草业学报2016，Vol.25Issue(5)：30-39,10.DOI:10.11686/cyxb2015356
国审品种‘苏植1号’杂交结缕草抗旱性初步评价与分析
Preliminary evaluation of drought resistance for the hybrid zoysiagrass ‘Suzhi No.1’
摘要
Abstract
An experiment was carried out to evaluate the drought resistance of hybrid zoysiagrass ‘Suzhi No.1’, compared with Zoysia iaponica ‘Lanyin No.3’as the control.Plant materials were cultured in sand in PVC tubes in a greenhouse and drought treatments were implemented by withholding water.Leaf wilting (LW), leaf relative water content (RWC),root electrolyte leakage (REL),soil water content (SWC),root growth characteristics including root dry weight (RDW)and specific root length (SRL),as well as maximum quantum yield of PSⅡ (F v/F m )were measured under drought stress.The drought resistance of ‘Suzhi No.1’was ini-tially evaluated based on LW,RWC,REL and SWC.Both cultivars showed gradual increases in LW,exhibi-ting slight wilting on the 12th day of drought stress,moderate wilting on the 29th day and severe wilting after 40 days.SWC values decreased gradually with both cultivars displaying similar trends during the stress period. Drought stress also caused significant declines in RWC and rises in REL.By the end of the treatment (40th day),no differences in LW,RWC,REL and SWC were found indicating that the performance of ‘Suzhi No.1’ was similar to ‘Lanyin No.3’under drought stress.Although ‘Suzhi No.1’had smaller RDW to ‘Lanyin No.关键词
‘苏植 1 号’杂交结缕草/抗旱性/评价/根系生长特性/最大光化学量子产量Key words
hybrid zoysiagrass ‘Suzhi No.1’/drought resistance/evaluation/root growth characteristic/maxi-mal quantum yield of PSⅡ引用本文复制引用
汪毅,郭海林,陈静波,宗俊勤,李丹丹,姜亦巍,刘建秀..国审品种‘苏植1号’杂交结缕草抗旱性初步评价与分析[J].草业学报,2016,25(5):30-39,10.基金项目
国家自然科学基金海外及港澳学者合作研究基金（31328019），江苏省水利科技项目（2014001，2014019）和江苏省科技基础设施建设项目（BM2015019）资助。 （）
