CATALASE ACTIVITY OF WHEAT LEAF JUICE IN RELATION TO FROST RESISTANCE

1931 ◽  
Vol 5 (3) ◽  
pp. 333-336 ◽  
Author(s):  
R. Newton ◽  
W. R. Brown
Keyword(s):  
Winter Wheat ◽  
Catalase Activity ◽  
Frost Resistance ◽  
Late Summer ◽  
Winter Hardiness ◽  
Wheat Leaf ◽  
Wheat Leaves ◽  
Leaf Juice

The catalase activity of press-juice of winter wheat leaves collected from the field at any time during the late summer and fall was directly related to the winter hardiness of varieties.

Seasonal changes in the composition of winter wheat plants, in relation to frost resistance

1926 ◽  
Vol 16 (4) ◽  
pp. 522-538 ◽  
Author(s):  
R. Newton ◽  
W. R. Brown
Keyword(s):  
Moisture Content ◽  
Winter Wheat ◽  
Seasonal Changes ◽  
Frost Resistance ◽  
Winter Hardiness ◽  
Active Cell ◽  
The Press ◽  
Plant Constituents

1. The adaptation of plants to resist frost appears to depend on seasonal changes which give the protoplasm stability. A study has been made of the changes occurring in winter wheat plants, of varieties differing widely in winter hardiness, during the fall and winter months.2. By analysing the press-juice as well as the entire tissues at progressive dates, it has been possible to study the distribution of the more important constituents between the physiologically active cell fluids and the relatively inert supporting framework.3. One of the most important changes in the quantitative relations of the various plant constituents is the reduction in moisture content. This takes place to a greater degree in hardy varieties. The resulting concentration of colloids and sugars in the cell fluids increases the resistance to freezing.

scholarly journals Biochemical and Physicochemical Background of Mammalian Androgen Activity in Winter Wheat Exposed to Low Temperature

2017 ◽  
Vol 37 (1) ◽  
pp. 199-219 ◽  
Author(s):  
Anna Janeczko ◽  
Jolanta Biesaga-Kościelniak ◽  
Michał Dziurka ◽  
Maria Filek ◽  
Katarzyna Hura ◽  
...  
Keyword(s):  
Low Temperature ◽  
Winter Wheat ◽  
Lipid Membranes ◽  
Frost Resistance ◽  
Redox Homeostasis ◽  
Physiological Role ◽  
Cellular Level ◽  
Wheat Seedlings ◽  
Wheat Leaves ◽  
Induced Changes

Abstract Understanding of the physiological role of mammalian hormone—androstenedione (AN)—in plants is scant and the mechanisms of its action at a cellular level are practically unknown. The aim of this study was to investigate the physicochemical and biochemical background of AN activity in winter wheat exposed to low temperature. Cold periods are important in the lifecycle of this species as they induce frost resistance and further generative development. Wheat seedlings (control and AN-supplemented) were acclimated 2 weeks in cold and then exposed to frost (−12 °C). AN supplementation reduced frost damages by 30%. Moreover, AN also accelerated generative development of wheat. The AN-induced changes in redox homeostasis seemed to be important for processes of acclimation to low temperature and generative induction. AN influenced hormonal balance in wheat and stimulated accumulation among other gibberellins and cytokinins. For example, in aerial part of plants, the content of GA3 was increased by AN in 12 days of cold by about 30%, whereas the content of cis-zeatin was increased by 65%. AN was absorbed into plant membranes (Langmuir bath studies). The membrane absorption of AN increased the distance between lipid molecules and this may be an important step in the AN-induced enhancement of frost resistance. AN interaction with lipid membranes showed similarity to the interactions of some known regulators stimulating flowering in plants, and thus it may also underlie the acceleration of wheat development. Androstenedione was naturally present in wheat leaves (5–21 pg g−1 FW).

scholarly journals Effect of foliar fertilizer and fungicidal protection against leaf spot diseases on winter wheat

2012 ◽  
Vol 58 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Agnieszka Mączyńska ◽  
Mariola Głazek ◽  
Barbara Krzyzińska
Keyword(s):  
Winter Wheat ◽  
Leaf Area ◽  
Field Experiments ◽  
Plant Protection ◽  
Green Leaf ◽  
Foliar Fertilizer ◽  
Wheat Leaf ◽  
Wheat Leaves ◽  
Different Levels ◽  
Green Leaf Area

