EFFECT OF SALINITY ON ETIOPLAST AND ITS INNER MEMBRANES

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AMIRJANI M.R.

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Journal: IRANIAN JOURNAL OF BIOLOGY Year:2011 | Volume:24 | Issue:5 Page(s): 737-751

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Information Journal Paper

Title

EFFECT OF SALINITY ON ETIOPLAST AND ITS INNER MEMBRANES

Author(s)

AMIRJANI M.R. | Issue Writer Certificate

Keywords

WHEATQ2

SALINITYQ2

ETIOPLASTQ2

FLUORESCENCE EMISSION SPECTRUMQ2

PROTOCHLOROPHYLLIDEQ2

Abstract

Leaf sections from 8-d-old dark-grown WHEAT (Triticum aestivum L.) were exposed to high salt stress (600 mM). Using low-temperature fluorescence spectroscopy and transmission electron microscopy the native arrangements of plastid pigments as well as the ultrastructure of the plastids were studied. Plastids from salt-treated leaves had highly swollen prothylakoids but the prolamellar bodies were regular. A slight intensity decrease of the short-wavelength PROTOCHLOROPHYLLIDE (Pchlide) form fluorescing at 633 nm was observed. But the long-wavelength Pchlide form emitting at 656 nm showed no changes. The newly formed swollen thylakoids, after irradiation, has been showed traversing stromal strands. The PLB dispersal was partly inhibited and formed as an electron-dense structure, which remained after 8 h irradiation. The difference in fluorescence emission maximum of the main chlorophyll form in salt-stressed leaves (681 nm) and in control leaves (683 nm) indicated an arrested formation of the photosynthetic apparatus. Overall chlorophyll production was restricted during prolonged irradiation. Salt-stressed leaves returned to darkness after 3 h of irradiation had a reduced amount of Pchlide and reduced re-formation of regular net-like PLBs, compared to the control. Instead, the size of the electron-dense structures increased.This study reports the salt-induced swelling of PTs and reveals traversing stromal strands. Although the PLBs were intact and the Pchlide fluorescence emission spectra appeared normal after salt stress in darkness, plastid development to chloroplasts was highly restricted during irradiation.

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APA: Copy

AMIRJANI, M.R.. (2011). EFFECT OF SALINITY ON ETIOPLAST AND ITS INNER MEMBRANES. IRANIAN JOURNAL OF BIOLOGY, 24(5), 737-751. SID. https://sid.ir/paper/21303/en

Vancouver: Copy

AMIRJANI M.R.. EFFECT OF SALINITY ON ETIOPLAST AND ITS INNER MEMBRANES. IRANIAN JOURNAL OF BIOLOGY[Internet]. 2011;24(5):737-751. Available from: https://sid.ir/paper/21303/en

IEEE: Copy

M.R. AMIRJANI, “EFFECT OF SALINITY ON ETIOPLAST AND ITS INNER MEMBRANES,” IRANIAN JOURNAL OF BIOLOGY, vol. 24, no. 5, pp. 737–751, 2011, [Online]. Available: https://sid.ir/paper/21303/en

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