نتایج جستجو برای: sporophyte
تعداد نتایج: 330 فیلتر نتایج به سال:
In plants, the germline lineages arise in later stages of life cycle as opposed to animals where both male and female germlines are set aside early in development. This developmental divergence is associated with germline specific or preferential expression of a subset of genes that are normally repressed for the rest of plant life cycle. The gene regulatory mechanisms involved in such long-ter...
Thylakoid membranes were isolated and purified from diploid filamentous sporophytes of Porphyra yezoensis Ueda using sucrose density gradient ultracentrifugation (SDGUC). After thylakoid membranes were solubilized with SDS, the phtosystem II (PSII) particles with high 2, 6-dichloroindophenol (DCIP) photoreduction activity were isolated by SDGUC. The absorption and fluorescence spectra, DCIP pho...
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1 Murray, J., Edinburgh, Proc. R. Soc., 10, 505 (1880). 2 Agassiz, A., Numerous paper in the Bulletins and Memoirs of the Museum of Comparative Zoology at Harvard and a general statement, London, Proc. R. Soc., 71,412 (1903). 8 Dole, R. B., The Carnegie Institution of Washington, Publication No. 182, Papers from the Tortugas Laboratory, 5, 711 (1914). 4 Tashiro, S., Year Book of the Carnegie In...
Restriction of phosphoenolpyruvate (PEP) supply to plastids causes lethality of female and male gametophytes in Arabidopsis thaliana defective in both a phosphoenolpyruvate/phosphate translocator (PPT) of the inner envelope membrane and the plastid-localized enolase (ENO1) involved in glycolytic PEP provision. Homozygous double mutants of cue1 (defective in PPT1) and eno1 could not be obtained,...
BACKGROUND AND AIMS Anthropogenic depletion of stratospheric ozone in Arctic latitudes has resulted in an increase of ultraviolet-B radiation (UV-B) reaching the biosphere. UV-B exposure is known to reduce above-ground biomass and plant height, to increase DNA damage and cause accumulation of UV-absorbing compounds in polar plants. However, many studies on Arctic mosses tended to be inconclusiv...
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