Structures on the surfaces of leaves, such as dense layers of non-glandular trichomes, strongly affect phylloplane mite activities. On the other hand the feeding of eriophyoid mites on leaf surfaces can cause hyperplasia of leaf trichomes (erinea formation). In many cases the hyperplasia is accompanied by the accumulation of pigments within trichome cells, causing an impressive red-brown colour...

Leaf hairs (trichomes) of Arabidopsis (Arabidopsis thaliana) have been extensively used as a model to address general questions in cell and developmental biology. Here, we lay the foundation for a systems-level understanding of the biology of this model cell type by performing genome-wide gene expression analyses. We have identified 3,231 genes that are up-regulated in mature trichomes relative...

Immature stages of Reduvius personatus (Linnaeus) and some other Reduviidae are known to camouflage themselves with a range of materials found in their environment. Even though this behavior has been observed in several species, camouflaging structures have never been studied in a comparative way. This study documents for the first time the structure that is involved in the application of camou...

Plant hairs (trichomes) including cotton fiber develop from single epidermal cells on the aerial surfaces of plants. Two main types of trichomes, glandular and nonglandular, can be found playing various functions including protection from insect damage. The development of plant trichomes provides an excellent system for studies of cell developmental biology. Because they are easily observable, ...

Plant trichomes come in a variety of shapes, sizes and cellular composition. Some types, commonly called glandular trichomes, produce large amounts of specialized (secondary) metabolites of diverse classes. Trichomes are implicated in a variety of adaptive processes, including defense against herbivores and micro-organisms as well as in ion homeostasis. Because trichomes protrude from the epide...

Tobacco (Nicotiana tabacum) was recently shown to detoxify heavy metals by exudation of metals as a metalsubstituted calcite (calcium carbonate) through leaf trichomes. In this paper, we describe the applications of the variablepressure scanning electron microscopy (VP-SEM) system to investigate tobacco trichomes exudates after heavy metal treatment. An energy-dispersive X-ray analysis (EDX) sy...

Clavicipitaceous fungi producing ergot alkaloids were recently discovered to be epibiotically associated with peltate glandular trichomes of Ipomoea asarifolia and Turbina corymbosa, dicotyledonous plants of the family Convolvulaceae. Mediators of the close association between fungi and trichomes may be sesquiterpenes, main components in the volatile oil of different convolvulaceous plants. Mol...

fourteen accessions and cultivars of lycopersicon spp. were studied to evaluate their resistance to two-spotted spider mite, tetranychus urticae koch, under laboratory and greenhouse conditions. in vitro studies were carried out using thumbtack and leaf disk bioassays. lycopersicon hirsutum and l. pennellii accessions supported more mites on the tack. the highest number of eggs (5.15 â± 0.48 eg...

Cotton fibres are unicellular seed trichomes. Our previous study suggested that the cotton R2R3 MYB transcript factor GaMYB2 is a functional homologue of the Arabidopsis trichome regulator GLABRA1 (GL1). Here, the GaMYB2 promoter activity is reported in cotton (Gossypium hirsutum), tobacco (Nicotiana tabacum), and Arabidopsis plants. A 2062 bp promoter of GaMYB2 was isolated from G. arboreum, a...

(Morphology and histochemistry of glandular trichomes of Cordia verbenacea DC. (Boraginaceae) leaves). The objective of this work was to study, using light and fluorescence microscopy and scanning electron microscopy, the morphology and secretory products of glandular trichomes of Cordia verbenacea DC. (Boraginaceae), known as ‘baleeira’, a species used in folk medicine as anti-inflammatory, an...