Other Regulatory Patterns

Not all ethylene-sensitive flowers are climacteric and produce elevated levels of ethylene during senescence. For example, the daffodil flower is ethylene-sensitive, non-climacteric, and produces only minimal amounts of ethylene throughout its maturation and senescence. Furthermore, repeated treatments of the flower with 1-MCP result in only a very modest increase in longevity which suggests that ethylene is not the primary regulator of its senescence. It appears therefore, that the absence of climacteric ethylene production or respiration is no signature for ethylene insensitivity or vice versa. It seems likely that the relationships among flower senescence, respiration, ethylene production and ethylene sensitivity need to be defined for each new species studied.

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How to Stay Young

How to Stay Young

For centuries, ever since the legendary Ponce de Leon went searching for the elusive Fountain of Youth, people have been looking for ways to slow down the aging process. Medical science has made great strides in keeping people alive longer by preventing and curing disease, and helping people to live healthier lives. Average life expectancy keeps increasing, and most of us can look forward to the chance to live much longer lives than our ancestors.

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