and elevated CO 2 as compared to trees exposed to drought and ambient CO 2 .

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“…The methods employed are those of geographic tracing by means of radioactive sulfur. Data are presented on the following points: 1) the effect of nutrient sulfur content on dry matter yield and on sulfur concentration within organs; 2) the effect of pH on sulfur absorption; 3) the exchange of sulfur between various organs; 4) the rate of downward translocation of sulfur in stems.…”

mentioning

confidence: 99%

The Absorption and Translocation of Sulfur in Red Kidney Bean.

1956

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Visual Indications of S 35 and P 32 Translocation in the Phloem

Cited by 45 publications

References 0 publications

An Analysis of Translocation in the Phloem of the Bean Plant Using Tho, P³², And C¹⁴.

An Analysis of Translocation in the Phloem of the Bean Plant Using Tho, P³², And C¹⁴.

Interactive effects of elevated atmospheric CO₂, mycorrhization and drought on long‐distance transport of reduced sulphur in young pedunculate oak trees (Quercus robur L.)

The Absorption and Translocation of Sulfur in Red Kidney Bean.

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Visual Indications of S 35 and P 32 Translocation in the Phloem

Cited by 45 publications

References 0 publications

An Analysis of Translocation in the Phloem of the Bean Plant Using Tho, P32, And C14.

An Analysis of Translocation in the Phloem of the Bean Plant Using Tho, P32, And C14.

Interactive effects of elevated atmospheric CO2, mycorrhization and drought on long‐distance transport of reduced sulphur in young pedunculate oak trees (Quercus robur L.)

The Absorption and Translocation of Sulfur in Red Kidney Bean.

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An Analysis of Translocation in the Phloem of the Bean Plant Using Tho, P³², And C¹⁴.

An Analysis of Translocation in the Phloem of the Bean Plant Using Tho, P³², And C¹⁴.

Interactive effects of elevated atmospheric CO₂, mycorrhization and drought on long‐distance transport of reduced sulphur in young pedunculate oak trees (Quercus robur L.)