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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.12
- 수록면
- 399 - 408 (10page)
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A fusion gene coding for trehalose-6-phosphate synthase/phosphatase (TPSP) derived from Escherichia coli was introduced into tomato plants (Solanum lycopersicum cv. Joyful) to generate overexpressing lines and enhance the level of trehalose in the seeds. Trehalose has been implicated in tolerance to abiotic stress in plants, so the response to heat stress of seeds from the transgenic lines and seeds from wild-type plants were compared. Wild-type heat-treated seeds had a germination rate of 17%, while four transgenic lines had germination rates over 50% following heat stress. In one heat-treated transgenic line, 100% of the seeds germinated, and therefore had a germination rate six times that of seeds from wild-type plants. Moreover, quantitative PCR revealed that the expression of diverse genes that respond to heat stress was enhanced in TPSP transgenic seeds compared to wild-type seeds 150 min after the onset of heat stress. The enhanced germination rate and expression of these genes in the transgenic seeds were essentially mimicked in wild-type seeds treated with 1 mM exogenous trehalose.
Therefore, accumulated trehalose and associated metabolites may act as signaling molecules that enhance the expression of heat stress-responsive genes and confer heat-stress tolerance to seeds.
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참고문헌 (43)
참고문헌 신청
Al-Whaibi MH / 2011 / Plant heat-shock proteins : a mini review / J King Saud Univ Sci 23:139~150
Avonce N / 2004 / The Arabidopsis trehalose-6-p synthase AtTPS1 gene is a regulator of glucose, abscisic acid, and stress signaling / Plant Physiol 136:3649~3659
Bae H / 2005 / Exogenous trehalose alters Arabidopsis transcripts involved in cell wall modification, abiotic stress, nitrogen metabolism, and plant defense / Physiol Plant 125:114~126
Chan-Schaminet KY / 2009 / Specific interaction between tomato HsfA1 and HsfA2 creates hetero-oligomeric superactivator complexes for synergistic activation of heat stress gene expression / J Biol Chem 284:20848~20857
Debast S / 2011 / Altering trehalose-6-phosphate content in transgenic potato tubers affects tuber growth and alters responsiveness to hormones during sprouting / Plant Physiol 156:1754~1771
Avonce N / 2004 / The Arabidopsis trehalose-6-p synthase AtTPS1 gene is a regulator of glucose, abscisic acid, and stress signaling / Plant Physiol 136:3649~3659
Bae H / 2005 / Exogenous trehalose alters Arabidopsis transcripts involved in cell wall modification, abiotic stress, nitrogen metabolism, and plant defense / Physiol Plant 125:114~126
Chan-Schaminet KY / 2009 / Specific interaction between tomato HsfA1 and HsfA2 creates hetero-oligomeric superactivator complexes for synergistic activation of heat stress gene expression / J Biol Chem 284:20848~20857
Debast S / 2011 / Altering trehalose-6-phosphate content in transgenic potato tubers affects tuber growth and alters responsiveness to hormones during sprouting / Plant Physiol 156:1754~1771
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