Abstract Background Mutation breeding is an extraordinary tool in plant to increase the genetic variability, where mutations anthocyanin biosynthesis are targets generate distinctive phenotypes ornamental species. In poinsettia, ionizing radiation routinely applied programs obtaining a range of colours, with nearly all pink and white varieties being obtained after γ- or X-ray mutagenesis red va...

BACKGROUND AND AIMS Elucidation of the mechanisms by which plants adapt to elevated CO2 is needed; however, most studies of the mechanisms investigated the response of plants adapted to current atmospheric CO2. The rapid respiration rate of cotton (Gossypium hirsutum) fruits (bolls) produces a concentrated CO2 microenvironment around the bolls and bracts. It has been observed that the intercell...

Genetic mutants are useful tools for basic and applied research to elucidate the developmental and regulatory processes of the cotton plant (Gossypium hirsutum L.). Their value is enhanced with knowledge of their location in the genome. The results of aneuploid tests used to locate mutant loci on specific chromosomes in G. hirsutum L. are reported. Thirty-four monosomes and telosomes, represent...

BACKGROUND AND AIMS In the Lamiales, indeterminate thyrses (made up of axillary cymes) represent a significant inflorescence type. However, it has been largely overlooked that there occur two types of cymes: (1) ordinary cymes, and (2) 'pair-flowered cymes' (PFCs), with a flower pair (terminal and front flower) topping each cyme unit. PFCs are unique to the Lamiales and their distribution, orig...

Regulating the transition of meristem identity is a critical step in reproductive development. After the shoot apical meristem (SAM) acquires inflorescence meristem identity, it goes through a sequential transition to second- and higher-order meristems that can eventually give rise to floral organs. Despite ample information on the molecular mechanisms that control the transition from SAM to in...

Poinsettia is an economically important ornamental potted plant in which certain bract colour variants are often obtained by mutation breeding. Previously, poinsettia, we identified Bract1, a GST gene involved the sequestration and transport of anthocyanins to vacuole. This carries short, highly mutable 4-bp repeat its coding region. Loss one unit leads loss function for homozygous mutants, ant...