高温胁迫对5种牧草生理生化特性的影响

Effects of high temperature stress on physiologicaland biochemical characteristicsof five forages

摘要:

利用生化培养箱模拟了高温胁迫(38℃/30℃)对高羊茅(Festuca elata)、鸭茅(Dactylis glomerata)、一年生黑麦草(Lolium multiflorum)、宽叶雀稗(Paspalum wetsfeteini)和百喜草(Paspalum notatum)等5种牧草生理生化特性的影响。结果表明:高温胁迫下,5种牧草的超氧化物歧化酶(SOD)、过氧化物酶(POD)活性、可溶性蛋白含量(SP)和谷胱甘肽含量(GSH)均呈现先上升后下降的趋势,丙二醛含量(MDA)持续上升,叶绿素含量(SPAD)呈现明显下降趋势。百喜草和宽叶雀稗对高温胁迫适应能力明显强于一年生黑麦草、鸭茅和高羊茅。

Abstract:

This study was conducted to examine the effects of physiological and biochemical characteristics of five forages under high temperature stress (38℃/30℃).The relative enzyme activity,malondialdehyde content,chlorophyll content and other physiological indexes were determined under high temperature stress.The results showed that under high temperature stress,the activities of superoxide dismutase (SOD) and peroxidase (POD),the content of soluble protein (SP) and glutathione (GSH) of five forage species showed a trend of first rising and then declining,while the content of malondialdehyde (MDA) continued to rise,the content of chlorophyll (SPAD) showed a significant decline.The adaptability of Paspalum notatum Flugge and Paspalum wetsfeteini to high temperature stress was significantly better than that of Festuca elata,Lolium multiflorum and Dactylis glomerata.