Regulators of cell division in plant tissues. XXX. Cytokinin metabolism in relation to radish cotyledon expansion and senescence

1985 ◽  
Vol 4 (1-4) ◽  
pp. 129-145 ◽  
Author(s):  
D. S. Letham ◽  
B. I. Gollnow
Keyword(s):  
Cell Division ◽  
Plant Tissues ◽  
Cytokinin Metabolism ◽  
Radish Cotyledon ◽  
Cotyledon Expansion

Regulators of cell division in plant tissues

Planta ◽  
1979 ◽  
Vol 146 (1) ◽  
pp. 71-74 ◽  
Author(s):  
D. S. Letham ◽  
R. E. Summons ◽  
C. W. Parker ◽  
J. K. MacLeod
Keyword(s):  
Cell Division ◽  
Plant Tissues

Regulators of cell division in plant tissues—III

Tetrahedron ◽  
1967 ◽  
Vol 23 (1) ◽  
pp. 479-486 ◽  
Author(s):  
D.S. Letham ◽  
J.S. Shannon ◽  
I.R.C. McDonald
Keyword(s):  
Cell Division ◽  
Plant Tissues

Regulators of cell division in plant tissues

Planta ◽  
1967 ◽  
Vol 74 (3) ◽  
pp. 228-242 ◽  
Author(s):  
D. S. Letham
Keyword(s):  
Cell Division ◽  
Plant Tissues

Regulators of cell division in plant tissues

Planta ◽  
1974 ◽  
Vol 115 (4) ◽  
pp. 337-344 ◽  
Author(s):  
C. W. Parker ◽  
D. S. Letham
Keyword(s):  
Cell Division ◽  
Plant Tissues

scholarly journals Reduction in the level of intracellular myo-inositol in cultured soybean (Glycine max) cells inhibits cell division

1990 ◽  
Vol 265 (3) ◽  
pp. 809-814 ◽  
Author(s):  
M Biffen ◽  
D E Hanke
Keyword(s):  
Glycine Max ◽  
Cell Division ◽  
Suspension Culture ◽  
Callus Tissue ◽  
Plant Tissues ◽  
Intracellular Level ◽  
Soybean Callus ◽  
Inositol 1 ◽  
Division Cell ◽  
Important Enzyme

Although myo-inositol is included in media for the successful growth of plant tissues, the actual requirement of most tissues, including soybean (Glycine max) callus in suspension culture, for myo-inositol has not been demonstrated. We have made use of deoxyglucose to reduce intracellular levels of myo-inositol. Deoxyglucose is phosphorylated to deoxyglucose 6-phosphate, which inhibits L-myo-inositol 1-phosphate synthase, an important enzyme in the synthesis of myo-inositol. Addition of deoxyglucose to the medium resulted in a decrease in the intracellular level of myo-inositol that corresponded with a decrease in cell division. Cell viability was not affected. When myo-inositol was added to cells along with deoxyglucose, cell division was restored, as were intracellular levels of myo-inositol. Addition of myo-inositol had no affect on the uptake or metabolism of deoxyglucose. From these results we propose that myo-inositol has a role in maintaining cell division in soybean callus tissue in suspension culture.

Function of sterols

1978 ◽  
Vol 284 (1002) ◽  
pp. 541-558 ◽  
Keyword(s):  
Cell Division ◽  
Environmental Factors ◽  
Sterol Synthesis ◽  
Plant Tissues ◽  
Sterol Metabolism ◽  
Sterol Transport ◽  
Dehydrogenase Enzyme

In plants, neither sterol synthesis nor sterol balance is static. While all plant tissues have the ability to synthesize sterols, generally the younger tissue has a higher rate of synthesis. Additionally, the synthesis of the various individual sterols changes with tissue age and environmental factors. For example, the plant apex has a higher level of sitosterol than stigmasterol and as the tissue becomes older the ratio of sitosterol changes in favour of stigmasterol. The level of campesterol is also quite high in the plant apex, especially in the region of cell division. The change in sterols of the various tissues is apparently not due to intercellular sterol transport. With regard to light, both its intensity and photoperiod are important factors in controlling sterol synthesis, especially the sitosterol to stigmasterol balance. The change in sterol metabolism induced by light does not appear to be due to activation of the 22,23-dehydrogenase enzyme. The change in sterols and their possible relation to the development and physiology of the plant are discussed.

Regulators of cell division in plant tissues. XVI

Planta ◽  
1973 ◽  
Vol 114 (3) ◽  
pp. 199-218 ◽  
Author(s):  
C. W. Parker ◽  
D. S. Letham
Keyword(s):  
Cell Division ◽  
Plant Tissues

Regulators of cell division in plant tissues

Planta ◽  
1980 ◽  
Vol 147 (5) ◽  
pp. 422-434 ◽  
Author(s):  
R. E. Summons ◽  
B. Entsch ◽  
D. S. Letham ◽  
B. I. Gollnow ◽  
J. K. MacLeod
Keyword(s):  
Cell Division ◽  
Plant Tissues
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