The age dependence of the photosynthetic performance, chlorophyll fluorescence and chloroplast ultrastructure of green form and Chl ft-deficient form (aurea) of tobacco Su/su mutant were compared. The most pronounced differences between the aurea and green tobacco found in young leaves diminished with leaf age. Slower accumulation of the photosynthetic pigments during the development of aurea leaves was accompanied by a slower accumulation of LHC antennae of both photosystems, particularly that of PS2, and by retention of an increase in the capacity of PS2 photochemistry, measured as Fy/FM The ratio Fv/Fm, however, increased rapidly during maturation of aurea leaves, and fmally the mature aurea leaves exhibited higher values of this ratio than the green ones. Rates of photosynthesis at saturating irradiance (Epiax) saturating CO2 concentration (/’sat) decreased with leaf age for both aurea and green tobacco, being always higher in aurea leaves than in leaves of green tobacco of comparable age. AU these characteristics indicated retarded development of aurea leaves. Also the chloroplast ultrastructure, particularly grana formation, exhibited slower development. The decrease in /Wx and with leaf age in both tobacco forms and retardation in the development of aurea leaves can explain higher value of usually found in aurea tobacco.
Tato recenzní studie sleduje analogii, na níž založil svoji metodu bádání i psaní Douglas R. Hofstadter v knize Gödel, Escher, Bach (Praha: Argo – Dokořán 2012, 830 s.). Proti Hofstadterovu pojetí analogie, kromě jiného ilustrované zavádějícími příklady skladeb J. S. Bacha, je analogie v této studii precizována. Zároveň jsou ve studii napraveny nedostatky hudebních příkladů, jež by patrně neodhalili čtenáři bez přímé vazby na hudební teorii. Tyto aspekty sleduje tato studie až k závěru, že recenzovaná vlivná kniha, neprávem aspirující na metodologii veškerenstva, patří mezi poulárně naučnou literaturu., This book review study observes the analogy, which has formed a basis for Douglas R. Hofstadter’s method of research and writing in the book Gödel, Escher, Bach (Prague: Argo – Dokořán 2012, 830 p.). As opposed to Hofstadter’s concept of analogy, besides other issues illustrated by misleading examples of J. S. Bach’s composition work, the analogy in this study is given a more precise exactitude. At the same time the insufficiencies of musical examples, which would probably not be revealed by readers without direct linkage to the musical theory, are being corrected in this study. These aspects are followed in this study towards the conclusion, that the influential book under this review, wrongfully aspiring to the universal methodology, belongs to the general non-fiction literature., and Alena Hönigová, Jaroslav Mestek.