Effects of Nitrogen and Plant Density on Growth, Yield and Chemical Composition of Two Winter Wheat (Triticum aestivum L.) Cultivars

1990 ◽  
Vol 164 (3) ◽  
pp. 174-183 ◽  
Author(s):  
J. Ellen
Keyword(s):  
Triticum Aestivum ◽  
Chemical Composition ◽  
Winter Wheat ◽  
Plant Density ◽  
Growth Yield ◽  
Triticum Aestivum L

Seed rates for soft white winter wheat in southwestern Ontario

1993 ◽  
Vol 73 (4) ◽  
pp. 1071-1073 ◽  
Author(s):  
A. H. Teich ◽  
A. Smid
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Grain Yield ◽  
Key Words ◽  
Plant Density ◽  
Triticum Aestivum L ◽  
Seed Rate ◽  
Heat Units ◽  
Key Words Wheat ◽  
Obsolete Cultivars

This study was undertaken to determine the optimum seed rate for soft white winter wheat (Triticum aestivum L.) cultivars currently grown in southwestern Ontario (> 2900 corn heat units) where 65% of Ontario’s wheat is grown. The currently recommended density of 240–400 plants m−2 was determined using obsolete cultivars. Two popular cultivars, Harus, which tillers abundantly, and Rebecca, which tillers less, were grown from 100 to 600 seeds m−2 in increments of 100. The optimum seed rate for grain yield was 435 seeds m−2. This rate appears to be suitable for a range of genotypes adapted to southwestern Ontario. There was no interaction for yield among cultivars, years and locations. Yield was not related to tillering capacity, as the lower the plant density the more seeds there were per head. Key words: Wheat (winter), seed rate, tillering

scholarly journals Naturally Occurring Ecdysteroids in Triticum aestivum L. and Evaluation of Fenarimol as a Potential Inhibitor of Their Biosynthesis in Plants

2021 ◽  
Vol 22 (6) ◽  
pp. 2855
Author(s):  
Anna Janeczko ◽  
Jana Oklestkova ◽  
Danuše Tarkowská ◽  
Barbara Drygaś
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Triticum Aestivum L ◽  
Growth Conditions ◽  
Animal Kingdom ◽  
Experimental Conditions ◽  
P450 Monooxygenase ◽  
Naturally Occurring ◽  
Regulatory Effects ◽  
Potential Use

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.

Cirsium arvense (L.) Scop. competition with winter wheat (Triticum aestivum L.)

Weed Research ◽  
1991 ◽  
Vol 31 (6) ◽  
pp. 409-415 ◽  
Author(s):  
B. R. MCLENNAN ◽  
R. ASHFORD ◽  
M. D. DEVINE
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Triticum Aestivum L ◽  
Cirsium Arvense
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