不同海拔麻花艽植物光合特性的比较
Photosynthetic Characteristics of Gentiana straminea at Different Altitudes

李惠梅师生波

文摘	[目的]探讨不同海拔下麻花艽植物的光合特性.[方法]通过植物先合作用对光强、温度和CO_2的响应和酶活性的比较,研究了不同海拔麻花艽植物的光合性质.[结果]高海拔的海北麻花艽植物光合作用受到低温、强光、低气压的限制.低海拔的西宁麻花艽植物的净光合速率较高,但是高海拔的海北麻花艽植物的超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)和抗坏血酸过氧化物酶(AP)的活性和丙二醛(MDA)的含量高于西宁的麻花艽植物.[结论]低海拔的麻花艽植物光合潜力和温度适应范围广,引种栽培具有极大的优势,但是高温有可能造成光抑制,会降低光合生产力.高海拔的海北麻花艽植物光合色素的含量较低但具有较高的抗氧化酶的活性,保护了光合机构免遭破坏.
其他语种文摘	[Objective] The research aimed to explore photosynthetic characteristics of Gentiana straminea at different aititude.[Method] The photosynthetic characteristics in different light,temperature,CO_2 and the activities of SOD,POD,CAT,AP and the content of MDA were studied.[Result] The results showed that the photosynthesis of Gentiana straminea was always restricted by stronger radiation,lower air press and lower temperature in Haibei.Net Photosynthetic rate(Pn) of Gentiana straminea was higher in Xining than in Haibei.But the activities of SOD,POD,CAT,AP and the content of MDA were higher than in Xining.[Conclusion] Gentiana straminea extensive photosynthetic potential and better adaption in Xining.So it was propitious to plant.However,the highest temperature could result in photoinhibition.The pigment content of Gentiana straminea in Haibei was lower than in Xining,but the activities of antioxidases were higher than in Xining,it was responsived for protecting photosynthetic apparatus.
来源	安徽农业科学 ,2008,36(11):4799-4804 【扩展库】
关键词	麻花艽 ; 不同海拔 ; 光合作用
地址	中国科学院西北高原生物研究所, 青海, 西宁, 810008
语种	中文
文献类型	研究性论文
ISSN	0517-6611
学科	农作物
文献收藏号	CSCD:3266566