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Bulletin of Botanical Research ›› 2007, Vol. 27 ›› Issue (2): 175-181.doi: 10.7525/j.issn.1673-5102.2007.02.013

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In Virto Comparision of Ca(NO3)2 Tolerance of Different Tomato Cultivars and Rootstock Selfed Lines at Seedling Stage

LIU Hui-Min;ZHU Yue-Lin*;CHEN Lei   

  1. College of Horticulture, Nanjing Agricultural University, Nanjing 210095
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-03-20 Published:2007-03-20
  • Contact: ZHU Yue-Lin
  • Supported by:

Abstract: In vitro salt tolerance at seedling stage of tomato cultivars were evaluated under a series of Ca(NO3)2 concentrations. Seedling growth and salinity injury of different cultivars were examined after 10 days of treatment. Results showed that significant differences in salt tolerance were observed among 15 different cultivars. Cultivars of Shanghai 903, Suhong 2003, Sunshine 906, Dayu Zhongshu No. 4, Sanxing L402, Tomato Dahong, Zhongshu No. 4, Baoda 903, Xiafen, Maofen 802 were Ca(NO3)2 sensitive; Zaofeng Tomato, Jiangshu No. 14, Baofen, Sanxing 906 were medium Ca(NO3)2 tolerant; Japanese Dafen Queen was Ca(NO3)2 tolerant. The analysis of salt tolerance of 7 tomato rootstock selfed lines: TR-1, TR-2, TR-3, TR-4, TR-5, TR-7, TR-8 was studied at a high Ca(NO3)2 concentration. It was founded that under the same treatment the average numbers of lateral roots of rootstock selfed lines were significantly higher than those of tomato cultivars, while the salt stress indexes of rootstock selfed lines were significantly lower than those of tomato cultivars. The salt tolerance of rootstock selfed lines was higher than that of tomato cultivars, and salt tolerance of TR-8 was highest among the experimented tomato materials.

Key words: tomato, Ca(NO3)2, salt tolerancety

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