Effects of PEG-6000 Simulated Drought Stress on Antioxidant Enzyme Systems of Five Varieties of Gramineous Forage Grass Seedlings
In order to investigate the response of grass forage seedlings to drought stress and to screen out drought-tolerant materials,five grass forage varieties were selected as the research objects in this experiment,and PEG-6000 was used to simulate drought stress on grass forage seedlings,.and the drought tolerance of the five grass forage varieties was comprehensively evaluated by affiliation function method through analyzing the morphology of the seedlings and the changes in the activities of antioxidant enzyme systems.It was found that under drought stress,the plant phenotypes and physiological characteristics of the five grass forage species were affected to different degrees.The adaptive mechanism of different grass forage spe-cies to drought stress was regulated by multiple indicators,and the order of drought resistance of the five grass forage species analyzed by using the af-filiation function was as follows:Triticum aestivum-Gaofeng＞Avena sativa-Youmu Number 1＞Triticale-Xinmai Generation 1＞Avena sativa-Maiduo＞Avena sativa-Monika.The results showed that the forage variety Triticum aestivum-Gaofeng could maintain high growth capacity under drought stress to sustain its growth and development in adversity,in addition,it could increase the activity of antioxidant enzymes in the body,and improve the resistance of the forage to adversity by eliminating reactive oxygen species.In summary,the forage grass variety Triticum aestivum-Gaofeng showed stronger drought resistance,which can provide a material basis for cultivating drought-resistant forage grass varieties,as well as a basis for artificial grassland establishment,improvement of grassland productivity and ecological restoration.
drought stressgramineous forage grassseedlingantioxidant enzyme systems
万方数据
维普
