linkedin post 2020-09-05 05:25:54

Uncategorized
DEVELOPMENTAL CHANGES. “During floral development, symmetry may change: monosymmetric flowers may have a polysymmetric early phase; polysymmetric flowers may have a monosymmetric or even asymmetric early phase; more than one symmetry change is also possible.“ https://lnkd.in/dVQT3m7 View in LinkedIn
Read More

linkedin post 2020-09-05 05:22:37

Uncategorized
FRAGMENT FROM NATURE continues from last weekend and concludes this weekend on the theme of floral symmetry. The genetics behind this symmetry have been thoroughly investigated, and are surprisingly simple, given the complex varieties of floral morphology. Flowers are designed for reproduction; 87% of plants are pollinated by animals, insects and birds, and and symmetry functions primarily to attract and to accurately guide plant pollinators to the structures that will make the next generation of plants. For this reason, symmetry is critical for the species. https://lnkd.in/dJGh9CE View in LinkedIn
Read More

linkedin post 2020-09-05 05:37:40

Uncategorized
RADIAL TO BILATERAL SHIFT. "The current model, mostly derived from A. majus, involves sequential steps leading to a shift from radial to bilateral symmetry in the petal whorl: (1) CYC2-like genes are dorsally restricted; (2) CYC2-like genes up-regulate RADIALIS (RAD) in the dorsal region; (3) RAD negatively regulates weakly ubiquitous DIVARICATA (DIV), leaving DIV to localize in the outer epidermis of only the ventral region; and (4) DIV possibly up-regulates AmMYBML1, which functions in forming trichomes, conical cells, and the hinge of the ventral petal." http://onlinelibrary.wiley.com/doi/10.1111/nph.13198/full View in LinkedIn
Read More

linkedin post 2020-09-05 05:36:32

Uncategorized
MODULAR SYMMETRY GENES. "Studies in model systems can start to piece together a modular GRN that underlies floral symmetry and to investigate how the dynamics of this network can lead to different symmetry." patterns." (GRN = gene regulatory networks). http://onlinelibrary.wiley.com/doi/10.1111/nph.13198/full View in LinkedIn
Read More

linkedin post 2020-09-07 04:31:19

Uncategorized
PLANT ACTION POTENTIALS. "The majority of cells in different plant species are electrically active and excitable, being able to release and propagate action potentials (APs). These electrical signals even influence principal physiological processes such as photosynthesis and respiration." https://lnkd.in/eVTKbBi View in LinkedIn
Read More

linkedin post 2020-09-07 04:29:19

Uncategorized
"ELECTRICAL PHENOMENA in single plant cells are to a great extent very similar to those occurring in animal cells. All plant cells actively maintain an electrical cell membrane potential difference of −30 to −250 mV between the vacuole or cytosol and the external medium." https://lnkd.in/eVTKbBi View in LinkedIn
Read More

linkedin post 2020-09-06 05:43:28

Uncategorized
FLORAL SYMMETRY AND SPECIATION. "Changes in petal symmetry, petal reflection and cell shape can change the size of the visual floral display and colour saturation, creating differences in likely visitation by pollinators, thus effecting speciation via reproductive isolation among individuals with differing patterns of gene expression." http://onlinelibrary.wiley.com/doi/10.1111/nph.13198/full View in LinkedIn
Read More

linkedin post 2020-09-06 05:42:15

Uncategorized
GENE MODULE INTERACTIONS. "Finally, different modules of regulatory networks can interact differently across the tree of life. For example, in Pisum sativum conical cells occur only on petals with CYC2 expression and are lost when CYC2 expression is lost, implying a developmental constraint within this network that could be relaxed in other taxa." http://onlinelibrary.wiley.com/doi/10.1111/nph.13198/full View in LinkedIn
Read More