CAJ | 학술논문

从美国引进的39个高羊茅草坪草种分成了5个生态类型,在1999-2000年从每类中找出一个具有典型性状的草种,测定其周年草坪坪质表现、根系活力、叶片可溶性糖含量变化,同时测定各类草种在高温胁迫下保护酶活性与质膜透性的变化.结果表明,根系活力及可溶性糖含量在一定程度上影响着草坪坪质的周年变化.同时,草坪草叶片MDA含量的增长率和草坪草叶片的质膜透性增长率具有显著的正相关效应.在40 ℃高温胁迫下,草坪草叶片SOD与POD相对活性和MDA含量的增长率及PMP增长率具有显著的负相关效应,5个草种对高温的抗性能力大小顺序是:Gooden＞Regiment＞Tomahawk＞SR-8210＞Brandy.在此基础上,最后对草坪草抗性的准确快速检测方法进行了讨论.
종미국인진적39개고양모초평초충분성료5개생태류형,재1999-2000년종매류중조출일개구유전형성상적초충,측정기주년초평평질표현、근계활력、협편가용성당함량변화,동시측정각류초충재고온협박하보호매활성여질막투성적변화.결과표명,근계활력급가용성당함량재일정정도상영향착초평평질적주년변화.동시,초평초협편MDA함량적증장솔화초평초협편적질막투성증장솔구유현저적정상관효응.재40 ℃고온협박하,초평초협편SOD여POD상대활성화MDA함량적증장솔급PMP증장솔구유현저적부상관효응,5개초충대고온적항성능력대소순서시:Gooden＞Regiment＞Tomahawk＞SR-8210＞Brandy.재차기출상,최후대초평초항성적준학쾌속검측방법진행료토론.
Thirty-nine tall fescue varieties introduced from America were devided into five ecotypes, from which five cultivars were collected for testing the changes of turf quality, root activity, soluble sugar content around years,meanwhile antioxidant enzyme activity, lipid proxidation etc under heat stress conditions were tested too in 1999-2000.The results indicated that changes of root activity and content of soluble sugar in the leaves were to some extent responsible for adjusting the stress-resistance in heat stresses, It implied that the two parameters had a great effect on the turf quality of tall fescue around the year.It was also indicated that the increasing rate of MDA content was significantly positively correlated with the changes of electrolyte leakage in the leaves of turf grass. When exposed to 40 ℃ heat stress,the relative activities of superoxide dismutase(SOD) and peroxidase(POD) in the leaf of turf cultivars concerned were significantly negatively correlated with malonaldehyde(MDA) and electrolyte leakage.Based on the index of active oxygen and electrolyte leakage, the ability of heat tolerance in the five ecotypes of tall fescue was in order:Gooden＞Regiment＞Tomahawk＞SR-8210＞Brandy. Finally, a rapid accurate laboratory procedure of measuring turf grass tolerance to heat was also disscussed.