摘要
以6份柱花草(Stylosanthes guianensis)种质为材料,采用水培法,分析15%PEG-6000模拟干旱处理对柱花草生长的影响,并综合评价柱花草种质的抗旱性。结果表明:15%PEG处理显著抑制了柱花草的生物量、根系生长、叶绿素浓度(SPDA)及最大光化学效率(F_v/F_m),并显著增加了丙二醛(MDA)含量,但不同种质的抗旱性存在差异。运用隶属函数法对柱花草抗旱性进行综合分析,结果表明:种质TF227和TF210抗旱能力最强,为抗旱型柱花草,R^2和R5次之,TF226和TF244抗旱能力最弱。植株鲜重、地上部鲜重、丙二醛含量、叶绿素浓度和F_v/F_m可作为评价柱花草抗旱能力的指标。
Plant growth and drought resistance of six Stylosanthes guianensis（ stylo） accessions were investigated under 15% PEG-induced drought stress in hydroponics. Results showed that plant biomass, root growth, chlorophyll concentration（ SPDA） and the maximum photochemical efficiency（ F_v/F_m） of stylo accessions were differentially inhibited by 15% PEG treatment, whereas malondialdehyde（MDA） content in stylo increased under drought stress.Comprehensive analysis showed that TF227 and TF210 exhibited the superior ability of drought stress resistance,followed by R^2 and R5, while TF226 and TF224 were susceptible stylo accessions. Furthermore, the changes in plant fresh weight, shoot fresh weight, MDA content, SPDA and F_v/F_mwere regarded as the reference indices used for the evaluation of drought resistance in stylo.
出处
《热带作物学报》
CSCD
北大核心
2017年第10期1790-1795,共6页
Chinese Journal of Tropical Crops
基金
国家牧草产业技术体系岗位科学家项目(No.CARS-35)
海南省自然科学基金项目(No.317268)
中国热带农业科学院基本科研业务费专项资金(No.1630032017045、1630032016010、1630032017082)
物种品种资源保护项目
关键词
柱花草
干旱胁迫
抗旱性
综合评价
Stylosanthes
drought stress
drought resistance
comprehensive evaluation
