Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Chloroplast thylakoid membrane fluidity and its sensitivity to temperature (1984)
    Springer
    Planta 161 (1984), S. 375-380 
    Details
    ISSN: 1432-2048
    Keywords: Chloroplast (membrane fluidity ; Fluorescence (polarization, temperature) ; Lipid (thylakoid membrane) ; Membrane (fluidity, temperature) ; Photosynthesis ; Pisum (thylakoid membrane) ; Thylakoid membrane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In order to investigate membrane fluidity, the hydrophobic probe, 1,6-diphenyl-1,3,5-hexatriene (DPH), has been incorporated into intact isolated thylakoids and separated granal and stromal lamellae obtained from the chloroplasts of Pisum sativum. The steady-state polarization of DPH fluorescence was measured as a function of temperature and indicated that at physiological values the thylakoid membrane is a relatively fluid system with the stromal lamellae being less viscous than the lamellae of the grana. According to the DPH technique, neither region of the membrane, however, showed a sharp phase transition of its bulk lipids from the liquid-crystalline to the gel state for the temperature range -20° to 50° C. Comparison of intact thylakoids isolated from plants grown at cold (4°/7°C) and warm (14°/17° C) temperatures indicate that there is an adaptation mechanism operating which seems to maintain an optimal membrane viscosity necessary for growth. Using a modified Perrin equation the optimal average viscosity for the thylakoid membrane of the chill-resistant variety used in the study (Feltham First) is estimated to be about 1.8 poise.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00398729
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Adaptation of photosynthetic electron-transport rate to growth temperature in pea (1986)
    Springer
    Planta 169 (1986), S. 429-436 
    Details
    ISSN: 1432-2048
    Keywords: Chloroplast ; Electron transport ; Photosynthesis ; Pisum (electron transport) ; Temperature adaptation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pea (Pisum sativum L. cv. Feltham First) plants were germinated and grown under two temperature regimes, one chilling (6–8° C) and one non-chilling (16–18° C), which are referred to as “cold-grown” and “warm-grown”, respectively. It was found that: (1) At saturating light intensity and with excess CO2, cold-grown leaves exhibited faster rates of oxygen evolution than warm-grown leaves when measured below 15° C. However when measurements were carried out above this temperature, the reverse relationship was observed. (2) Full-chain electron-transport measurements on thylakoids showed that those isolated from cold-grown plants had greater light-saturated uncoupled rates than their warm-grown equivalents at all temperatures between 3 and 19° C. (3) This difference was apparently not due to a greater activity of photosystem I or II in the thylakoids from cold-grown plants, but rather to a more rapid turnover of a dark step within the electron-transport chain. These results are interpreted in terms of a previously reported apparent homeoviscous adaptation of the pea thylakoid membrane to growth temperature (J. Barber, R.C. Ford, R.A.C. Mitchell, P.A. Millner, 1984, Planta 161, 375–380).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392141
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...