Salt- sensitive buckwheat variety TQ-0808 was treated as experimental material.Under NaCl stress of 100 mmol /L and adding different concentrations of mannitol and sorbitol treatment to study the effects of exogenous polyols on seeds germination and seedlings physiological traits of buckwheat.The results showed that the appropriate concentrations of exogenous mannitol and sorbitol treatment could significantly increase the germination rate(Gr), germination index(Gi) and vigor index(Vi) of buckwheat seeds,and significantly promote the seedlings growth and increase the nitrate reductase(NR) activity,superoxide dismutase(SOD) activity and ascorbate peroxidase(APX) ac- tivity of buckwheat seedlings under salt stress,which could also significantly decrease the plasmalemma permeability of buckwheat seedlings under salt stress,and significantly increase the chlorophyll content and net photosynthetic rate of buckwheat seedlings.It indicated that the appropriate concentrations of mannitol or sorbitol treatment could significantly improve seeds germination and seedlings growth of buckwheat,and significantly improve the physiologi- cal traits of buckwheat seedlings.The optimal concentrations of exogenous mannitol and sorbitol treatment were 0.8, 0. 6 mmol /L respectively,and the effects of exogenous mannitol treatment were better than those of sorbitol did.
YANG Hong-bing
. Effects of Exogenous Polyols on Seeds Germination and Seedlings Physiological Traits of Buckwheat under Salt Stress[J]. Acta Agriculturae Boreali-Sinica, 2013
, 28(4)
: 98
-104
.
DOI: 10.3969/j.issn.1000-7091.2013.04.019
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