Leaf senescence is a programmed event where resources are mobilised from older tissues to the meristematic regions of the plant. In white clover (Trifolium repens L.), leaf and stolon senescence have an important impact on the persistence of the legume in pasture. As part of our investigation of leaf senescence, we have evidence for a central role for the plant hormone ethylene and have identif...

Numerous signal molecules move through the phloem to regulate development, including proteins, secondary metabolites, small RNAs and full-length transcripts. Several full-length mRNAs have been identified that move long distances in a shootward or rootward direction through the plant vasculature to modulate both floral and vegetative processes of growth. Here we discuss two recently discovered ...

aeroponic is a new technology for potato minituber production. in order to recognition of the suitable nutrient solution and potato variety for minituber production in aeroponics in comparison with classic hydroponics, a factorial experiment was carried out with three factors of culture systems (aeroponics and hydroponics), nutrient solutions (chang et al., 2008; apcoab and commercial nutrient ...

Caulerva racemosa seaweed is a superior commodity with both ecological and socio-economical benefits. It technologically developed into different products which include antioxidants, antibiotics, medicinal ingredients, cosmetics as well other organic also used conventionally food ingredients for human’s consumption. Meanwhile, the presence of C. observed to decrease exploitation rate one factor...

Launaea sarmentosa (Willd.) Kuntze., an edible perennial herb, is critically considered endangered species due to its habitat destruction. In vitro L. propagation was therefore conducted preserve this plant. Two types of explants including leaf and stolon were applied induce the multiple shoots by culturing on Murashige Skoog (MS) medium supplemented with BA (0, 1, 2 mg/L) 2,4-D 2, 4 mg/L). The...

White clover (Trifolium repens L.), an economically important forage legume in temperate pastures, provides quality herbage and plant-available nitrogen. Enhancing breeding efforts to improve dry matter (DM) yield vegetative persistence will increase on-farm value of this forage. To genetic gain for such traits, tools like genomic selection have proven be highly valuable other crops. However, i...

The retinoids (retinol, retinal, retinoic acid) cause alterations in the pattern of limb elements in vertebrates (Summerbell & Harvey, 1983). As shown here, retinoids also influence pattern specification in hydroid polyps (Hydractinia echinata) in a way suggesting interference with the generation and transmission of signals responsible for the dimension and spacing of structures. A pulse-type a...

The early embryonic development of Hydractinia lasts about 2.5 days until the developing planula larva acquires competence for metamorphosis. Most embryonic cells stop cycling on reaching the larval stage. In older larvae of Hydractinia, cells that are still proliferating occur exclusively in the endoderm in a typical distribution along the longitudinal axis. During metamorphosis, proliferation...

Using the yeast (Saccharomyces cerevisiae) two-hybrid system and a potato (Solanum tuberosum) KNOX protein, designated POTH1, as bait, we have identified seven distinct interacting proteins from a stolon library of potato. All seven cDNAs are members of the BEL1-like family of transcription factors. Among these proteins, there are at least four regions of high sequence conservation including th...