Physiology

Gulp: Adventures on the Alimentary Canal by Mary Roach

By Mary Roach

The bestselling, acclaimed writer of Stiff takes at the curious, hilarious intersection of enjoyment and disgust that's digestion

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2009). Plants cannot escape from the unfavorable conditions, and their life is highly dependent on environment. They developed numerous sophisticated mechanisms to protect themselves from unfriendly surroundings. D. Kreslavski et al. tion of plants is very complex and difficult to study. For example, the routine generation of site-directed mutations in plant genome is either impossible or problematic. Thus, the studies of the molecular mechanisms of responses to stresses and identification of stress sensors in plants are still complicated.

However, the mechanisms for sensing environmental stimuli and transducing signals between organs and cells require further elucidation. Since the various mechanisms and adaptive responses of plant to biotic and abiotic stresses are multigenic traits, further efforts are necessary to comprehend the gene expression for groups of functionally related genes; it is important to gather information on what are the ‘useful genes’ responsible for better stress tolerance (Grover et al. 1998). Further insights are also expected from genetic engineering technologies in order to improve stress tolerance in crops.

2010). However, the molecular mechanisms that control perception and transmission of these signals are still not fully understood. It remains unclear how do sensory transmembrane proteins recognize a change in membrane fluidity and which protein domains are involved in the perception of signals. The specific sensor proteins perceive changes in environmental temperature, salinity, acidity, osmolarity, etc. They send a signal about these changes to another molecule, which acts as a signal transmitter.

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