BIOMAGNETIC RESPONSES IN KHARKOV 22 M.C. WINTER WHEAT

1967 ◽  
Vol 47 (4) ◽  
pp. 389-393 ◽  
Author(s):  
U. J. Pittman

Pregermination exposure of Kharkov 22 M.C. winter wheat seeds (Triticum aestivum L.) to introduced magnetic fields resulted in a stable, temperature-independent enhancement of seedling growth rate. The level of magnetic intensity required to give maximum response appears to be between 0.5 and 100 oersteds when applied for 240 hours.

2008 ◽  
Vol 0 (1(7)) ◽  
pp. 100-105
Author(s):  
О. О. Шовгун ◽  
В. В. Шелепов ◽  
В. М. Лисікова ◽  
С. О. Ляшенко ◽  
С. Л. Чухлєб ◽  
...  

2013 ◽  
Vol 14 (1&2) ◽  
pp. 93-96
Author(s):  
Richa Kohli ◽  
Piyush Malaviya

The present study has been focussed on the effect of untreated tannery effluent on germination, seedling growth and pigment contents of wheat (Triticum aestivum L. var. PBW-373).Germination studies were conducted with wheat seeds having various concentrations of (4.5, 9, 13.5, and 18%) tannery effluent and five treatments (Eo, E4.5, E9, E13.5 and E18).The +ve germination parameters i.e. cumulative percent germination, germination index etc. found to be maximum in E4.5. The –ve germination parameters like delay index, percent inhibition showed minimum values for E4.5. Growth parameters also decreased with increase in effluent concentration. The pigment contents i.e. chlorophyll-a and chlorophyll-b also showed good results at E4.5.


2021 ◽  
Vol 22 (6) ◽  
pp. 2855
Author(s):  
Anna Janeczko ◽  
Jana Oklestkova ◽  
Danuše Tarkowská ◽  
Barbara Drygaś

Ecdysteroids (ECs) are steroid hormones originally found in the animal kingdom where they function as insect molting hormones. Interestingly, a relatively high number of these substances can also be formed in plant cells. Moreover, ECs have certain regulatory effects on plant physiology, but their role in plants still requires further study. One of the main aims of the present study was to verify a hypothesis that fenarimol, an inhibitor of the biosynthesis of ECs in the animal kingdom, also affects the content of endogenous ECs in plants using winter wheat Triticum aestivum L. as a model plant. The levels of endogenous ECs in winter wheat, including the estimation of their changes during a course of different temperature treatments, have been determined using a sensitive analytical method based on UHPLC-MS/MS. Under our experimental conditions, four substances of EC character were detected in the tissue of interest in amounts ranging from less than 1 to over 200 pg·g−1 FW: 20-hydroxyecdysone, polypodine B, turkesterone, and isovitexirone. Among them, turkesterone was observed to be the most abundant EC and accumulated mainly in the crowns and leaves of wheat. Importantly, the level of ECs was observed to be dependent on the age of the plants, as well as on growth conditions (especially temperature). Fenarimol, an inhibitor of a cytochrome P450 monooxygenase, was shown to significantly decrease the level of naturally occurring ECs in experimental plants, which may indicate its potential use in studies related to the biosynthesis and physiological function of these substances in plants.


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