scholarly journals Resistance to Low Temperature Photoinhibition Is Not Associated with Isolated Thylakoid Membranes of Winter Rye

1991 ◽  
Vol 97 (2) ◽  
pp. 804-810 ◽  
Author(s):  
Line Lapointe ◽  
Norman P. A. Huner ◽  
Robert Carpentier ◽  
Christina Ottander
Keyword(s):  
Low Temperature ◽  
Thylakoid Membranes ◽  
Winter Rye

Lipid polymers accumulate in the epidermis and mestome sheath cell walls during low temperature development of winter rye leaves

PROTOPLASMA ◽  
1985 ◽  
Vol 125 (1-2) ◽  
pp. 53-64 ◽  
Author(s):  
Marilyn Griffith ◽  
N. P. A. Huner ◽  
K. E. Espelie ◽  
P. E. Kolattukudy
Keyword(s):  
Low Temperature ◽  
Cell Walls ◽  
Winter Rye ◽  
Sheath Cell ◽  
Mestome Sheath ◽  
Temperature Development

Effect of Membrane Fluidity on Photoinhibition of Isolated Thylakoids Membranes at Room and Low Temperature

2001 ◽  
Vol 56 (5-6) ◽  
pp. 369-374 ◽  
Author(s):  
Maya Velitchkova ◽  
Antoaneta Popova ◽  
Tzvetelina Markova
Keyword(s):  
Low Temperature ◽  
Membrane Fluidity ◽  
Light Stress ◽  
Photosynthetic Apparatus ◽  
Chemical Properties ◽  
Thylakoid Membranes ◽  
High Light Intensity ◽  
Photochemical Activity ◽  
High Light ◽  
Time Dependencies

The relationship between thylakoid membrane fluidity and the process of photoinhibition at room and low (4 °C) temperature was investigated. Two different membrane perturbing agents - cholesterol and benzylalcohol were applied to manipulate the fluidity of isolated pea thylakoids. The photochemical activity of photosystem I (PSI) and photosystem II (PSII), polarographically determined, were measured at high light intensity for different time of illumination at both temperatures. The exposure of cholesterol- and benzylalcohol-treated thylakoid membranes to high light intensities resulted in inhibition of both studied photochemical activities, being more pronounced for PSII compared to PSI. Time dependencies of inhibition of PSI and PSII electron transport rates for untreated and membranes with altered fluidity were determined at 20 °C and 4 °C. The effect is more pronounced for PSII activity during low-temperature photoinhibition. The data are discussed in terms of the determining role of physico-chemical properties of thylakoid membranes for the response of photosynthetic apparatus to light stress.

Low temperature delays development of photosystem II activity in winter rye leaves

1989 ◽  
Vol 77 (1) ◽  
pp. 115-122 ◽  
Author(s):  
Marilyn Griffith ◽  
Heather C. H. McIntyre ◽  
Marianna Krol
Keyword(s):  
Low Temperature ◽  
Photosystem Ii ◽  
Winter Rye ◽  
Photosystem Ii Activity

An appropriate physiological control for environmental temperature studies: comparative growth kinetics of winter rye

1984 ◽  
Vol 62 (5) ◽  
pp. 1062-1068 ◽  
Author(s):  
M. Krol ◽  
M. Griffith ◽  
N. P. A. Huner
Keyword(s):  
Low Temperature ◽  
Leaf Area ◽  
Growth Response ◽  
Dry Weight ◽  
Maximum Growth ◽  
Cold Hardening ◽  
Lag Phase ◽  
Winter Rye ◽  
Kinetics Of ◽  
Leaf Dry Weight

The accurate interpretation of physiological and biochemical alterations observed in plants grown under contrasting environmental conditions requires knowledge of their relative physiological ages. For this purpose, we compared the growth kinetics of winter rye (Secale cereale L. cv. Puma) at nonhardening and cold-hardening temperatures. Growth at nonhardening temperatures was characterized by a 10-day lag phase with the attainment of maximum growth after about 28 days. Growth at cold-hardening temperatures resulted in an extension of the lag phase to about 21 days with maximum growth being attained after 56 days. The calculated growth coefficient at cold-hardening temperatures was 35–40% of that at nonhardening temperatures. This relationship was consistent with growth parameters such as leaf dry weight, fresh weight, and area, but not with plant height. Although total leaf dry weight and total number of leaves per plant did not differ between nonhardened and cold-hardened plants at maximum growth, total leaf area per plant and stretched plant height was 3- to 4-times greater in nonhardened than in cold-hardened plants. This resulted in a fourfold increase in leaf dry weight per leaf area during growth at low temperature in contrast to the maintenance of a constant ratio during growth at nonhardening conditions. The increase in this ratio during low temperature growth was, in part, accounted for by a decrease in water content and an increase in cytoplasmic content. These results were confirmed by the investigation of growth on an individual leaf basis. However, the growth response of leaves 1 and 2 differed from that of leaves 3 and 4 when the leaf dry weight: leaf area ratio was measured as a function of time at cold-hardening temperatures. This indicates that the stage of leaf development influences its growth response to an altered environment. The results of the development of leaf freezing tolerance indicated that maximum vegetative growth appeared to coincide with maximum freezing tolerance of leaves from cold-hardened plants (−22 °C) but not of leaves from unhardened plants (−11 °C).

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