The effect of salinity on some morpho-physiological characteristics in lisianthus cultivars was investigated. Cultivars namely, Blue Picotee (C1), Champagne (C2), Lime Green (C3), and Pure White (C4), were subjected to salt stress (0-60 mM NaCl) in a sand culture and their responses were measured. Our results showed that as a salinity level increased, growth parameters, relative water content, photosynthetic pigments, and gas-exchange characteristics decreased in all cultivars, while root fresh mass, root/shoot length ratio, electrolyte leakage, and a malondialdehyde content increased. However, the changes were less pronounced in C3 and C4 compared to C1 and C2. The regression analysis of the relationship between salinity levels and seedling height or root/shoot length ratio defined two groups with different slope coefficients: C1 and C2 as salt-sensitive cultivars and C3 and C4 as salt-tolerant cultivars. Shoot dry mass and leaf area tolerance indices were less affected by salinity in C3 and C4 compared to those in C1 and C2. Further, C3 and C4 showed higher photosynthetic rates, greater stomatal conductances, and accumulated greater K+ and Ca2+ contents and K+/Na+ ratios in roots and shoots compared to those in C1 and C2. The results suggests that C3 and C4 could be recommended as resistant cultivars due to maintaining higher growth, water balance, leaf gas exchange, ion compartmentalization, and lower lipid peroxidation in response to salinity compared to C1 and C2., N. Ashrafi, A. Rezaei Nejad., and Obsahuje bibliografii
This article analyses six Northitalian Dominican liturgical codices with musical notation held by the Archbishop Library of the Kroměříž Castle which were bought in Vienna by Theodor Kohn, the archbishop of Olomouc, in 1895. Three of them are antiphonaries, three psalteries which bring evidence of the musical state of liturgy in the Lombardian Dominican Province from the 14th century´s first decennies until the 18th century. Four of them (nrs. 1–4) are valuable documents of the Northitalian illumination of the 14th – 17th centuries of Bononian and Ferrara´s circuits.
This article analyses six Northitalian Dominican liturgical codices with musical notation held by the Archbishop Library of the Kroměříž Castle which were bought in Vienna by Theodor Kohn, the archbishop of Olomouc, in 1895. Three of them are antiphonaries, three psalteries which bring evidence of the musical state of liturgy in the Lombardian Dominican Province from the 14th century´s first decennies until the 18th century. Four of them (nrs. 1–4) are valuable documents of the Northitalian illumination of the 14th – 17th centuries of Bononian and Ferrara´s circuits.
This article analyses six Northitalian Dominican liturgical codices with musical notation held by the Archbishop Library of the Kroměříž Castle which were bought in Vienna by Theodor Kohn, the archbishop of Olomouc, in 1895. Three of them are antiphonaries, three psalteries which bring evidence of the musical state of liturgy in the Lombardian Dominican Province from the 14th century´s first decennies until the 18th century. Four of them (nrs. 1–4) are valuable documents of the Northitalian illumination of the 14th – 17th centuries of Bononian and Ferrara´s circuits.
Pigments absorbing 350-1,050 nm radiation have had an important role on the Earth for at least 3.5 billion years. The ion pumping rhodopsins absorb blue and green photons using retinal and pump ions across cell membranes. Bacteriochlorophylls (BChl), absorbing in the violet/blue and near infra red (NIR), power anoxygenic photosynthesis, with one photoreaction centre; and chlorophylls (Chl), absorbing in the violet/blue and red (occasionally NIR) power oxygenic photosynthesis, with two photoreaction centres. The accessory (bacterio)chlorophylls add to the spectral range (bandwidth) of photon absorption, e.g., in algae living at depth in clear oceanic water and in algae and photosynthetic (PS) bacteria in microbial mats. Organism size, via the package effect, determines the photon absorption benefit of the costs of synthesis of the pigment-protein complexes. There are unresolved issues as to the evolution of Chls vs. BChls and the role of violet/blue and NIR radiation in PS bacteria., A. W. D. Larkum, R. J. Ritchie, J. A. Raven., and Obsahuje bibliografické odkazy
Scanning tunnelling microscopy of intact D1/D2/CP47/CP43 photosystem 2 (PS2) core complexes and CP43-deleted D1/D2/CP47 core complexes shows definitively that the CP43 subunits reside at the ends of the dimeric core complex. The CP43-removal procedure produces CP43-deleted cores with minimal conformational distortion to the D1/D2/CP47 residual core complex. There was excellent agreement between the X-ray and STM structures for the intact core complex, and between the STM image for the CP43-deleted core complex and the X-ray model with the components assigned to CP43 omitted. and C. S. Barton, P. B. Lukins.
Chloroplasts of barley plants grown under red light (RL, 660 nm) dramatically differed from the chloroplasts of plants raised under blue light (BL, 450 nm) or control plants (white light). The chloroplasts under RL had an extensive membrane system with high stacking degree and disordered irregular shaped stacks (shaggy-formed grana). After 5 h in darkness, dynamic rearrangements of chloroplast architecture in RL- and especially BL-grown plants were restricted compared with control plants. The light spectral quality affected the content and proportions of photosynthetic pigments. The leaves of RL-grown plants had the increased ratio of low-temperature fluorescence bands, F741/F683, corresponding to emission of PSI and PSII, respectively. This increase can be related to specific architecture of chloroplasts in RL-treated plants, providing close spacing between the two photosystems, which enhances energy transfer from PSII to PSI and facilitates the movement of LHCII toward PSI., G. V. Kochetova, O. B. Belyaeva, D. S. Gorshkova, T. A. Vlasova, E. M. Bassarskaya, T. V. Zhigalova, O. V. Avercheva., and Obsahuje bibliografii