Inhibition of net synthesis of ribonuclease by polyamines in potato tuber slices

Isola, María Clara; Franzoni, Luis

doi:10.1016/0168-9452(89)90099-x

Cited by 12 publications

(5 citation statements)

References 16 publications

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“…The same is true for the data described above but increased turnover must be considered a possibility as an increase in ribonuclease activity has been previously observed in wounded potato tuber (Isola and Franzoni, 1981;McLaughlin and Knowler, unpublished observations).…”

Section: Changes In Phosphorylase and Patatin Mrna Levels In Sproutinsupporting

confidence: 59%

Tissue distribution and change in potato starch phosphorylase mRNA levels in wounded tissue and sprouting tubers

Bhatt¹,

Knowler²

1992

European Journal of Biochemistry

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Starch phosphorylase has been cloned from a λgt10 cDNA library of potato tuber mRNA. Selected recombinants have been used to demonstrate that phosphorylase mRNA is most abundant in tubers but is also detectable in stolon, root, stem and leaf tissue. The level of phosphorylase mRNA was greatly reduced in wounded stem and tuber tissue. The wounding‐induced decrease in phosphorylase mRNA levels is not reversed in the presence of sucrose or mannitol. Regional differences are described in the levels of phosphorylase and patatin mRNA in different parts of the tuber and in the shoot of sprouting potatoes.

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Section: Changes In Phosphorylase and Patatin Mrna Levels In Sproutinsupporting

confidence: 59%

Tissue distribution and change in potato starch phosphorylase mRNA levels in wounded tissue and sprouting tubers

Bhatt¹,

Knowler²

1992

European Journal of Biochemistry

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“…Polyamines effectively limit solute leakage and increase ribonuclease activity in potato (Altman 1982. Isola andFranzoni 1989). Sejin and Seung Koo (1996) proposed antisenescence activity of putrescine which can be attributed to its ability to stabilize and protect membranes in tomato.…”

Section: Introductionmentioning

confidence: 99%

Polyamines as Modulators of Soybean Productivity

Sharma¹,

Ali²

1998

J Agronomy Crop Science

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Polyamines have been shown to be involved in several aspects of plant growth and development. In soybean, increase in number of pods per plant, 100 seed weigbt, seed, biological and oil yield was highest with spray of spermine and lowest (but significantly higher than control) with putrescine. The soybean seed and oil yield increased by about 12.46 and 20.94% respectively with application of 10"' M spermine at 50% flowering stage. Another spray of poiyamines at pod initiation stage had little effect on different parameters.

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“…Exogenous polyamine.s retard leaf senescence and inhibit the increase in protease and dbonuclease activities during leaf senescence (Altman 1982a, Kaur-Sawhney et al 1982, Shih et al 1982, Cheng and Kao 1983. Polyamines also inhibit rihonuclease activity in wounding or aging potato tuber discs (Altman 1982b, Isola andFranzoni 1989) and aamylase .activity in cotyledons of mung bean seedlings (Koizuka et al 1991).…”

Section: Introductionmentioning

confidence: 99%

The induction of α‐amylase activity by sucrose starvation in suspension‐cultured rice cells is regulated by polyamines

Sung

Liu

Kao

1994

Physiologia Plantarum

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The induction of a-amylase activily by sucrose starvation in suspension-cultured rice cells is regulated by polvamines. -Physiol. Plant. 91: 137-140.When suspension-cultured rice [Oryza sativa L. cv. Tainan 5) cells were deprived of sucrose, a-amylase (EC 3.2.1.1) activity in the cells and the culture medium increased markedly. The increase in activity of a-amy!ase caused by sucrose staivation in the cells and the medium was strongly reduced in the presence of exogenously added speniiine. Putrescine and spermidine also inhibited, thotigh only slightly, the increase in a-amylase activity caused by sucrose starvation. Preincubation of the enzyme extract or enzyme in the medium with polyamines had no effect on a-amylase activity. Sucrose starvation resulted in lower polyamine levels in rice suspension cells, D-Arginine and a-methylomithine, inhibitors of polyamine biosynthesis, caused reduced levels of poiyamines and increased activity of a-amyiase in rice suspension cells cultured in the presence of sucrose. Our results indicate that the induction of a-amylase activity by sucrose starvation in rice suspension cells is mediated, at least partly, through tbe intemal level of polyamines.

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Inhibition of net synthesis of ribonuclease by polyamines in potato tuber slices

Cited by 12 publications

References 16 publications

Tissue distribution and change in potato starch phosphorylase mRNA levels in wounded tissue and sprouting tubers

Tissue distribution and change in potato starch phosphorylase mRNA levels in wounded tissue and sprouting tubers

Polyamines as Modulators of Soybean Productivity

The induction of α‐amylase activity by sucrose starvation in suspension‐cultured rice cells is regulated by polyamines

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