高温胁迫对2种龙船花生理指标的影响  

Effects of High Temperature Stress on Physiological Indicators of 2 Ixora Species

作　　者：陆銮眉[1] 林金水[2] 黄丽红[1] 林莹[1] 

机构地区：[1]闽南师范大学生物科学与技术系,福建漳州363000 [2]福建省热带作物科学研究所,福建漳州363001

出　　处：《福建林业科技》2014年第2期26-29,共4页Journal of Fujian Forestry Science and Technology

基　　金：福建省科技重点项目(龙船花植物遗传多样性和繁育技术体系研究;2012N0032);闽南师范大学园林植物生长发育与生态配置创新团队(2013)

摘　　要：以龙船花和细叶龙船花为材料,以常温(25℃左右)为对照,分别测定在30℃、35℃、40℃、45℃、50℃条件下龙船花叶片内丙二醛(MDA)和游离脯氨酸含量、超氧化物歧化酶(SOD)活性及其相对电导率等生理生化指标,分析其耐热性。结果表明:不同温度处理下,2种龙船花叶片均受到不同程度伤害,其相对电导率和游离脯氨酸含量随温度的升高而增加;而MDA含量和SOD活性均随温度的升高呈现先上升后下降的趋势,表明龙船花具有一定的抗热性,能通过一系列保护性的生理生化反应适应一定程度的高温胁迫;龙船花MDA增幅大于细叶龙船花,表明细叶龙船花的耐热性比龙船花更强。In order to study the heat resistance ,taking Ixora.chinensis Lamarck and I.williamsii cv.Dwarf Salmon as the materials and the common temperature （about 25 ℃）as the control,the changes of malondianldehyde （MDA）,proline contents,superoxide dismutase （SOD） activity in leaves and relative conductance rate of leaves of Ixora.chinensis and I.williamsii with 30,35,40,45and 50℃（ normal temperature as the contrast ） heat stress for 24 hours were determined respectively.The results showed that ,under dif-ferent temperature ,leaves of 2 Ixora species suffered different levels of damage ,relative conductance rate and proline contents of lev-els increased all the way and the temperature was higher ,the change was more dramatic ,while MDA contents and SOD activity first climbed up then went down ,it was found that the Ixora had a strong hot-resistance,and could adapt a certain degree of high tempera-ture stress through a series of physiological and biochemical reaction ,I.williamsii was more resistant to high-temperature stress than I.chinensis.

关 键 词：龙船花 细叶龙船花 耐热性 生理指标 

分 类 号：S685[农业科学—观赏园艺]