Generally, Asteraceae flowers such as chrysanthemums and gerberas, are low ethylene-sensitive do not exhibit petal wilting abscission. However, previous research found that the of dahlia, an member belonging to tribe Coreopsideae, show abscission layer development in petal-ovary boundaries. In this study, we investigated ethylene sensitivity 17 ornamental species different tribes by measuring d...

This study aims to determine the allelopathic activities of six plants that belong Asteraceae family such as China wedelia (Wedelia chinensis), sunflower (Helianthus annuus), cosmos (Cosmos bipinnatus), marigolds (Tagetes erecta), Mexico (Tithonia diversifolia), and zinnia (Zinnia elegans) by applying their methanolic extracts on barnyardgrass (Echinochloa crus-galli L.) mustard green (Brassica...

Of the 56 species and 43 genera of Asteraceae tested, 9 were highly resistant or immune to Meloidogyne incognita and did not form root galls. Twenty-six species and six cultivars had 25% or fewer roots galled and were considered moderately resistant to M. incognita. Pre-planting Cosmos bipinnatus (F190), Gaillardia pulchella, Tagetes erecta, Tithonia diversifolia, or Zinnia elegans (F645) reduc...

Cytochemical staining methods and immunofluorescence techniques have been used to follow the release of proteins, including the allergen Antigen E, from whole pollen of ragweeds (Ambrosia spp.) and Cosmos bipinnatus (Compositae). These proteins have been detected in 2 sites in the wall: in the inner cellulosic intine layer especially at the germinal apertures, and in the cavea and the cavities ...

The genus Cosmos is native of America and is constituted by 34 species; 28 of them are endemic of Mexico. The cosmos are used as a nematicide, antimalarial, and antioxidative agent. The aim of this study was to estimate the genetic diversity among 7 cosmos species based on random amplified polymorphic DNA (RAPD) and inter-simple sequences repeats (ISSR) markers. With RAPD markers, the obtained ...

In Mexico the distribution and role of Listrus senilis species is poorly known. The objective this paper to offer information about pollination L. senilis on wild cultivated plants genus Dahlia, some biological observation insect in Central Mexico. dahlia considered national flower Mexico, are showy with yellow, orange red flowers; common rocky areas roadsides mountainous I...