The possible involvement of polyamines in the development of tomato fruits in vitro |
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| Authors: | D C Teitel E Cohen S Arad E Birnbaum Y Mizrahi |
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| Institution: | (1) The Department of Biology, Ben-Gurion University of the Negev, P.O.B. 1025, 84110 Beer-Sheva, Israel;(2) The Institutes for Applied Research, Ben-Gurion University of the Negev, P.O.B. 1025, 84110 Beer-Sheva, Israel;(3) Present address: DOE Plant Research Laboratory, Michigan State University, 48824 East Lansing, MI, USA;(4) The Institutes for Applied Research, Ben-Gurion University of the Negev, P.O.B. 1025, 84110 Beer-Sheva, Israel |
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| Abstract: | The apparent involvement of ornithine decarboxylase (ODC) and putrescine in the early stages of fruit growth in tomato (Lycopersicon esculentum Mill.) has been previously described. Further evidence presented here supports the direct involvement of ODC and putrescine in the cell division process in tomato fruits. In tomato fruits grown in vitro, in which basic growth processes are inhibited, the activity of ODC and arginine decarboxylase (ADC) and the level of free polyamines were reduced. While ODC and ADC activity was correlated with the period of cell division in the tomato fruit, the free polyamine content was correlated with the DNA content, cell size, and fruit fresh weight. The addition of exogenous putrescine, however, did not restore the basic growth processes in the fruits grown in vitro. |
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| Keywords: | Lycopersicon esculentum tomato fruit organ culture polyamines ODC ADC |
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