Rosa hybrida Rh ERF 1 and Rh ERF 4 mediate ethylene‐ and auxin‐regulated petal abscission by influencing pectin degradation

Rh-PIP2;1, a rose aquaporin gene, is involved in ethylene-regulated petal expansion.

Aquaporins are water channel proteins that facilitate the passage of water through biological membranes and play a crucial role in plant growth. We showed that ethylene treatment significantly reduced petal size, inhibited expansion of petal abaxial subepidermal cells, and decreased petal water content in rose (Rosa hybrida 'Samantha'). Here, we report the isolation of a plasma membrane aquapor...

Differential expression of several xyloglucan endotransglucosylase/hydrolase genes regulates flower opening and petal abscission in roses

Flower opening is a process that requires movement of petals from a closed position to a horizontal open position, while petal abscission requires cell-wall disassembly. Both processes are controlled by ethylene and require cell-wall modification at the junction (abscission zone) of the petal and thalamus to facilitate the movement or separation of petals. In the present study, a family of xylo...

Role of Ethylene and 1-MCP in Flower Development and Petal Abscission in Zonal Geraniums

Geraniums are sensitive to ethylene during shipping and respond by abscising their petals. Treatment of stock plants with ethylene (ethephon) in order to increase cutting yield resulted in earlier flowering in Pelargonium × hortorum ‘Kim’ and ‘Veronica’, but did not result in increased susceptibility to petal abscission following exposure to 1.0 μL·L–1 ethylene. Treatment of ‘Kim’, ‘Veronica’, ...

Further factors influencing Rh-immunization: II.

Plant Ap2/erf Transcription Factors

Saleh A. and M. Pagés (2003): Plant AP2/ERF transcription factors. – Genetika, Vol. 35, No. 1, 37-50. Transcription factors (TFs) play important roles in plant development and its response to the biotic and abiotic stresses. AP2/ERF transcription factors family is unique to plants and a conserved AP2/ERF domain of about 60 amino acids characterized these transcription factors. AP2/ERF genes hav...