Field experiments were carried out in the seasons 2000/2001 and 2001/2002 in Plant Protection Institute, Sooenicowice Branch to assess the influence of foliar fertilizers such as Ekolist PK 1, Ekolist Mg, Mikrosol Z and Urea on healthiness of winter wheat. Foliar fertilizers were mixed with fungicides. The fungicides were applied at full or half recommended doses. The effect of the disease on wheat leaves was evaluated three times in each vegetation season. Remaining green leaf area (GLA) of leaves was also determined. GLA of the leaves F-1 was not significantly different for each combination with different fertilization and different levels of chemical treatment. The application of foliar fertilizer only had no effect on green leaf area (GLA). The results indicate that foliar fertilization of all experimental plots improved leaf condition and therefore halted the development of wheat leaf diseases. The increases of 1000 grain mass and yield was high for each plot where a fertilizer and a full or half dose of a fungicide was applied. Foliar fertilizing with no chemical control had no proven effect on studied parameters.

Rate of Photosynthesis and Transpiration of Winter Wheat Leaves and Ears Under Water Deficit Conditions

2008 ◽  
Vol 23 (2) ◽  
pp. 326-335
Author(s):  
Jacek Olszewski ◽  
Agnieszka Pszczółkowska ◽  
Tomasz Kulik ◽  
Gabriel Fordoński ◽  
Krystyna Płodzień ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Water Deficit ◽  
Rate Of Photosynthesis ◽  
Wheat Leaves

Non-Invasive Monitoring of the Light-Induced Cyclic Photosynthetic Electron Flow during Cold Hardening in Wheat Leaves

2006 ◽  
Vol 61 (9-10) ◽  
pp. 734-740 ◽  
Author(s):  
Simona Apostol ◽  
Gabriella Szalai ◽  
László Sujbert ◽  
Losanka P. Popova ◽  
Tibor Janda
Keyword(s):  
Winter Wheat ◽  
Electron Flow ◽  
Wheat Variety ◽  
Fluorescence Induction ◽  
Chlorophyll Fluorescence Induction ◽  
Light Conditions ◽  
Non Invasive ◽  
Photosynthetic Electron Flow ◽  
Temperature Hardening ◽  
Wheat Leaves

AbstractThe effect of irradiance during low temperature hardening was studied in a winter wheat variety. Ten-day-old winter wheat plants were cold-hardened at 5 °C for 11 days under light (250 μmol m-2 s-1) or dark (20 μmol m-2 s-1) conditions. The effectiveness of hardening was significantly lower in the dark, in spite of a slight decrease in the Fv/Fm chlorophyll fluorescence induction parameter, indicating the occurrence of photoinhibition during the hardening period in the light. Hardening in the light caused a downshift in the far-red induced AG (afterglow) thermoluminescence band. The faster dark re-reduction of P700+, monitored by 820-nm absorbance, could also be observed in these plants. These results suggest that the induction of cyclic photosynthetic electron flow may also contribute to the advantage of frost hardening under light conditions in wheat plants.

scholarly journals Association of Pestalotiopsis Guepinii (DESM.) Stay. with Bipolaris Leaf Blight (BpLB) Infected Wheat Leaves-A new Record

2016 ◽  
Vol 40 (1) ◽  
pp. 87-90
Author(s):  
Shamim Shamsi ◽  
Mst Selina Momtaz
Keyword(s):  
New Record ◽  
Leaf Blight ◽  
Wheat Varieties ◽  
Anamorphic Fungus ◽  
Wheat Leaf ◽  
Wheat Leaves ◽  
Academy Of Sciences

Pestalotiopsis guepinii (Desm.) Stay an anamorphic fungus belonging to the class Celomycetes was isolated from Bipolaris leaf blight (BpLB) infected wheat leaf of two wheat varieties namely, Balaka and Saurab during the period of February to March, 2011. Association of Pestalotiopsis guepinii with wheat is a new record.Journal of Bangladesh Academy of Sciences, Vol. 40, No. 1, 87-90, 2016

Sign in / Sign up

Export Citation Format

Share Document