水分胁迫对不同抗旱性甘薯膜脂过氧化和非酶促保护物质的影响

Effects of Water Stress on Membrance Lipid Peroxidation and Non-enzymatic Protection System in Sweet Potato of Different Drought Resistance

进行了水分胁迫对不同抗旱性甘薯品种膜脂过氧化和非酶促保护物质影响的研究。结果表明:在水分胁迫条件下,潮薯1号(耐旱)、胜利百号(不耐旱)2个供试品种的抗坏血酸(ASA)、丙二醛(MDA)、电导率、超氧阴离子自由基(O2)和过氧化氢(H2O2)含量均有不同程度的增加,而类胡萝卜素(CAR)有不同程度的下降,还原型谷胱甘肽(GSH)含量先下降后上升;2个品种变化趋势一致,但变化幅度却因品种而异。还探讨了甘薯膜脂过氧化及非酶促保护物质与甘薯品种耐旱特性的关系。

Under different water stress conditions,electrolytic conductivity, malonadehyde (MDA),superoxide anion radical (O2 ) and hydrogen peroxide (H2O2) increased in the two sweet potato varieties,Chaoshu 1 (drought tolerant) and Okinawa 100 (drought sensitive).The contents of carotenoids (CAR),glutathione (GSH) increased after slightly decreased,and the content of ascorbic acid (ASA) decreased after slightly increased.The variation degrees were different in the two varieties. The relationship between membrane lipid peroxidation, non-enzymatic protection system and drought tolerance of sweet potato varieties was discussed.