Analvses of nhotosvnthetic pigment content and chlorophvli fluorescence parameter in leaves of different clones of Cinnamomum camphora
Photosynthetic pigment content and chlorophyll fluorescence parameter in leaves of eighteen clones of Cinnamomum camphora (L.) Presl were determined and their correlation was also analyzed. And cluster analysis of eighteen clones was carried out based on above determination results. The results show that contents of Chla, Chl6 and carotenoid in leaves of different clones are respectively 0.60-2. 26, 0.24-1. 15 and 0. 14-0.50 mg · g"1 with greater difference, and the difference among some clones is significant. In which, Chla content of clone BT2 is the highest and its Chlb and carotenoid contents are also higher among all clones. Differences of initial fluorescence ( Fo) , maximal photochemical efficiency of PS 11 ( F/Fm ) , potential activity of PS D ( Fy/F0 ) , electronic transfer case of PS 0 ( Fm/F0 ) , photochemical quenching coefficient (Qr) , non-photochemical quenching coefficient (NPQ) and actual photochemical efficiency of PS Q (Qy) among all clones are obvious, and those among some clones are significant. Differences of maximal fluorescence ( Fm ) , variable fluorescence ( F,) and fluorescencedecrease ratio ( RM ) are not significant among all clones. Among all of chlorophyll fluorescence parameters, Fo has a significantly positive correlation with Fm. Positive correlations between Fm with Fy, F/Fm, FyF0, Fm/F0 and between F/Fm with Fy, Fy/F0, Fm/F0, Qy are extremely significant, in which the correlation coefficients between F/Fm with F/Fo and Fm/F0 both are 0. 98. There is extremely significant positive correlation between Qp with NPQ and Ru, but the correlation between Qp with others parameters is generally negative. The positive correlations between Qy with Fm, Fy, FJFm, Fv/F0, Fm/F0 and between Rl6 with NPQ, Qp, Qy are significant or extremely significant. By euclidean distance method, eighteen clones are divided into two classes; the first class contains sixteen clones and the second class only contains clones PC5 and WP1. And the first class can be further divided into two sub-classes: the first sub-class only contains clone BY2, the second sub-class contains fifteen clones in which distance of clones BT1 and BT2 is the closest with the most similar photosynthetic physiological characteristics. According to these results, it is preliminarily inferred that potential photochemical activity and electronic transfer case of leaves of C. camphora clones commonly affect on light energy conversion efficiency of PS II and clones 116, 187, BT1 and MD1 have the better characters to use light energy. In addition, clone BT2 possesses the better photosynthesis characters.
Cinnamomum camphora ( L.) Preslclonephotosynthetic pigmentchlorophyll fluorescence parametercluster analysis
NETL
NSTL
万方数据
维普
