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Shiow Y. Wang and Miklos Faust

Abbreviations: ACC, 1-aminocyclopropane-l-carboxylic acid; AdoMet, S-adenosylmethionine; DTE, dithioerythritol; EFE, ethylene-forming enzyme; FID-GC, flame ionization detector-gas chromatography; MACC, l-(malonylamino) cyclopropane-1-carboxylic acid

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Steven T. McNamara and Cary A. Mitchell

Tomato accessions PI 128644 (Lycopersicon peruvianum var. dentatum Mill.) and PI 406966 (Lycopersicon esculentum Mill.) were identified in preliminary screening trials as being relatively nonresistant and resistant to 120 hr of flooding, respectively. Many adventitious roots (AR) developed on the lower stems of flooded PI 406966 seedlings, while few formed on flooded PI 128644 plants. Root formation by flooded PI 406966 seedlings depended on de novo initiation rather than emergence of preformed initials. Hypocotyl porosity of PI 406966 plants increased from between 3% and 6% to 8% by 36 and 72 hr of flooding, respectively. Porosity of PI 128644 hypocotyls was unchanged by 72 hr of inundation. Flooding did not affect the secondary root porosity of either accession. The limited capacity of PI 128644 seedlings to develop AR and aerenchyma was not related to an inability to synthesize 1-aminocyclopropane-l.carboxylic acid or ethylene in response to hypoxia. Chemical name used: 1-aminocyclopropane-1-carboxylic acid (ACC).

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Edna Pesis and Rosa Marinansky

Application of acetaldehyde (AA) at 90 to 360 mm to intact grape berries (Vitis vinifera L. cv. Sultanina and Vitis vinifera L. cv. 103) caused an increase in CO2 production rate and a reduction in ethylene evolution rate. The increase in CO2 production rate was accompanied by a decrease in juice acidity without any change in the total soluble solids content. Addition of ACC to berry halves dramatically increased ethylene production, which was inhibited by AA. Ethanol, applied at the same concentrations as AA, neither caused a reduction in ethylene evolution nor inhibited the conversion of ACC to ethylene. Chemical name used: 1-aminocyclopropane-1-carboxylic acid (ACC).

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Akihiro Itai and Naoko Fujita

, K. Tamura, F. Uchiyama, M. Tomomitsu, M. Shiraiwa, N. 1999 Identification of 1-aminocyclopropane-l-carboxylic acid synthase genes controlling the ethylene level of ripening fruit in Japanese pear ( Pyrus

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Akihiro Itai, Takaaki Igori, Naoko Fujita, Mayumi Egusa, Motoichiro Kodama and Hideki Murayama

: Kole, C.R. (ed.). Genome mapping and molecular breeding in plants. Vol. 4. Fruits and nuts. Springer, Heidelberg, Germany. Itai, A. Kawata, T. Tanabe, K. Tamura, F. Uchiyama, M. Tomomitsu, M. Shiraiwa, N. 1999 Identification of 1-aminocyclopropane-l-carboxylic

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Karen Inge Theron, Human Steenkamp and Willem Jacobus Steyn

-induced ethylene. Effects of indole-3-acetic acid, benzyladenine and abscisic acid on endogenous levels of 1-aminocyclopropane-l-carboxylic acid (ACC) and ACC synthase Plant Cell Physiol. 22 3 369 379 Zieslin, N. Gottesman, V. 1983 Involvement of ethylene in the

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Kang-Di Hu, Xiao-Yue Zhang, Sha-Sha Wang, Jun Tang, Feng Yang, Zhong-Qin Huang, Jing-Yu Deng, Si-Yuan Liu, Shang-Jun Zhao, Lan-Ying Hu, Gai-Fang Yao and Hua Zhang

storage. Literature Cited Abeles, F.B. Biles, C.L. 1991 Cellulase activity in developing apple fruits Scientia Hort. 47 77 87 Adams, D.O. Yang, S.F. 1979 Ethylene biosynthesis: Identification of 1-aminocyclopropane-l-carboxylic acid as an intermediate in