5种杜鹃花叶片生理特性对海拔高度适应性初探  

Preliminary Study on the Adaptability of Leaf Physiological Characteristics of Five Rhododendron Species to Altitude

作　　者：胡余楠 张涛[1] 胡菀 梁同军[1] 唐忠炳 彭焱松[1] Hu Yunan;Zhang Tao;Hu Wan;Liang Tongjun;Tang Zhongbing;Peng Yansong(Lushan Botanical Garden,Jiangxi Province and Chinese Academy of Sciences,Jiujiang 332900,China)

机构地区：[1]江西省、中国科学院庐山植物园,江西九江332900

出　　处：《中国野生植物资源》2024年第5期57-62,共6页Chinese Wild Plant Resources

基　　金：国家自然科学基金项目(41961009)。

摘　　要：目的:探究杜鹃花属(Rhododendron L.)植物在低海拔地区生长的适应性响应机制。方法:本研究选取5种杜鹃花属植物为研究对象,分别通过统计分析其叶片长宽比、光合色素含量、花青素含量、丙二醛含量差异及其与海拔之间的关系,初步探究了杜鹃花属植物在低海拔地区的形态、生理适应性响应机制。结果:(1)5种杜鹃花叶片的长宽比随海拔高度变化无显著变化规律;(2)5种杜鹃花叶片中叶绿素a、叶绿素b、花青素含量整体上随海拔的升高呈减少趋势;(3)白花杜鹃、杜鹃、锦绣杜鹃的丙二醛含量随海拔高度的增加而降低,鹿角杜鹃和猴头杜鹃的丙二醛含量随海拔的升高而增加,但鹿角杜鹃在两个海拔地的丙二醛含量均较低。结论:5种杜鹃花属植物在两种海拔栽培地均具有一定的生境适应性。Objective:To explore the adaptive response mechanisms of Rhododendron L.species grown at low altitudes.Methods:Five Rhododendron species were selected for this study.The relationship between altitude and leaf length/width ratio,photosynthetic pigment content,anthocyanin content,and malondialdehyde(MDA)level were analyzed to investigate their morphological and physiological adaptability in low-altitude areas.Results:(1)The leaf length/width ratios of the five Rhododendron species showed no significant changes with altitude variations.(2)The levels of chlorophyll a,chlorophyll b,and anthocyanins generally decreased as altitude increased.(3)MDA levels in R.mucronatum,R.simsii,and R.×pulchrum decreased with rising altitude,whereas those in R.latoucheae and R.simiarum increased,although R.latoucheae maintained lower MDA levels at both tested altitudes.Conclusion:The five Rhododendron species exhibited certain adaptability to both of the cultivation altitudes.

关 键 词：杜鹃花 海拔 引种栽培 适应性 

分 类 号：Q944[生物学—植物学]