Sex as a response to oxidative stress: stress genes co-opted for sex

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Sex as a response to oxidative stress: stress genes co-opted for sex.

Despite a great deal of interest, the evolutionary origins and roles of sex remain unclear. Recently, we showed that in the multicellular green alga, Volvox carteri, sex is a response to increased levels of reactive oxygen species (ROS), which could be indicative of the ancestral role of sex as an adaptive response to stress-induced ROS. To provide additional support for the suggestion that sex...

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Sex as a response to oxidative stress: a twofold increase in cellular reactive oxygen species activates sex genes.

Organisms are constantly subjected to factors that can alter the cellular redox balance and result in the formation of a series of highly reactive molecules known as reactive oxygen species (ROS). As ROS can be damaging to biological structures, cells evolved a series of mechanisms (e.g. cell-cycle arrest, programmed cell death) to respond to high levels of ROS (i.e. oxidative stress). Recently...

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Sensitivity to Oxidative Stress: Sex Matters

The excessive production of free radicals in organism and the imbalance between the concentration of these and the antioxidant defences has been related to the process of aging. It has been postulated that oxidative processes and antioxidant defence can bee sex related. Besides, we have noticed that at old age 60% of male mice developed hepatocellular tumors which were absent in females. Thus, ...

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Populus is an effective model for genetic studies in trees. The genus Populus includes dioecious species, and the differences exhibited in males and females have been intensively studied. This review focused on the distinctions between male and female poplar and aspen plants under stress conditions, such as drought, salinity, heavy metals, and nutrient deficiency on morphological, physiological...

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ژورنال

عنوان ژورنال: Proceedings of the Royal Society B: Biological Sciences

سال: 2005

ISSN: 0962-8452,1471-2954

DOI: 10.1098/rspb.2005.3151