Our previous findings showed that the expression of the Rosa hybrida vacuolar invertase 1 gene (RhVI1) was tightly correlated with the ability of buds to grow out and was under sugar, gibberellin and light control. Here, we aimed to provide an insight into the mechanistic basis of this regulation. In situ hybridization showed that RhVI1 expression was localized in epidermal cells of young leave...

Legume plants are capable of entering into a symbiotic relationship with rhizobia bacteria. This results in the formation of novel organs on their roots, called nodules, in which the bacteria capture atmospheric nitrogen and provide it as ammonium to the host plant. Complex molecular and physiological changes are involved in the formation and establishment of such nodules. Several phytohormones...

The use of nondwarf rice (Oryza sativa L.) cultivars treated with uniconazole as test plants for gibberellin (GA) bioassay instead of Tan-ginbozu dwarf rice variant was investigated. The sensitivity of six nondwarf rice cultivars to GAs was increased substantially by treatment of the seeds with uniconazole. The minimum detectable dose of a GA in the nondwarf cultivars treated with uniconazole w...

Methylation, the attachment of a methyl group in place of a hydrogen atom, is a common modification to numerous biological substrates. Almost all classes of plant metabolite are known to be methylated, including amino acids, alkaloids, phenylpropanoids, sugars, sterols, thiols, flavonoids, and purines (D’Auria et al., 2003). Methylation affects structural characteristics of these metabolites th...

Plant trichomes are specialized epidermal protrusions that, depending on species, are located on the surfaces of leaves, stems, petioles, sepals, seed coats, and other aerial organs. Trichomes not only defend plants against biotic and environmental hazard, but also are able to synthesize, store, and secrete a large number of specialized (secondary) metabolites, including those with significant ...

The Arabidopsis basic helix-loop-helix (bHLH) proteins INDEHISCENT (IND) and ALCATRAZ (ALC) specify tissues required for fruit opening that have major roles in seed dispersal and plant domestication. Here, we show that synthesis of the phytohormone gibberellin is a direct and necessary target of IND, and that ALC interacts directly with DELLA repressors, which antagonize ALC function but are de...

Plant trichomes are specialized epidermal protrusions that, depending on species, are located on the surfaces of leaves, stems, petioles, sepals, seed coats, and other aerial organs. Trichomes not only defend plants against biotic and environmental hazard, but also are able to synthesize, store, and secrete a large number of specialized (secondary) metabolites, including those with significant ...