The cactus Mammillaria gracillis Pfeiff. was propagated in vitro on Murashige and Skoog (MS) medium without any growth regulators. At the bases of some plants abundant callus masses developed. Lower agar and higher MS salt concentrations stimulated callus pro­ duction. In the culture, morphologically normal and hyperhydric shoots were regenerated. The growth of crown-gall tumour was induced on ...

background and objectives:  haplophyllum canaliculatum isan endemicand endangerediranian plant from rutaceae family. the object of this work was to study the volatile production in established shoot and callus cultures of haplophyllum canaliculatum as well as isolation, identification and sequencing of 18s rrna gene from callus culture. methods: shoot and callus cultures of h. canaliculatum wer...

Hypericum perforatum L. (St. Johns’ wort) is the most commercially important species of the genus Hypericum and contains a wide range of components including naphthodianthrones, phloroglucinols, tannins, xanthones, phenolic acids and essential oil. In order to establish an efficient protocol for regeneration, the effects of explant type and plant growth regulators on direct and indirect shoot r...

In plants, multiple detached tissues are capable of forming a pluripotent cell mass, termed callus, when cultured on media containing appropriate plant hormones. Recent studies demonstrated that callus resembles the root-tip meristem, even if it is derived from aerial organs. This finding improves our understanding of the regeneration process of plant cells; however, the molecular mechanism tha...

Highly efficient in vitro regeneration system has been developed for Swertia lawii Burkill, an important herb used as substitute for Swertia chirayita. Shoot tips explants were cultured on MS medium with various phytohormones for multiple shoot production. The best shoot production frequency (100%) and maximum shoots (10.4 ± 0.8) were obtained on MS media containing TDZ (3.0 mg l-1) in combinat...

Brinjal (Solanum melongena L.) var. Mattu Gulla (MG) and var. Perampalli Gulla (PG) are unique varieties with distinct flavour cultivated in Udupi, Karnataka State, and are exposed to several biotic and abiotic stresses. An efficient and reproducible in vitro regeneration method is required to expedite the manipulation of these brinjal varieties to cope up with stress by tissue culture and gene...

The case here recorded was first described (Hilton 1934) under the title “ Familial Chondrodystrophy with Rheostosis Treated by X-ray Therapy. ‘ ‘ It is thought appropriate, in giving this up-to-date further account of the progress of the case, to substitute the description ‘ ‘ hyperplastic callus, ‘ ‘ because the main features of the present case conform with those observed in hyperplastic cal...

The volatile shoot oil o f Coleonema album was found to be composed o f monoterpenes, ses­ quiterpenes and phenylpropanoids. Heterotrophic and photomixotrophic callus cultures were established from green parts o f the plant. A photomixotrophic cell line contained a heteroge­ neous population o f plastids and synthesized an essential oil, which differed qualitatively and quantitatively from the ...

Momordica dioica Roxb. (Spine Gourd) (Cucurbitaceae) is an important vegetable with high food and medicinal value. Maintaining tuber quality in field conditions as well its conservation during storage is difficult. Micropropagation may help to overcome these problems to a great extent. As there is limited information on the above mentioned aspects is not available. Therefore, the present study ...

Shoot regeneration in calli derived from immature barley embryos is regulated by light conditions during the callus-induction period. Barley cultivars Kanto Nijo-5 (KN5) and K-3 (K3) showed lower efficiency of shoot regeneration in a 16-h photoperiod during callus-induction than those in continuous darkness, whereas shoot regeneration was enhanced in cultures under a 16-h photoperiod in Golden ...