Although plants possess a suite of structural defenses, most studies have focused on trichomes. Trichomes can both pre- and post-ingestive effects been consistently found to reduce herbivory. Along with trichomes, few epicuticular waxes as an important defense; however, manipulated comparisons examining herbivore growth development are limited. In this study, using two Solanum species ( glauces...

The trichomes and chemical composition of three species the genus Salvia wild-grown (Salvia lanigera, spinosa) cultured officinalis) were studied in Anbar governate, components stem leaves by Gas chromatography–mass spectrometry(GC-MS), addition to studying epidermis (upper lower epidermis) Light microscope. Important differences appeared us study, where it was found that some compounds without...

Whether we live in a sprawling metropolis or on rural farm, plants and insects are part of our daily lives, many them cannot exist without the other. Insects help reproduce via pollination, provide with food shelter. However, also require nutrition to grow, develop, reproduce; plant-eating can damage them. Over millions years living together, have evolved multiple defense strategies defend them...

A recent publication by Schellmann et al. (2002) in The EMBO Journal has provided important insights into the control of cell fate and pattern formation in plants. To study the underlying molecular mechanisms, the authors made use of the development of root hairs and trichomes in Arabidopsis thaliana. A. thaliana trichomes are large, unicellular structures that project out from the shoot epider...

Trichogonia cinerea is endemic to Brazil and occurs in areas of cerrado and campo rupestre. In this study, we characterized the glandular and non-glandular trichomes on the aerial parts of this species, determined the principal events in the development of the former, and identified the main constituents of the volatile oil produced in its aerial organs. Fully expanded leaves, internodes, flore...

Trichomes, or leaf hairs, are epidermal extensions that take a variety of forms and perform many functions in plants, including herbivore defence. In this study, I document genetically determined variation, within-generation plasticity, and a direct role of trichomes in herbivore defence for Mimulus guttatus. After establishing the relationship between trichomes and herbivory, I test for transg...

Trichomes are differentiated epidermal cells on above ground organs of nearly all land plants. They play important protective roles as structural defenses upon biotic attacks such as herbivory, oviposition and fungal infections, and against abiotic stressors such as drought, heat, freezing, excess of light, and UV radiation. The pattern and density of trichomes is highly variable within natural...

Type A glandular trichomes of the wild potato (Solanum berthaultii Hawkes) entrap insects by rapidly polymerizing the trichome contents after breakage by insect contact. Polymerization of trichome exudate appears to be driven by a soluble polyphenol oxidase (PPO). PPO constitutes up to 70% of the protein in individually collected trichomes and reaches a concentration approaching 200 mum in thes...