摘要
以马缨丹(Lantana camara)为试材,通过对其叶结构、光合色素含量及各项叶绿素荧光参数的测定分析,揭示马缨丹的光合生理特点,为马缨丹的观赏栽培等提供参考。结果表明:马缨丹叶片具有较厚的角质层和光合同化组织,栅栏组织结构紧密度达41.9,栅海比0.99,叶绿素含量为4.12 mg/g。光化学淬灭系数(qP)、非光化学淬灭系数(NPQ)在8:00—10:00呈下降趋势,当光强从190到1150μmol/m^(2)·s持续增大时,相对电子传递效率(ETR)持续上升、PSII的最大光合量子产量(Fv/Fm)明显降低、实际光能转化效率Y(Ⅱ)小幅增高后缓慢下降,且在PAR为285~420μmol/m^(2)·s范围内保持较高水平、非光化学淬灭的量子产量Y(NPQ)除了PAR在625μmol/m^(2)·s时略微下降之外,总体随PAR增强而增高。相关分析表明,马缨丹叶片的解剖结构与荧光参数之间存在相关关系,但均未达显著水平;叶绿素含量对6种荧光参数影响大小为ETR>Y(NPQ)>Y(Ⅱ)>NPQ>qP>Fv/Fm,叶绿素含量与ETR显著正相关。由此可见,马缨丹具有较强的光合性能,且对光强耐受力高,适应高温强日照环境。
Lantana camara taken as test material,its photosynthetic physiological characteristics were revealed by measuring and analyzing the leaf structure,photosynthetic pigment content and chlorophyll fluorescence parameters,so as to provide reference for ornamental cultivation of Lantana camara.The results showed that the Lantana camara leaves had thick cuticle and photosynthesized tissue,the density of palisade tissue was 41.9,the ratio of palisade tissue to spongy tissue was 0.99,and the content of chlorophyll was 4.12 mg/g.The photochemical quenching coefficient(QP)and non photochemical quenching coefficient(NPQ)decreased gradually from 8:00 to 10:00,indicating that the utilization rate of light energy was gradually increased.When the light intensity increased from 190 to 1150μmol/m^(2)·s,the relative electron transfer efficiency(ETR)continued to increase,the maximal PSII photochemical efficiency(Fv/Fm)decreased significantly,and the actual PSII photochemical efficiency Y(II)decreased slowly after a small increase,and maintained a high level when the PAR was 285-420μmol/m^(2)·s.The non photochemical quenching yield Y(NPQ)increased with the increase of PAR except that decreased slightly at 625μmol/m^(2)·s.Correlation analysis showed that there was a correlation between the anatomical structure and fluorescence parameters of Lantana camara leaves,but none of them reached a significant level;the effects of chlorophyll content on six fluorescence parameters were as follows:ETR>Y(NPQ)>Y(Ⅱ)>NPQ>qP>Fv/Fm,and chlorophyll content was positively correlated with ETR.Therefore,Lantana camara had strong photosynthetic performance and high tolerance to light intensity,which was suitable for the high temperature and strong sunshine environment.
作者
李焰焰
张紫薇
黄薇
聂传朋
LI Yanyan;ZHANG Ziwei;HUANG Wei;NIE Chuanpeng(College of Tea and Food Science,Wuyi University,Wuyishan 354300,China)
出处
《生物学杂志》
CAS
CSCD
北大核心
2022年第2期29-33,共5页
Journal of Biology
基金
福建省自然科学基金项目(2020J01405)
武夷学院高级引进人才科研启动项目(YJ201904、YJ202003)。
关键词
马缨丹
叶片结构
光合色素
叶绿素荧光参数
Lantana camara
leaf structure
photosynthetic pigment
chlorophyll fluorescence parameters
