Marigold (Calendula officinalis) yield as affected by lamb's-quarters (Chenopodium album) competition
To study interferential effect of lamb's-quarters (Chenopodium album L.) on marigold (Calendula officinalis) yield and lamb's-quarters seed production two factorial field experiments were conducted in Tabriz, Iran, during 2010-2011. Treatments were densities of lamb's-quarters (0, 2, 4, 6 and 8 plants per meter row) and relative times of its emergence (0, 10, 20, 30 and 40 days after marigold emergence). Marigold could tolerate4 lamb's-quarters plants per meter row without any significant yield reduction, when it emerges 40 days after that of marigold. A suitable fit to model of Cousens et al. was obtained for all marigold flower yield data sets at interference with lamb's-quarters. Results also indicate that controlling lamb's-quarters early in the season may reduce its seed production capacity.
Although leaf expansion is obviously a fundamental process in the development of plants, its physiological mechanism is little understood, and has been but sparingly investigated. It is known that auxins affect the elongation of the leaf veins (1) but do not seem to influence the expansion of the laminar leaf tissues. BONNER et al. (3) observed an increase in expansion of radish leaf disks floa...متن کامل
Isorhamnetin and Quercetin Derivatives as Anti-Acetylcholinesterase Principles of Marigold (Calendula officinalis) Flowers and Preparations
Marigold (Calendula officinalis L.) is one of the most common and widespread plants used medicinally all over the world. The present study aimed to evaluate the anti-acetylcholinesterase activity of marigold flowers, detect the compounds responsible and perform chemical analysis of marigold commercial products. Analysis of 23 varieties of C. officinalis flowers introduced into Siberia allowed u...متن کامل
Calendula ,native to southwestern Asia, western Europe, Macaronesia, and the Mediterranean, is an annual and perennial herbaceous plants belongs to family Asteraceae . The aim of this study is to overview its pharmacological effects. This review article was carried out by searching studies in PubMed, Medline, Web of Science, and IranMedex databases up to 2016.totally, of 119 found articles, 40 ...متن کامل
Effect of biostimulant application on production and flavonoid content of marigold (Calendula officinalis L.)
Utilização de bioestimulante para incremento da produção e do teor de flavonoides em calêndula (Calendula officinalis L.) A produção de plantas medicinais como matéria-prima para a indústria deve associar aqualidade à formação de massa e, para tanto, o emprego de reguladores vegetais tem sido estudado nestas culturas. O objetivo deste trabalho foi avaliar o efeito de bioestimulante no crescimen...متن کامل
-T~~ intensity of intraspecific competition under different levels of light and nitrogen supply was assessed for the temperate zone herb, Chenopodium album. Plants were grown at two densities (one or six plants/pot) in a modified factorial design with three levels each of light and nitrogen availability. This yielded five light/nitrogen treatments which comprised two gradients, one extending fr...متن کامل
In order to study the effect of foliar applications of micronutrients on yield, extraction oil production and chemical composition of pot marigold (Calendula officinalis), two experiments were conducted in the randomized complete block design with three replications in Shahrekord, Iran during two growing seasons 2014 and 2015. The objectives of this study were to determine the effects of foliar...متن کامل
دوره 7 شماره 4
صفحات 659- 664
تاریخ انتشار 2013-09-01
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