The response of stomatal parameters of four rice cultivars to atmospheric elevated CO2 concentration (EC) was studied using open top chambers. EC brought about reduction in stomatal conductance and increase in stomatal index, size of stomatal guard cells, stroma, and epidermal cells. Such acclimation helped the regulation of photosynthesis to EC. These changes in stomatal characters made rice cultivars adjustable to EC environment. and D. C. Uprety ... [et al.].
The chlorophyll (Chl) and protein degradation during dark incubation of leaf discs was reduced by Sr2+, Ca^^, and spermine (Spm) treatments. Sr2+ inhibited most effectively the Chl degradation, which was remarkable 48 h after the treatment. The Chl degradation appeared in control discs within 24 h in the dark and Chl content decreased by about 50 % during 96 h. The proteins retained at least during 48 h of dark treatment in the presence of Sr2+, Ca2+, or Spm. The retardation effect of Sr2+, Ca2+ and Spm on the Chl loss and the disintegration of thylakoid membrane proteins may be due to a cationic protection of thylakoid membranes.
Družice Suomi-NPP je prototypem nové generace meteorologických družic JPSS. Jejím hlavním přístrojem je VIIRS, navazující na radiometry AVHRR a MODIS družic NOAA/POES, resp. Terra/Aqua. Jeho zcela novou součástí je vysoce citlivý přístroj DNB (Day/Night Band) určený primárně pro noční snímání Země a její atmosféry. Příspěvek dokumentuje citlivost přístroje DNB na několika vybraných příkladech., The Suomi/NPP satellite is a prototype of a new generation of weather satellites, JPSS. Its main instrument is VIIRS, a follow-up instrument of the NOA/POES and Metop AVHRR radiometer, and of the Terra/Aqua MODIS instrument. One of its main advances is a brand new Day/Night Band (DNB), designed primarily for night-time imaging of the Earth and its atmosphere. This short article documents the ultimate DNB low-light sensitivity of several selected cases., Martin Setvák., and Obsahuje seznam literatury