南方农业学报2012，Vol.43Issue(9)：1281-1286,6.DOI:10.3969/j:issn.2095-1191.2012.09.1281
土壤自然干旱胁迫对甘蔗幼苗根系保护酶系统的影响
Impact of natural soil drought stress on protective enzyme system in root system of sugarcane seedlings
摘要
Abstract
[Objective]The present experiment was conducted to study the effects of natural drought stress on protective enzyme system and related indicators in order to explore the mechanism of sugarcane seedling roots responding to drought stress. [Method]Using ROC 22 as test material, protective enzyme system and plasmalemma peroxidates related indexes of root system were detected under natural drought stress at the sugarcane seedling stage, and their correlations were analyzed. [Result]With the intensification of drought stress, the content of soluble protein (SP), malondialdehyde (MDA), and hydrogen peroxide (H2O2) showed gradual increases, while the activities of SOD and POD increased at first but then decreased afterwards. After continuous drought conditions, the activities of SOD and POD reached the highest after 15 days but decreased afterwards. Similarly, the activity of CAT reached its maximum on the 11th day but decreased afterwards. The protective enzyme system in root was significantly positively correlated with cell membrane-lipid peroxida-tion. [Conclusion]The protective enzyme system in sugarcane roots responded well to mild or moderate drought stress; on the other hand, the protective enzyme system responded poor to severe drought. Protective enzyme system of roots was closely related to the drought resistance of sugarcane; this research data could he advantageously used in drought resistance identification.关键词
甘蔗幼苗/根系/土壤/干旱胁迫/保护酶系统Key words
sugarcane seedling/ root system/ soil/ drought stress/ protective enzyme system分类
农业科技引用本文复制引用
郭元元,罗海斌,曹辉庆,何海波,杨翠芳,邓智年,魏源文,李杨瑞..土壤自然干旱胁迫对甘蔗幼苗根系保护酶系统的影响[J].南方农业学报,2012,43(9):1281-1286,6.基金项目
广西自然科学基金创新研究团队项目(2011GXNSFF018002) （2011GXNSFF018002）
广西科学研究与技术开发计划项目(桂科攻10100005-9) （桂科攻10100005-9）
广西科学基金项目(桂科基0778006-6,桂科基0832026,2010GXNSFA013102) （桂科基0778006-6,桂科基0832026,2010GXNSFA013102）
广西科学基金项目应用基础研究专项(桂科基0991021) （桂科基0991021）
广西农业科学院基本科研业务专项项目项目[200902Z(基)] （基）
