Shoot tips from 4to 6-week-old in vitro grown plantlets of six different cultivars of papaya were cryopreserved by vitrification. Shoot tips were treated in a 2 ml cryo-tube filled with a solution of 2 M glycerol and 0.4 M sucrose at 25°C for 20 min, then dehydrated with 1 ml pre-cooled vitrification solution at 4°C for 60 min. Treated samples were kept in liquid nitrogen for at least one week....

An experiment was carried out to know the effect of shoot clipping on floral morphology and seed yield in two Indigofera spp. viz. I. tinctoria L. and I. suffruticosa Mill. All parts of shoot including the main stem were clipped at 60 cm height from the base at 120 days after sowing (DAS). At 120 DAS, I. tinctoria already exhibited 1 flowering while I. suffruticosa showed no flowering. Shoot cl...

The aim of this work was to develop protocols for micropropagation of selected Rubus cultivars – ‘Tulameen’ and ‘Black Jewel’ (Rubus idaeus L.), ‘Black Satin’ (Rubus fruticosus L.) and ‘Tayberry’ (Rubus fruticosus x Rubus idaeus). Nodal segments carrying dormant buds were used for in vitro culture establishment. For shoot initiation, MS medium containing 8 g*L phytoagar, 30 g*L sucrose, 1 mg*L ...

Shoot tips of two fig cultivars (Conadria and Black Mission) proliferated in vitro, were cultured on modified MS medium supplemented with 0.5 mg/l 6-benzylaminopurine (BAP). The present investigation aimed to investigate the effect of different medium salt strengths (Double, full, half and quarter) and different sources of carbon (sucrose and fructose) at different concentrations (0.1 and 0.2 m...

Plants can regenerate from a variety of tissues on culturing in appropriate media. However, the metabolic shifts involved in callus formation and shoot regeneration are largely unknown. The metabolic profiles of callus generated from tomato (Solanum lycopersicum) cotyledons and that of shoot regenerated from callus were compared with the pct1-2 mutant that exhibits enhanced polar auxin transpor...

We investigated the effect of Si concentration on shoot regeneration and salinity tolerance of Ajuga multiflora. Addition of Si to the shoot induction medium significantly increased the frequency of shoot induction. The average number of shoots regenerated per explant decreased on the medium containing NaCl alone, while there was less decrease when the shoot induction medium was supplemented wi...

Salinity tolerance is correlated with shoot chloride (Cl(-)) exclusion in multiple crops, but the molecular mechanisms of long-distance Cl(-) transport are poorly defined. Here, we characterize the in planta role of AtSLAH1 (a homologue of the slow type anion channel-associated 1 (SLAC1)). This protein, localized to the plasma membrane of root stelar cells, has its expression reduced by salt or...

Plants coordinate their development using long-distance signaling. The vascular system provides a route for long-distance movement, and specifically the xylem for root-to-shoot signaling. Root-to-shoot signals play roles communicating soil conditions, and these signals are important for agricultural water conservation. Using genetic approaches, the Arabidopsis bypass1 (bps1) mutant, which over-...

Biosynthesis of the gibberellin precursor ent-kaurene-(14)C from mevalonic acid-2-(14)C was assayed in cell-free extracts of shoot tips of etiolated and light-grown Alaska (normal) and Progress No. 9 (dwarf) peas (Pisum sativum L.). During ontogeny of light-grown Alaska peas, kaurene-synthesizing activity increased from an undectectable level in 3-day-old epicotyls to a maximum in shoot tips of...

A protocol for direct shoot regeneration without intervening callus phase was developed by shoot tip culture of MS (murashinge and skoog) medium for teak. The study reveal that aseptically inoculated shoot tip of teak in established shoot induction and shoot multiplication was also observed at same concentration .At BAP 1mg/l, IAA 1mg/l and kin 1mg/l the shoots were weak ,tiny and non separable...