Role of cell wall hydrolases on ethylene-induced abscission of Dendrobium inflorescences
Abscission is preceded by the production of an abscission zone or layer at the base of organ. Abscission zone cells are not greatly different anatomically from the surrounding cells, but typically they are smaller and less vacuolated. Anatomical studies reveal almost complete disappearance of the middle lamella and extensive swelling and disorganization of the microfibrils in the primary wall in abscission zone cells. This changes result from the combined activities of several degrading enzymes. Several of these enzymes have been shown to be regulated by ethylene (Sexton and Roberts, 1982).
KeywordsDegrading Enzyme Cellulase Activity Open Flower Middle Lamella Primary Wall
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Abeles FB, Morgan PM, Saltveit ME (1992) Ethylene in Plant Biology. Academic Press, San DiegoGoogle Scholar
Brown KM (1997) Ethylene and abscission. Physiol Plant 100:567-576CrossRefGoogle Scholar
Bunya-atichart K, Ketsa S, Van Doorn WG (2006) High floral bud abscission and lack of open flower abscission in Dendrobium cv Miss Teen: rapid reduction of ethylene sensitivity in the abscission zone. Funct Plant Biol 39:539-546CrossRefGoogle Scholar
Ketsa S, Rungruchkanont K (2006) Effect of inhibitors of auxin and ethylene on abscission development of Dendrobium inflorescences. Published in this pro- ceedingsGoogle Scholar
Sexton R, Roberts JA (1982) Cell biology of abscission. Annu Rev Plant Physiol 33:133-162CrossRefGoogle Scholar