CAJ | 학술논문

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。
이룡선화화세협룡선화위재료，이상온（25℃좌우）위대조，분별측정재30℃、35℃、40℃、45℃、50℃조건하룡선화협편내병이철（ MDA）화유리포안산함량、초양화물기화매（ SOD）활성급기상대전도솔등생리생화지표，분석기내열성。결과표명：불동온도처리하，2충룡선화협편균수도불동정도상해，기상대전도솔화유리포안산함량수온도적승고이증가；이MDA함량화SOD활성균수온도적승고정현선상승후하강적추세，표명룡선화구유일정적항열성，능통과일계렬보호성적생리생화반응괄응일정정도적고온협박；룡선화MDA증폭대우세협룡선화，표명세협룡선화적내열성비룡선화경강。
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.