南方农业学报2012，Vol.43Issue(8)：1114-1120,7.DOI:10.3969/j:issn.2095-1191.2012.08.1114
干旱胁迫对甘蔗生长生理的影响及品种抗旱性评价
Impact of drought stress on sugarcane growth physiology and evaluation on drought resistance of sugarcane cultivars
摘要
Abstract
[Objective]The present study was conducted to investigate the differences of drought resistance in different sugarcane cultivars at different growth stages to provide references for drought resistance evaluation and sugarcane breeding. [Method] Three sugarcane cultivars viz.,GT28,GT21 and ROC22,planted in buckets,were used as test materials. Plant height and seven other indexes were determined under natural drought stress,and drought resistance was evaluated using subordinate function in fuzzy mathematics. [Result]Under repeated drought stress,growth vigor of sugarcane plant slowed down,water potential and chlorophyll content in leaves were reduced,and cytoplasm membrane permeability and content of proline and malondialdehyde in leaves increased. For different growth stages,sugarcane growth vigor,water potential,proline content and peroxidase (POD) activity in sugarcane leaves changed more significantly at seedling stage,while malondialdehyde content,leaf cytoplasmic membrane permeability and content of soluble protein and chlorophyll in leaves changed more obviously at elongation stage. Among different sugarcane cultivars,GT21 had relative higher contents of water potential,malondialdehyde,soluble protein,and chlorophyll and lower cytoplasm membrane permeability,free proline content,and POD activity; ROC22 had higher plant height,the cytoplasm membrane permeability,proline content ,and POD activity; however it had lower water potential,malondialdehyde,and soluble protein content in leaves compared to those of GT21. The overall drought resistance of the three sugarcane cultivars were as followed: GT21 > ROC22> GT28. [Conclusion] Agronomic traits and physiological indexes showed significant differences in different sugarcane varieties under drought stress,but no obviously consistant and accumulative effects of repeated drought stress (at seedling and elongating stages) were found. Subordinate function method could more accurately and comprehensively evaluate the drought resistance of sugarcane cultivars.关键词
甘蔗/干旱胁迫/生理生化/抗旱性/评价Key words
sugarcane/drought stress/physiology and biochemistry/drought resistance/evaluation分类
农业科技引用本文复制引用
杨建波,诸葛少军,黎海涛,杨丽涛,李杨瑞..干旱胁迫对甘蔗生长生理的影响及品种抗旱性评价[J].南方农业学报,2012,43(8):1114-1120,7.基金项目
科技部国际合作项目(2008DFA30600,2009DFA30820) （2008DFA30600,2009DFA30820）
广西科学研究与技术开发计划项目(桂科产1123008-1) （桂科产1123008-1）
广西自然科学基金创新团队项目(2011GXNSFF018002) （2011GXNSFF018002）
广西农业科学院创新团队项目(桂农科2011YT01) （桂农科2011YT01）
