### organic olefin:

Ethylene
* acts as a negative regulator of the signaling pathway.
* also accerlerates the ripening process.
* also causes ripened fruit to drop from the plant
  - starches to be converted to sugars
  - enters the environment from combustion engine exhaust and non-electric heaters
  - evolves in the ripening plantain
  - induces ripening of many fruits and vegetables
  - is flammable and can be toxic to aquatic wildlife
  - triggers more ripening among other fruits
* burns with a bright flame.
* byproduct of the incomplete combustion of fossil fuels such as natural gas and oil.
* can cause the formation of a bitter compound in carrots and possibly parsnips
  - have a number of deleterious effects on other products
* causes aging in plants and auxin levels stimulate growth
  - changes in dormancy states primarily by breaking dormancy
  - flowers to dry up quickly and go to seed to make more plants
  - leaves and bracts to droop
  - yellowing of leaves, and an increased rate of deterioration
* colorless gas regarded as the natural aging or ripening hormone.
* colorless, odorless gas that promotes ripening in many fruits and vegetables
  - slightly sweet-smelling gas
* common gas in swamps due to decay.
* controls the ripening of fruits.
* dibromide binds to DNA in vitro and in vivo in rodents
  - ingested can cause gastroenteritis, liver necrosis, and renal tubular damage
  - itself very toxic compound
* dibromide, reagent grade.
* differs from other plant hormones in that it a. has only inhibitory effects on plants.
* enhances the antifungal lipids contents idioblasts from avocado mesocarp.
* gas produced by ripe fruits.
* gas that also serves as a plant hormone
  - forms through the breakdown of methionine, which is in all cells
  - which is produced by ripening fruits including avocados, bananas and apples
* gaseous by-product of kerosene combustion, which allows fruit to ripen in sheds.
* glycol also contributes to significant renal tubular necrosis
  - can poison young children if swallowed
* glycol is first ingredient listed on the antifreeze jug
  - odorless but has a sweet taste
  - part of a slurry used for polishing in the manufacture of disk storage devices
  - present in anti-freeze, coolants, hydraulic fluid, and solvents
  - safe and effective as an anti-freeze mixture for automobile radiators
  - or propylene glycol is only the anti-freeze part
* growth-inhibiting gas, the equivalent of a hormone in animals.
* has a very low diffusion rate in water and accumulates in submerged plant parts.
* has many applications, mainly to make different plastics
  - side effects on tree growth too, so use it judiciously
* hormone that causes plants to grow fruits
  - induces flowering and fruit ripening
* induces genes required for ripening.
* inhibits fruit ripening.
* is alkenes.
* is also flammable and toxic
  - responsible for growth inhibition, leaf abscission, and aging
  - an olefin
  - bound by a receptor that is membrane-localized
  - chemical compounds
  - combined with chlorine to make vinyl chloride
  - commerically important in fruit ripening
  - composed of two carbon atoms but only four hydrogen atoms
  - considered to be a plant hormone and a growth regulator
  - detected with a flame ionization detector
  - evolved from plant tissue, particularly injured and old plant tissue
  - gases
  - implicated in plant response to flooding
  - involved in the regulation of many processes in plants
  - known to induce cell death for example in the production of aerenchyma
  - made in the chemical industry by steam cracking
  - most well known for hastening fruit ripening
  - processed into a wide range of petrochemical products from car tyres to plastic bags
  - produce by fruits and vegetables and speeds up ripening
  - produced at a faster rate in rapidly growing and dividing cells, especially in darkness
  - said to function as a hormone in plants, acting to hasten the ripening of fruits
  - sufficient to promote perianth senescence in a number of flowers
* is the first member
  - monomer for polyethylene and styrene for polystyrene
* is used in automotive parts, cosmetics and food additives
  - to ripen crops at the same time
  - usually the primary gas responsible for pollution injury
* makes fruit ripen which inhibits certain plants from maturing fully.
* natural by product of the ripening process to begin with
  - gaseous hormone produced by flowers, fruits, and plants
  - hormone that is an essential part of the ripening process
  - occurring plant hormone that increases during fruit ripening
  - plant growth hormone produced by all fruits and vegetables in natural habitat
* naturally occurring ripening gas.
* negatively regulates local expression of plant defense lectin genes.
* occurs naturally in tomato and many other plants.
* planar molecule.
* plant growth regulator known to alter sex expression in cucumber.
* plant hormone that affects ripening and rotting in plants
  - causes fruit to mature
  - is an implicated regulator of plant growth
  - stress exaggerator
* plays an important role in the growth and development of plants and in flower senescence.
* plays multiple roles in modulating gravitropism in tomato
  - the gravitropic response in tomato
* positive regulator of root hair development in Arabidopsis thaliana.
* potent plant hormone.
* promotes fruit ripening and abscission of leaves, flowers, and fruits
* quickens ripening in fruits that come in contact with it.
* regulates the susceptible response to pathogen infection in tomato.
* ripens fruit and hastens aging in particular parts of the plant.
* then acts as a hormone to regulate the ripening process.
+ Ethylene, How it is made: Hydrocarbons