Root endophytic fungi are essential to the life cycle of orchids. Many them act as growth promoters host plant and mycorrhizal endophytes indispensable seed germination. This study aimed evaluate cultivable fungal richness five native orchids rupestrian grasslands (campos rupestres) in Serra do Cipó, Brazil. Healthy roots were sampled isolated, from which total DNA was extracted Internal Transc...

BACKGROUND Designing functionally efficient recombinant promoters having reduced sequence homology and enhanced promoter activity will be an important step toward successful stacking or pyramiding of genes in a plant cell for developing transgenic plants expressing desired traits(s). Also basic knowledge regarding plant cell specific expression of a transgene under control of a promoter is cruc...

Plant mitochondrial genomes are highly recombinogenic, with a variety of species-specific direct and inverted repeats leading to in vivo accumulation of multiple DNA forms. In maize, the cox2 gene, which encodes subunit II of cytochrome c oxidase, lies immediately downstream of a 0.7-kilobase direct repeat, which is present in two copies in the 570-kilobase master chromosome. Promoters for cox2...

The growing of Solanum lycopersicum L. "tomato" is affected by salinity, reducing its water consumption, and affecting negatively plant growth development. Therefore, it necessary to seek sustainable cultivation fertilization options, such as the use growth-promoting rhizobacteria. This research aimed determine potential rhizospheric Actinobacteria isolated from Opuntia sp. "prickly pear" tomat...

the present study was carried out to investigate micropropagation possibility and determine the optimal medium composition and plant growth regulators (pgrs) combinations under in vitro conditions. the cotyledon and epicotyl explants obtained from 1 month old in vitro grown seedlings were used in ms medium containing ba (0.1, 0.2, 0.5, 1, 2 and 3 mg-1) and tdz (0.1, 0.2, 0.5, 1, 2 and 3 mg-1) e...