Hormones213-page17

Hormones213-page17 - facilitate harvest and shipping of...

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Plant Growth Regulators - 17 Ethylene activates ripening in fruits by signaling chemical reactions that degrade the pectins of the middle lamella, softening fruit, and promoting the conversion of stored starches and/or oils into sugars that attract seed dispersers. Some fruit ripening involves a significant increase in the rate of cell respiration with concurrent high O 2 uptake. This function of ethylene (fruit ripening) has extensive agricultural impact. Biotechnology has been used to alter sensitivity to ethylene in some crops to
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Unformatted text preview: facilitate harvest and shipping of fruits. Using gene technology, tomatoes lacking ethylene receptor genes have fruits with a shelf life of 100 days! Ethylene promoting ripening Tomatoes on left lack ethylene receptor genes Ethylene promotes female flower production in some members of the Cucurbitaceae, whereas high gibberellins may promote formation of male flowers. Ethylene is also responsible for the hypocotyl arch or apical hook common eudicot shoot germination....
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This note was uploaded on 01/08/2012 for the course BIO 213 taught by Professor Makina during the Fall '09 term at SUNY Stony Brook.

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