ZHANG Yujun,ZHAO Lili,CHEN Chao,et al.Physiological Response of Oat Seedlings to PEG Stress at Germination Stage[J].Northern Horticulture,2017,41(21):24-30.[doi:10.11937/bfyy.20171463]
燕麦萌发期幼苗对PEG胁迫的生理响应
- Title:
- Physiological Response of Oat Seedlings to PEG Stress at Germination Stage
- Keywords:
- oat; drought stress; physiological index; GGE-biplot
- 文献标志码:
- A
- 摘要:
- 以6个燕麦品种为试材,设置不同的PEG胁迫强度,研究各燕麦品种主要生理指标的变化情况,以探究不同燕麦品种萌发期幼苗对PEG胁迫的生理适应机制。结果表明:不同燕麦品种幼苗的丙二醛含量随PEG胁迫强度的加重而不断累积,细胞膜损伤逐渐加重;抗氧化酶活性以及可溶性蛋白质(SP)含量在低浓度胁迫时逐渐增大,维持细胞内的渗透势,保护细胞膜免遭伤害,高浓度胁迫时表现为抑制作用,生理系统破坏严重;结合GGE双标图,发现不同燕麦品种适应PEG胁迫的作用生理指标不同:“甘早燕麦”通过SOD调节;“奥塔燕麦”和“青海444燕麦”由SP和MDA调节适应;“甜燕1号燕麦”通过POD、CAT调节;-0.4 MPa渗透胁迫环境具有较好的区分力和代表性,可作为燕麦生产的最佳胁迫强度和优良燕麦品种筛选的浓度。
- Abstract:
- In order to investigate the physiological and biochemical effects of different drought stress on Oat seedlings.To explore the mechanism of physiological response of oat seedlings to PEG stress at germination-stage,six oat varieties (Anena sativa L.) were subjected to different drought stress simulated by PEG.The results showed that the MDA content of seedlings of different oat varieties with PEG stress intensity increased the accumulation of cell membrane damage gradually increased;antioxidant enzyme activity and soluble protein content increased at low concentration stress,maintain the osmotic potential of cells,protect the cell membrane from injury,high stress concentration showed inhibitory effect and physiological serious destruction;combined with GGE-biplot,found that different oat varieties to adapt to the role of PEG-6000 stress physiological indicators are different:‘Sweet early oat’ was regulated by SOD;‘Ota oat’ and ‘Qinghai 444 oat’ were regulated by SP and MDA;‘Sweet Yan No.1’ was regulated by POD,CAT.The osmotic stress environment of -0.4 MPa had good regional component and representativeness,which could be used as the best stress intensity of oat production and the concentration of excellent oat varieties.
参考文献/References:
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备注/Memo
第一作者简介:张宇君(1992-),女,硕士研究生,研究方向为牧草种质资源研究及育种。E-mail:zhangyj_92@163.com.