EFFECT OF IMBIBITION UNDER SALT STRESS ON MERISTEMATIC CELL ULTRASTRUCTURE IN ROOT TIPS OF BARLEY
Yan Xianxi,ZhaoTanfang and Hu Yanji(Shandong Agricultural University,Taian 271018)
The barley(Hordeum vulgare L.)seeds were germinated in the normal conditions after 12hours imbibition under salt stress. The results showed that(1)The germination energy was verylow while the germination percentage was as high as that of control seeds;(2)The restoration ofmembrane system was perfect;(3)Plenty of endoplaqmic reticulum and Golgi body appeared;and(4)There were also increases in the quantities of amoeboid plastids and amoeboid mitochondriawhich were so called because of its same shape to amoeboid plastids. The facts suggested that theinhibitory effect of short- term salt stress on plants was reversible and it enhanced the metabolicactivities in cells as soon as the salt stress was removde,which was interpreted as a compensation’for the inhibitory effect. It was supposed that the amoeboid may be an adaption form of plastids or mitochondria to anenhanced metabolic activity since plenty of amoeboid plastids and amoeboid mitochondria ap-peared when the metablic activity increased in cells.