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Anonymous09/05/26, 15:09No.17047250Photorespiration-Bypass Synthetic Biology
>"Deer" is a name given to a tree that has been modified to contain a Photorespiration-Bypass Pathway. It is a well-characterized, field-deployed 717 hybrid aspen (Populus tremula × P. alba) carrying a synthetic photorespiration-bypass pathway.
>Rubisco sometimes captures oxygen instead of CO2, producing phosphoglycolate. Trees normally recycle it through photorespiration, a long pathway crossing the chloroplast, peroxisome, and mitochondrion. Deer carries a synthetic bypass that keeps more of this recycling inside the chloroplast, reducing its energetic cost and returning CO2 near Rubisco, where it can be fixed again.
>C4 photosynthesis evolved nearly seventy times, concentrating CO2 around Rubisco and reducing photorespiration. As C4 grasses expanded in the late Miocene, this leaf-level innovation helped transform grasslands, fire regimes, animal communities, and terrestrial carbon cycling across continents.
>Deer derives from INRA 717-1B4, the Populus tremula × P. alba hybrid commonly placed within P. × canescens. P. tremula is the maternal parent, and the tree’s architecture and growth are strongly aspen-like. Its lineage is Eurasian. North American P. tremuloides is a close relative of P. tremula.
>The same photosynthesis-enhancement construct was introduced into P. deltoides through a separate transformation and event-selection program.
>Deer was selected as the lead event after repeated evaluation of growth, biomass, photosynthetic physiology, expression, genetic structure, and propagation performance. Across successive vegetative propagation cycles, it maintained an enhanced growth and biomass phenotype in replicated controlled-environment evaluation, then entered replicated field testing.
>USDA APHIS determined in 2020 that Deer was outside the plant-pest regulatory framework under 7 CFR part 340. Carbocene maintains and propagates the line under a nonprofit research license.
https://carbocene.org/research
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Anon09/06/26, 14:57No.17047902
>producing h2o2 directly in chloroplast
top jej. another "le catalase will solve anything" brainlet approach.
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Anon09/06/26, 16:15No.17047943
I suppose there is a reason why trees don't use this pathway, and there will be a catastrophic drawback somewhere, sometime.
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Anon09/07/26, 05:16No.17048260
>implement a permanent, ecology altering solution to the temporary problem of excess co2 emissions
>trees with more efficient metabolisms outcompete original species and forests slowly transform into monocultures
>monoculture forests drain all of the nutrients from the soil, increase wildfires, and impart unpredictable side-effects on the rest of the ecosphere forever