This research was carried out in Southeast of Tunisia in 2009 and 2010, in order to study the propagation of six (Ficus carica L.) cultivars by using hardwood cuttings under the field conditions. The effect of the cultivars and the type of buds, shoots age, shoots length, and shoots diameter were recorded. Ten cuttings per cultivar and/or cutting types with three replications were planted in ro...

Withania somnifera (L.) Dunal is high demanding valuable medicinal plants which have pharmaceuticals properties, known for its with anolides. Nodal segment explants of W. somnifera when cultured on MS (Murashige and skoog’s, 1969) medium horizontally containing different concentration(1-3mg/l) of 6-benzylaminopurine (BAP), kinetin (Kn) and thidiazuron (TDZ) produced multiple shoots on both axil...

The mechanisms of root iron uptake and the transcriptional networks that control root-level regulation of iron uptake have been well studied, but the mechanisms by which shoots signal iron status to the roots remain opaque. Here, we characterize an Arabidopsis (Arabidopsis thaliana) double mutant, yellow stripe1-like yellow stripe3-like (ysl1ysl3), which has lost the ability to properly regulat...

Manganese (Mn) is an essential micronutrient for plants playing an important role in many physiological functions. OsNRAMP5 is a major transporter responsible for Mn and cadmium uptake in rice, but whether it is involved in the root-to-shoot translocation and distribution of these metals is unknown. In this work, OsNRAMP5 was found to be highly expressed in hulls. It was also expressed in leave...

To clarify how root-synthesized cytokinins (CKs) are transported to young shoot organs, CK distribution patterns were analysed in free-CK-responsive ARR5::GUS transformants of Arabidopsis thaliana (L.) Heynh. together with free plus bound CKs using specific CK monoclonal antibodies. Plants were subjected to two different growth conditions, completely protected from any air movement, or exposed ...

In the present investigation, the influence of different forms of cytokinins, auxins and polyamines were tested for mass multiplication and regeneration of cotton. Initially, for the identification of effective concentration for multiple shoot induction, various concentrations of BAP, Kin and 2iP along with IAA and NAA were tested. Among tested concentrations, media fortified with MS salts; B5 ...

1. Asparagus racemosus is an herb used as a rasayana in Ayurveda. The root of A racemosus is popular for its various medicinal uses such as appetizer, stomachic, tonic aphrodisiac galactogogus etc. In this experiment we have found the shoot induction after 3 weeks when Nodal explants segments were cultured in basal medium supplemented with BAP, Kin and Ads and Shoots induction on MS basal mediu...

This communication describes the distribution of gibberellins (GAs) in roots and shoots of spinach in relation to photoperiod. From previous work (Metzger, Zeevaart 1980 Plant Physiol 65: 623-626) shoots were known to contain GA(53), GA(44), GA(19), GA(17), GA(20), and GA(29). We now show by combined gas chromatography-mass spectrometry that roots contain GA(44), GA(19), and GA(29). Trace amoun...

Symbiotic nitrogen fixation is a process of considerable economic, ecological and scientific interest. The central enzyme nitrogenase reduces H(+) alongside N2 , and the evolving H2 allows a continuous and non-invasive in vivo measurement of nitrogenase activity. The objective of this study was to show that an elaborated set-up providing such measurements for periods as long as several weeks wi...