The Development of the Enzyme Complement in Growing Root Cells

Robinson, E. A.; Brown, Rex V.

doi:10.1093/jxb/3.3.356

Cited by 78 publications

(32 citation statements)

References 7 publications

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“…There have been several reports of high invertase activities in rapidly growing plant tissues (12,14,17). XVe find an approximately linear relationship between the rate of elongation of immature internodes, and the invertase content per gram fresh weight of tissue (10).…”

Section: Introductionmentioning

confidence: 99%

Sugar Accumulation Cycle in Sugar Cane. III. Physical & Metabolic Aspects of Cycle in Immature Storage Tissues

1963

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PLANT PHYSIOLOGY rate of elongation of immnnature internodes were linearly related, both increasing with increasing temperature provided the plant had adequate water. Changes in the total sugar content of mature tissue were related to the neutral invertase activity of the tissue. The neutral invertase activity and sugar content of mature internodes increased as the temperature was decreased. The results are dliscussed in relation to the concept that invertases of sugar cane storage tissue contribute to the partitioning of available carbohydrate from photosynthesis between the processes of sugar storage and growth.

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Section: Introductionmentioning

confidence: 99%

Sugar Accumulation Cycle in Sugar Cane. III. Physical & Metabolic Aspects of Cycle in Immature Storage Tissues

1963

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“…Invertase can be envisaged to control cell growth by regulating the hydrolysis of sucrose an,d also its transport to cells as well as between different compartments of the cell. It is known to have its maximal activity in the most rapidly elongating part of growing roots (9,15) and stems (6), and the activity has been found to increase when the growth of the tissue was promoted by applied gibberellin (8,10,16).…”

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confidence: 99%

Invertase Activity and Cell Growth in Lentil Epicotyls

Seitz

Lang

1968

Plant Physiol.

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Abstract. The activity of invertase and its relation to growth were studied in the epicotyls of lentil seedling,s incubated in the presence and absence of gibberelflic acid (GA).Invertase activity per epicotyl increases relatively more rapidly than does length, reaches a maximum during most active elongation, and declines upon cessation of growth.GA3 enhanoes both growth and increase in invertase activity, without altering the kinetics of the 2 processes. If GA3 is added during incubation invertase activity increases more rapidly than does elongation rate.Incubation of the seedlings in solutions of polyethyleneglycol inhibits the increase of both growtih and invertese sotivity, the latter actually undergoin.g a decline, but coauses no great change in the relative effect of GA3* In presence of polyethyleneglycol GA3 has however a relatively greater effect on invertase activity than on growth.Sugars in the incubation medium have no significant effect on growth and invertase activity in the epicotyl, except inhilbition at relatively high concentrations.Cycloheximide, actinomycin D, and 5-fluorodeoxyuridine (FUDR) inhibit both growth and the increase in invertase activity. Added during incubation cycloheximide oauses oomplete inhibition of growth and a decrease in invertase activity with no appreciable lag phase. With actinomycin D and FUDR the inhibition oocurs after lag periods of 2 to 3 and of at least 10 hours, respectively. Thus the increase in enzyme activity is very probably based on de-novo synthesis, and the enzyme is in a state of turnover during growth.The enzyme is present in soluble form in the cytoplasm, not firmly bound to any cell structures.

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“…However, auxin did not affect the amount of C14-amino acid incorporated into protein of the coleoptile tissue during 6 hours. Changes in specific activities and amounts of certain enzymes occur in association with cell elongation (3,7,14,27,28).…”

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confidence: 99%