Altered Physiology in Trehalose-producing Transgenic Tobacco Plants: Enhanced Tolerance to Drought and Salinity Stresses

Transgenic tobacco (Nicotiana tabacum L. var. SR1) plants that over-express the Escherichia coli trehalose-6-phosphate synthase (TPS) gene (otsA) synthesized small amounts of trehalose (less than400 ㎍ g-¹ leaf) while non-transformants produced no detectable trehalose. Some transgenic plants expressi...

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Veröffentlicht in:	Journal of plant biology = Singmul Hakhoe chi 2005, 48(4), , pp.456-466
Hauptverfasser:	Jun, S.S. (Seoul National University, Seoul, Republic of Korea), Yang, J.Y. (Seoul National University, Seoul, Republic of Korea), Choi, H.J. (Seoul National University, Seoul, Republic of Korea), Kim, N.R. (The Catholic University of Korea, Puchon, Republic of Korea), Park, M.C. (The Catholic University of Korea, Puchon, Republic of Korea), Hong, Y.N. (Seoul National University, Seoul, Republic of Korea), E-mail: ynhong@snu.ac.kr
Format:	Artikel
Sprache:	eng
Schlagworte:	DEHYDRATION DESHIDRATACION DESHYDRATATION Drought Embryos Germination Leaves Physiological responses Physiology Plants Plants (botany) Polyethylene glycol SALINIDAD SALINITE SALINITY Salinity effects Seed germination Sodium chloride stress tolerance Stresses Tobacco Transgenic plants transgenic tobacco TREHALOSA TREHALOSE Trehalose-6-phosphate Trehalose-6-phosphate synthase Turgidity Water potential Water shortages Water supply 생물학
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Zusammenfassung:	Transgenic tobacco (Nicotiana tabacum L. var. SR1) plants that over-express the Escherichia coli trehalose-6-phosphate synthase (TPS) gene (otsA) synthesized small amounts of trehalose (less than400 ㎍ g-¹ leaf) while non-transformants produced no detectable trehalose. Some transgenic plants expressing a high level of otsA exhibited stunted growth and morphologically altered leaves. We tested F₂ homozygous plants devoid of phenotypic changes to determine their physiological responses to dehydration and salinity stresses. All transgenic plants maintained better leaf turgidity under a limited water supply or after treatment with polyethylene glycol (PEG).
ISSN:	1226-9239 1867-0725
DOI:	10.1007/BF03030588