Infuence of Salinity and Temperature on the Germination of Pugionium dolabratum Maxim.

doi:10.7668/hbnxb.2010.02.035

Abstract

Abstract: This paper studied the seed germination of Pugionium dolabratum Maxim.from Tengger desert in Inner Mongolia Autonomous under different temperature and NaCl concentration,to explore its seed germination of salt tolerance and germination mechanism of sand saline environments.Planting so as desert and grassland of salinization to be restored and improved,as well as the introduction and cultivation of salt-tolerant plants to provide theoretical reference.Results showed that seed germination tolerance NaCl limit concentration was 150 mmol/L.The optimal germination temperature for P.dolabratum was 25℃ in NaCl.Capacity for germination recovery was well by 200 mmol/L NaCl solution pre-treatment after ungerminated seeds transferred to distilled water.Further,adequate NaCl solution pre-treatment did not only no inhibit germination,but also increased germination,recovery germination rate and germination uniformity.This paper discussed P.dolabratum seed germination characteristics and adaptive strategy of this species that allows it to inhabit harsh saline conditions such as those in the deserts.

Key words: Pugionium dolabratum Maxim, Temperature, Salinity, Salt tolerance, Psammophyte

CLC Number:

Q949.748.3

SONG Zhao-wei, HAO Li-zhen, WEN Jing, LI Na, LI Hong-yan. Infuence of Salinity and Temperature on the Germination of Pugionium dolabratum Maxim.[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(2): 172-177. doi: 10.7668/hbnxb.2010.02.035.

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