Biological Characteristics And Stress Tolerance Of Several Xerophyte

The test takes the Zygophyllum xanthoxylum Maxim. seeds, the Caraganakorshinskii Kom. seeds and the Nitraria sibirica Pall. seeds for the materials,studiesthe morphological characteristics and the effects of the temperature, soil, NaCl,seeding depth,illumination and PEG stress on the germination of the three seeds,andstudies the seedling resistance of the Zygophyllum xanthoxylum Maxim., theCaragana korshinskii Kom. and the Nitraria sibirica Pall.,and evaluates the themorphological and resistant characteristics of them,the results:1、The seed vitality of the Zygophyllum xanthoxylum seeds is the highest,the seedgermination:Caragana korshinskii Kom.>Nitraria sibirica Pall.>Zygophyllumxanthoxylum Maxim.;the adaption on the soil: Caragana korshinskii Kom.>Nitrariasibirica Pall.>Zygophyllum xanthoxylum Maxim.; the restrain of the germination isZygophyllum xanthoxylum Maxim.>Caragana korshinskii Kom.>Nitraria sibiricaPall.The most suitable seeding depth is0.5cm,and on this level,the germination isZygophyllum xanthoxylum Maxim.>Caragana korshinskii Kom.>Nitraria sibiricaPall..The response on the illumination of the three different seeds is different, Nitrariasibirica Pall.>Caragana korshinskii Kom.>Zygophyllum xanthoxylum Maxim..Underthe high NaCl concentration,the resistance on the salt stess of the three seeds isCaragana korshinskii Kom.>Nitraria sibirica Pall.>Zygophyllum xanthoxylumMaxim..The effect of the PEG stress on the three seeds is Zygophyllumxanthoxylum Maxim.>Caragana korshinskii Kom.>Nitraria sibirica Pall.2、Nitraria sibirica Pall. has the highest resistantce on the salt stress;the ability ofresisting the drought stress of the Zygophyllum xanthoxylum Maxim., Caraganakorshinskii Kom. and the Nitraria sibirica Pall. is high. The resistantce of theCaragana korshinskii Kom. on the hypothermia stress is the lowest.