期刊
JOURNAL OF PLANT PHYSIOLOGY
卷 160, 期 5, 页码 573-575出版社
URBAN & FISCHER VERLAG
DOI: 10.1078/0176-1617-00948
关键词
chloroplast envelope; NaCl; Oryza sativa L.; PEG; thylakoids; ultrastructure
Ionic and osmotic effects of salinity on the ultrastructure of chloroplasts in salt-treated rice seedlings were investigated. After rice seedlings were grown in hydroponic culture for three weeks, they were treated with NaCl and polyethylene glycol (PEG) 4000 both at a water potential of -1.0 MPa for 3 days. The most notable difference in ultrastructural change between NaCl and PEG treatment was observed in the damage in chloroplast membranes. NaCl induced swelling of thylakoids and caused only a slight destruction of the chloroplast envelope. PEG caused severe destruction of the chloroplast envelope compared with NaCl, however thylakoids did not swell. Our observations suggested that in salt-treated rice plants, the ionic effects induced swelling of thylakoids and the osmotic effects caused the destruction of chloroplast envelope.
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