Changes in cellular permeability of different coats of Allium cepa L after X-ray irradiation

Srb, V

doi:10.1016/0014-4827(63)90381-1

Cited by 7 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many forms of irradiation appear to change the permeability of cells. Irradiations at high doses enhance cell permeability considerably (Portela et al 1963, Skou 1963, Srb and Hluchovsky 1963, van der Schueren and Phjisiol. Plant., 20,1967 Ronte 1958, Weijer 1963).…”

Section: Discussionmentioning

confidence: 99%

“…There is no doubt that nucleic acids and normal metabolic processes are increasingly inactivated as the dose increases. Considering the mode of injnries to the cell wall and membrane induced by irradiation (Heilbrunn and Mazia 1936, Portela et al 1963, Srb and Hluchovsky 1963, Weijer 1963, one can assume that the protective action of Ca against the death of pollen by irradiation (Table 2) occurred through a decrease in cell permeability and increased rigidity of the cell wall or membrane, due to an increased amount of available Ca surrounding the cell.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Calcium Ion and the Protective Action on Survival and Growth Inhihition of Pollen

Kwack¹,

Kim²

1967

Physiologia Plantarum

View full text Add to dashboard Cite

Studies were condvicled on the protective action of Ca against growth inhibition and death of pollen from Crinum auaticum and Catharanthus TOSCUS. Ca ions not only promoted pollen germination and pollen tube growth, but also were antagonistic to pollen injuries induced by various chemical and physical treatments. Most of the chemicals used seemed to act as osmotic inhibitors, .f^mong the chemical agents tested, DNP inhibited pollen germination more strikingly with Ca than without it, whereas pollen tube growth was enhanced, .\nother metabolic inhibitor, low temperature, showed a similar effect on pollen germination. Insignificant or no protective action of Ca was observed when IAA, TIBA and coumarin, were applied.Large populations of pollen when grown in cultural media witbout Ca showed a partial protective action.The protective action of Ca in pollen growth against various inhibitors required other cations such as Mg and K ions. The promoting of pollen growth by Ca also required tbese otber cations.Tbe protective action of Ca is considered to be based on its binding in tbe pollen cell walls, particularly in the pectic regions. This gives rise to a decreased permeability and increased structural rigidity against tbe chemical and physical inhibitors.

show abstract