#PlantScienceClassics #18: Ethylene triple response mutants. 35 years ago Anthony Bleecker et al. exploited the triple response phenotype to identify the #ethylene receptor ETR1 @science.org. The ethylene story is another example for #PlantBlindness at the Nobel Prize. doi.org/10.1126/scie... - ThreadSky

somssich.bsky.social • 41 days ago

#PlantScienceClassics #18: Ethylene triple response mutants. 35 years ago Anthony Bleecker et al. exploited the triple response phenotype to identify the #ethylene receptor ETR1 @science.org. The ethylene story is another example for #PlantBlindness at the Nobel Prize.
https://doi.org/10.1126/science.241.4869.1086

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somssich.bsky.social•41 days ago

Ethylene is a gaseous #Phytohormone with a wide range of roles from #PlantDevelopment to #PlantImmunity. Ernest Starling in 1905 defined a hormone as mobile chemical messenger synthesized by a multicellular organism, that has physiological activity distant from the site of synthesis.

somssich.bsky.social•41 days ago

The effect of ethylene on plants was first noted in the 1900s, when it leaked from street lamp illumination gas and affected plants nearby. But it was Dimitry Neljubow, who in a series of experiments identified ethlyene as the active substance in the gas in 1905.

somssich.bsky.social•41 days ago

Neljubow already used the #TripleResponse. He noted pea seedlings growing shorter, thicker epicotyls which bent horizontally, when grown with light from illumination gas, but not outdoors or in the dark. He then tested all components distilled from the gas & identified ethylene as the active bit.

somssich.bsky.social•41 days ago

This work by Neljubow showed that the gaseous ethylene could induce physiological effects. Part 1 of Starlings definition of a hormone. Now, part 2 was missing: That ethylene is actually produced by the organisms in which it functions, and not just from street lamp gas.

somssich.bsky.social•41 days ago

Scientists had long noticed that some fruit affect other plants around them in the same way as ethylene. For example, apples could affect the sprouting of potato tubers – just like ethylene treatment. It was therefore speculated that some plants may be able to produce ethylene.

somssich.bsky.social•41 days ago

In 1934, Richard Gane was indeed able to distill ~0.6 g of ethylene from the gas given off by 60 pounds of apples over 4 weeks. So part 2 of the definition of a hormone, "produced by the organism itself", also seemed to apply in the case of ethylene.

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