Journal Article

Improved Salt Tolerance of Transgenic Tobacco Expressing Apoplastic Yeast-Derived Invertase

Eiichi Fukushima, Yuuto Arata, Tsuyoshi Endo, Uwe Sonnewald and Fumihiko Sato

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 42, issue 2, pages 245-249
Published in print February 2001 | ISSN: 0032-0781
Published online February 2001 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pce027
Improved Salt Tolerance of Transgenic Tobacco Expressing Apoplastic Yeast-Derived Invertase

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  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry

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We investigated the salt tolerance of transgenic tobacco, in which yeast invertase is expressed in the apoplastic (Apo-Inv) spaces. Whereas photosynthetic activities in wild-type tobacco in light were inhibited under salt stress, transgenic Apo-Inv tobacco maintained constant photosynthetic activities. The physical appearance of plants under salt stress also indicates that yeast invertase expression in the apoplastic space is beneficial for inducing salt tolerance. Apo-Inv tobacco had a much higher osmotic pressure increase in the cell sap than did wild-type tobacco under this type of stress. The physiological importance of sucrose metabolism under salt stress is discussed.

Keywords: Key words: Invertase — Nicotiana tabacum — Photosynthesis — Salt stress — Sucrose.; Abbreviations: Apo-Inv, apoplastic invertase; Apo-Inv tobacco, transgenic tobacco expressing yeast invertase in apoplastic space; Fm, maximum yield of Chl fluorescence; Fo, minimum yield of Chl fluorescence; Fv, variable fluorescence Fm-Fo.

Journal Article.  3017 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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